阅读说明：本技术 树脂组合物和树脂成型品 (Resin composition and resin molded article ) 是由 八百健二 宫崎佳奈 田中凉 于 2019-02-28 设计创作，主要内容包括：本发明涉及树脂组合物和树脂成型品。所述树脂组合物包含具有源自生物质的碳原子的树脂,并且满足以下条件(1)至(3)中的至少一个：(1)所述树脂组合物中铁元素的含量相对于树脂组合物为0.1ppm至5ppm,(2)所述树脂组合物中镍元素的含量相对于树脂组合物为0.05ppm至2ppm,和(3)所述树脂组合物中铬元素的含量相对于树脂组合物为0.05ppm至3ppm。(The present invention relates to a resin composition and a resin molded article. The resin composition contains a resin having a biomass-derived carbon atom, and satisfies at least one of the following conditions (1) to (3): (1) the content of the iron element in the resin composition is 0.1ppm to 5ppm relative to the resin composition, (2) the content of the nickel element in the resin composition is 0.05ppm to 2ppm relative to the resin composition, and (3) the content of the chromium element in the resin composition is 0.05ppm to 3ppm relative to the resin composition.)

1. A resin composition comprising a resin having a carbon atom derived from a biomass, and satisfying at least one of the following conditions (1) to (3):

(1) the content of the iron element in the resin composition is 0.1ppm to 5ppm relative to the resin composition,

(2) the content of the nickel element in the resin composition is 0.05ppm to 2ppm with respect to the resin composition, and

(3) the content of chromium element in the resin composition is 0.05ppm to 3ppm with respect to the resin composition.

2. The resin composition according to claim 1, wherein,

wherein the content of biomass-derived carbon atoms in the resin composition as defined in ASTM D6866:2012 is 30% or more relative to the total amount of carbon atoms in the resin composition.

3. The resin composition according to claim 1 or 2, which satisfies the condition (1).

4. The resin composition according to any one of claims 1 to 3, which satisfies the condition (2).

5. The resin composition according to any one of claims 1 to 4, which satisfies the condition (3).

6. The resin composition according to any one of claims 1 to 5, which satisfies the conditions (1), (2) and (3).

7. The resin composition according to any one of claims 1 to 6,

wherein the resin having a biomass-derived carbon atom contains a cellulose acylate (A).

8. The resin composition according to claim 7, wherein,

wherein the cellulose acylate (a) is at least one compound selected from the group consisting of Cellulose Acetate Propionate (CAP) and Cellulose Acetate Butyrate (CAB).

9. The resin composition according to any one of claims 1 to 8,

wherein the content of the cellulose acylate (A) is 50% by weight or more based on the resin composition.

10. The resin composition according to any one of claims 1 to 9, further comprising at least one ester compound (B) selected from the group consisting of a compound represented by formula (1), a compound represented by formula (2), a compound represented by formula (3), a compound represented by formula (4), and a compound represented by formula (5):

wherein R is¹¹Represents an aliphatic hydrocarbon group having 7 to 28 carbon atoms, R¹²Represents an aliphatic hydrocarbon group having 9 to 28 carbon atoms,

R²¹and R²²Each independently represents an aliphatic hydrocarbon group having 7 to 28 carbon atoms,

R³¹and R³²Each independently represents an aliphatic hydrocarbon group having 7 to 28 carbon atoms,

R⁴¹、R⁴²and R⁴³Each independently represents an aliphatic hydrocarbon group having 7 to 28 carbon atoms, and

R⁵¹、R⁵²、R⁵³and R⁵⁴Each independently represents an aliphatic hydrocarbon group having 7 to 28 carbon atoms.

11. The resin composition according to claim 10, wherein the resin composition,

wherein the at least one ester compound (B) is reacted with the resin (A) having a biomass-derived carbon atom^Bio) In weight ratio (B/A)^Bio) Is 0.005 to 0.05.

12. The resin composition according to any one of claims 1 to 11, further comprising a plasticizer (C).

13. The resin composition according to claim 12, wherein the resin composition,

wherein the plasticizer (C) comprises at least one selected from the group consisting of: a cardanol compound, a dicarboxylic acid diester, a citric acid ester, a polyether compound having at least one unsaturated bond in the molecule, a polyether ester compound, a benzoic acid glycol ester, a compound represented by formula (6), and an epoxidized fatty acid ester:

wherein R is⁶¹Represents an aliphatic hydrocarbon group having 7 to 28 carbon atoms, R⁶²Represents an aliphatic hydrocarbon group having 1 to 8 carbon atoms.

14. The resin composition according to claim 12 or 13,

wherein the plasticizer (C) contains a cardanol compound.

15. The resin composition according to any one of claims 1 to 14, further comprising a thermoplastic elastomer (D).

16. The resin composition according to claim 15, wherein the resin composition,

wherein the thermoplastic elastomer (D) comprises at least one selected from the group consisting of a core-shell structure polymer (D1) and an olefin polymer (D2), the core-shell structure polymer (D1) has a core layer and a shell layer containing an alkyl (meth) acrylate polymer on a surface of the core layer, the olefin polymer (D2) is a polymer of α -olefin and alkyl (meth) acrylate and contains 60% by weight or more of a structural unit derived from the α -olefin.

17. The resin composition according to any one of claims 1 to 16, further comprising particles containing at least one selected from the group consisting of an iron element, a nickel element, and a chromium element.

18. A resin molded article comprising the resin composition as defined in any one of claims 1 to 17.

19. The resin molded article according to claim 18, which is an injection molded article.

Technical Field

The present invention relates to a resin composition and a resin molded article.

Background

In the related art, various resin compositions have been provided and used for various purposes. The resin composition has been used particularly for household appliances and various automobile parts, housings, and the like. In addition, thermoplastic resins are also used for parts such as housings of office equipment and electronic and electrical equipment.

In recent years, resins derived from biomass (organic resources derived from organisms other than fossil resources) have been used, and as one of resins having carbon atoms derived from biomass known in the related art, cellulose acylate can be exemplified.

As the resin composition in the related art, the following compositions disclosed in patent documents 1 to 3 can be cited.

JP-A-2013-079319 discloses ｃA resin composition comprising: (A) a cellulose ester, (B) a styrene-based resin, and (C) titanium dioxide, wherein in the content of each of the (A) component and the (B) component, (A) component is 95 to 50% by weight, the (B) component is 50 to 5% by weight, and the content of the (C) component is 0.1 to 10 parts by mass relative to the total amount (100 parts by mass) of the (A) component and the (B) component, and the resin composition does not contain a compatibilizer of the (A) component and the (B) component.

JP-A-10-101925 discloses ｃA resin composition for sliding parts comprising: 0.1 to 3% by weight of a composite metal oxide; 0.5 to 8% by weight of calcium fluoride; 0.5 to 8 weight percent of tungsten disulfide; the balance being nylon 11 or nylon 12.

JP-T-2015-504111 discloses a composition comprising lignin and elements in a total amount of less than about 2000 Mg/1 kg lignin, wherein the elements are Al, As, B, Ba, Be, Ca, Cd, Co, Cr, Cu, Fe, K, Li, Mg, Mn, Mo, Na, Ni, P, Pb, S, Sb, Se, Si, Sn, Sr, Ti, Tl, V and Zn.

Disclosure of Invention

The purpose of the present invention is to provide a resin composition in the form of a resin composition containing a resin having carbon atoms derived from biomass, which enables to obtain a resin molded article excellent in chemical resistance.

This object is achieved by the following means.

<1> according to one aspect of the present disclosure, there is provided a resin composition comprising a resin having carbon atoms derived from biomass, and satisfying at least one of the following conditions (1) to (3):

(1) the content of the iron element in the resin composition is 0.1ppm to 5ppm relative to the resin composition;

(2) the content of the nickel element in the resin composition is 0.05ppm to 2ppm relative to the resin composition;

(3) the content of chromium element in the resin composition is 0.05ppm to 3ppm relative to the resin composition.

<2> the resin composition as stated in <1>, wherein a content of the biomass-derived carbon atoms in the resin composition as defined in ASTM D6866:2012 is 30% or more relative to a total amount of carbon atoms in the resin composition.

<3> the resin composition as stated in <1> or <2>, which satisfies the condition (1).

<4> the resin composition as stated in any one of <1> to <3>, which satisfies the condition (2).

<5> the resin composition as stated in any one of <1> to <4>, which satisfies the condition (3).

<6> the resin composition as stated in any one of <1> to <5>, which satisfies the conditions (1), (2), (3).

<7> the resin composition according to any one of <1> to <6>, wherein the resin having a carbon atom derived from a biomass contains a cellulose acylate (A).

<8> the resin composition according to <7>, wherein the cellulose acylate (A) is at least one compound selected from the group consisting of Cellulose Acetate Propionate (CAP) and Cellulose Acetate Butyrate (CAB).

<9> the resin composition according to any one of <1> to <8>, wherein a content of the cellulose acylate (a) is 50% by weight or more relative to the resin composition.

<10> the resin composition according to any one of <1> to <9>, which further comprises at least one ester compound (B) selected from the group consisting of a compound represented by formula (1), a compound represented by formula (2), a compound represented by formula (3), a compound represented by formula (4), and a compound represented by formula (5).

In the formula (1), R¹¹Represents an aliphatic hydrocarbon group having 7 to 28 carbon atoms, R¹²Represents an aliphatic hydrocarbon group having 9 to 28 carbon atoms. In the formula (2), R²¹And R²²Each independently represents an aliphatic hydrocarbon group having 7 to 28 carbon atoms. In the formula (3), R³¹And R³²Each independently represents an aliphatic hydrocarbon group having 7 to 28 carbon atoms. In the formula (4), R⁴¹、R⁴²And R⁴³Each independently represents an aliphatic hydrocarbon group having 7 to 28 carbon atoms. In the formula (5), R⁵¹、R⁵²、R⁵³And R⁵⁴Each independently represents an aliphatic hydrocarbon group having 7 to 28 carbon atoms.

<11>Such as<10>The resin composition of (a), wherein the at least one ester compound (B) is reacted with the resin having a biomass-derived carbon atom (a)^Bio) In weight ratio (B/A)^Bio) Is 0.005 to 0.05.

<12> the resin composition as stated in any one of <1> to <11>, which further comprises a plasticizer (C).

<13> the resin composition as stated in <12>, wherein the plasticizer (C) comprises at least one selected from the group consisting of: a cardanol compound, a dicarboxylic acid diester, a citric acid ester, a polyether compound having at least one unsaturated bond in the molecule, a polyether ester compound, a benzoic acid glycol ester, a compound represented by formula (6), and an epoxidized fatty acid ester:

in the formula (6), R⁶¹Represents an aliphatic hydrocarbon group having 7 to 28 carbon atoms, R⁶²Represents an aliphatic hydrocarbon group having 1 to 8 carbon atoms.

<14> the resin composition <12> or <13>, wherein the plasticizer (C) comprises a cardanol compound.

<15> the resin composition as stated in any one of <1> to <14>, which further comprises a thermoplastic elastomer (D).

<16> the resin composition as stated in <15>, wherein the thermoplastic elastomer (D) comprises at least one selected from the group consisting of a core-shell structure polymer (D1) and an olefin polymer (D2), the core-shell structure polymer (D1) has a core layer and a shell layer containing an alkyl (meth) acrylate polymer on a surface of the core layer, and the olefin polymer (D2) is a polymer of α -olefin and alkyl (meth) acrylate and contains 60% by weight or more of a structural unit derived from the α -olefin.

<17> the resin composition as stated in any one of <1> to <16>, further comprising particles containing at least one selected from the group consisting of an iron element, a nickel element and a chromium element.

<18> according to another aspect of the present disclosure, there is provided a resin molded article comprising the resin composition of any one of <1> to <17 >.

<19> the resin molded article <18>, which is an injection molded article.

According to the inventions of <1> to <6>, there is provided a resin composition in the form of a resin composition containing a resin having a carbon atom derived from a biomass, which is capable of obtaining a resin molded article excellent in chemical resistance as compared with the case where any of the above conditions (1) to (3) is not satisfied.

According to the invention as <7>, there is provided a resin composition which is a resin having a carbon atom derived from a biomass and which can give a resin molded article having more excellent chemical resistance than the case of containing only polylactic acid.

According to the invention as <8>, there is provided a resin composition which can give a resin molded article having more excellent chemical resistance than a case where the cellulose acylate (a) is cellulose acetate.

According to the invention as described in <9>, there is provided a resin composition which can provide a resin molded article having more excellent chemical resistance than a case where the content of the cellulose acylate (a) is less than 50% by weight based on the resin composition.

According to<10>The invention described above provides a resin composition which can give a resin molded article having more excellent chemical resistance than a case where the resin composition contains only a resin having a carbon atom derived from a biomass or a case where the resin composition contains an ester compound (B) in which R is¹¹、R²¹、R²²、R³¹、R³²、R⁴¹、R⁴²、R⁴³、R⁵¹、R⁵²、R⁵³And R⁵⁴Represents an aliphatic hydrocarbon group having less than 7 carbon atoms or more than 28 carbon atoms, or R¹²Denotes an aliphatic hydrocarbon group having less than 9 carbon atoms or more than 28 carbon atoms.

According to<11>Said invention provides a resin composition which is synthesized with said at least one esterThe substance (B) and the resin (A) having a biomass-derived carbon atom^Bio) In weight ratio (B/A)^Bio) When the amount of the crosslinking agent is less than 0.005 or more than 0.05, a resin molded article having more excellent chemical resistance can be obtained.

According to the invention as <12> or <13>, there is provided a resin composition which can obtain a resin molded article more excellent in chemical resistance than a case where the resin composition contains only a resin having a carbon atom derived from a biomass.

According to the invention described in <14>, there is provided a resin composition which can provide a resin molded article having more excellent chemical resistance than a case where the plasticizer (C) contains at least one selected from the group consisting of a dicarboxylic acid diester, a citric acid ester, a polyether compound having at least one unsaturated bond in the molecule, a polyether ester compound, ethylene glycol benzoate, a compound represented by the formula (6), and an epoxidized fatty acid ester.

According to the invention as <15>, there is provided a resin composition which can obtain a resin molded article having more excellent puncture impact strength (punch impact strength) than a case where the resin composition contains only a resin having a carbon atom derived from a biomass.

According to the invention as <16>, there is provided a resin composition capable of obtaining a resin molded article more excellent in chemical resistance as compared with the case where the thermoplastic elastomer (D) does not contain at least one selected from the group consisting of the core-shell structure polymer (D1) and the olefin polymer (D2) wherein the core-shell structure polymer (D1) has a core layer and a shell layer of a polymer containing an alkyl (meth) acrylate ester on the surface of the core layer, and the olefin polymer (D2) is a polymer of α -olefin and an alkyl (meth) acrylate ester and contains 60% by weight or more of a structural unit derived from the α -olefin.

According to the invention as <17>, there is provided a resin composition which is more excellent in dispersibility and temporal stability when it contains particles containing at least one selected from the group consisting of an iron element, a nickel element and a chromium element, and which is capable of obtaining a resin molded article more excellent in chemical resistance.

According to the invention as <18>, there is provided a resin molded article having excellent chemical resistance as compared with the case of applying the resin composition not satisfying any of the above conditions (1) to (3) in the form of the resin composition containing a resin having a carbon atom derived from a biomass.

According to the invention as <19>, there is provided an injection-molded article as a resin-molded article having excellent chemical resistance as compared with the case of applying a resin composition which does not satisfy any of the above-described conditions (1) to (3) in the form of a resin composition containing a resin having a biomass-derived carbon atom.

Detailed Description

Hereinafter, exemplary embodiments will be described as examples of the present invention. These descriptions and examples are illustrative of exemplary embodiments and do not limit the scope of the exemplary embodiments. In the numerical ranges described in a stepwise manner, the upper limit value or the lower limit value described in one numerical range may be replaced with the upper limit value or the lower limit value described in another numerical range in a stepwise manner. In addition, in the numerical ranges described in the exemplary embodiments, the upper limit value or the lower limit value of the numerical range may be replaced with the values described in the examples. In an exemplary embodiment, the term "step" includes not only an independent step but also a case where an intended purpose of the step can be achieved even though it may not be clearly distinguished from other steps. In exemplary embodiments, each component may comprise a plurality of respective substances. In an exemplary embodiment, where reference is made to the amount of each component in the composition, if there are multiple substances corresponding to each component in the composition, it refers to the total amount of the multiple substances, unless otherwise specified. In exemplary embodiments, "(meth) acrylic" refers to at least one of acrylic and methacrylic, and "(meth) acrylate" refers to at least one of acrylate and methacrylate. In the exemplary embodiment, the cellulose acylate (a), the ester compound (B), the plasticizer (C) and the thermoplastic elastomer (D) are also referred to as a component (a), a component (B), a component (C) and a component (D), respectively.

< resin composition >

The resin composition of the exemplary embodiment contains a resin having a carbon atom derived from biomass, and satisfies at least one of the following conditions (1) to (3): (1) the content of the iron element in the resin composition is 0.1ppm to 5ppm relative to the resin composition; (2) the content of the nickel element in the resin composition is 0.05ppm to 2ppm relative to the resin composition; (3) the content of chromium element in the resin composition is 0.05ppm to 3ppm relative to the resin composition.

The resin composition of the exemplary embodiment may include other components such as an ester compound (B), a plasticizer (C), and a thermoplastic elastomer (D) described below.

Unlike resin compositions derived from fossil resources such as petroleum, it is difficult in the related art to freely design a molecular structure in a resin composition containing a biomass-derived component, and to impart desired properties.

In addition, many resins having carbon atoms derived from biomass have excellent chemical resistance, such as representative cellulose acylate and polyamide 11. It can be said that the response to a change in the surrounding environment is its natural ability. However, for chemicals having a large influence on the resin (e.g., hand creams and sun screens), even if cellulose acylate or polyamide 11 is used, the chemical resistance of the resulting resin molded article is insufficient, and cracks (cracks) and crazes) may occur in some cases.

In contrast, the resin composition of the exemplary embodiment contains a resin having a carbon atom derived from biomass, and at least one of the above-described conditions (1) to (3) is satisfied, thereby obtaining a resin molded article excellent in chemical resistance. The reason is presumed as follows.

One of the chemicals having a large influence on the resin is vegetable oil. The present inventors believe that such chemicals act on the resin component of the resin composition, the resin decomposes, the strength of the resin composition decreases, and thus cracks, such as fissures, occur in the resin molded article. When the resin composition includes a resin having a biomass-derived carbon atom, the resin composition has a high affinity for chemicals and thus has relatively high chemical resistance, as compared to a petroleum-derived resin. Even with high chemical resistance, breakage of the resin molded article may occur in some cases.

On the other hand, it is presumed that when a trace amount of a specific type of metal element is present in the resin composition, a core-shell structure containing, for example, the metal element as a core is formed in the resin composition, and a chemical such as vegetable oil cannot penetrate the structure, preventing penetration and influence of the resin molded product due to contact with the chemical. Regarding the kind and amount of the metal element, in the case where the resin composition contains 0.1 to 5ppm of an iron element, 0.05 to 2ppm of a nickel element, or 0.05 to 3ppm of a chromium element, since the dispersion uniformity of the metal element is excellent in relation to the polarity of the resin having carbon atoms derived from biomass, the core-shell structure functionally functions, and the influence of chemicals is prevented, thereby improving chemical resistance.

For the above reasons, it is considered that the resin molded article obtained from the resin composition in the exemplary embodiment has excellent chemical resistance.

Hereinafter, each component of the resin composition of the exemplary embodiment will be described in detail.

< content of Metal element >

The resin composition of the exemplary embodiment satisfies at least one of the following conditions (1) to (3): (1) the content of the iron element in the resin composition is 0.1ppm to 5ppm relative to the resin composition; (2) the content of the nickel element in the resin composition is 0.05ppm to 2ppm relative to the resin composition; (3) the content of chromium element in the resin composition is 0.05ppm to 3ppm relative to the resin composition.

In addition, the resin composition of the exemplary embodiment preferably satisfies at least two of the above-described conditions (1) to (3), and more preferably satisfies the above-described conditions (1), (2), and (3), from the viewpoint of chemical resistance of the resulting resin molded article.

In an exemplary embodiment, the method of measuring the content of each metal element in the resin composition is performed using a High-resolution Inductively Coupled Plasma (ICP) emission spectrometer (PS 3500DDII manufactured by Hitachi High-Tech Sciences co., Ltd), thereby measuring the content of at least one metal element selected from the group consisting of an iron element, a nickel element, and a chromium element with respect to the entire resin composition.

The resin composition of the exemplary embodiment satisfies at least the above condition (1), i.e., preferably contains 0.1 to 5ppm of an iron element relative to the resin composition, from the viewpoint of chemical resistance of the resulting resin molded article; more preferably 0.3 to 4.5ppm of an iron element relative to the resin composition; further preferably 1.0ppm to 4.0ppm of the iron element relative to the resin composition, and particularly preferably 2.0ppm to 3.5ppm of the iron element relative to the resin composition.

The resin composition of the exemplary embodiment satisfies at least the above condition (2), i.e., preferably contains 0.05 to 2ppm of nickel element relative to the resin composition, from the viewpoint of chemical resistance of the resulting resin molded article; more preferably 0.1 to 1.6ppm of nickel element relative to the resin composition; further preferably 0.5ppm to 1.5ppm of nickel element relative to the resin composition, and particularly preferably 1.0ppm to 1.5ppm of nickel element relative to the resin composition.

The resin composition of the exemplary embodiment satisfies at least the above condition (3), i.e., preferably contains 0.05 to 3ppm of chromium element relative to the resin composition, from the viewpoint of chemical resistance of the resulting resin molded article; more preferably 0.1ppm to 2.7ppm of chromium element relative to the resin composition; further preferably 1.0ppm to 2.5ppm of chromium element relative to the resin composition, and particularly preferably 1.5ppm to 2.3ppm of chromium element relative to the resin composition.

The resin composition of the exemplary embodiment includes an iron element, a nickel element, and a chromium element in a metal simple substance state, a metal salt state, or a metal complex state; however, it is preferably contained in a state of a simple metal (zero-valent metal) from the viewpoint of dispersibility, stability with time, and chemical resistance of the resulting resin molded article.

In addition, from the viewpoint of dispersibility, temporal stability, and chemical resistance of the resulting resin molded article, the resin composition of the exemplary embodiment preferably includes particles containing at least one selected from the group consisting of an iron element, a nickel element, and a chromium element, more preferably includes at least one selected from the group consisting of iron particles, nickel particles, and chromium particles, further preferably includes at least two selected from the group consisting of iron particles, nickel particles, and chromium particles, and particularly preferably includes iron particles, nickel particles, and chromium particles. The iron, nickel and chromium particles may all contain other trace elements (e.g., less than 1 mass% relative to the total mass of the particles).

The volume average particle diameter of the particles is preferably 10nm to 200 μm, more preferably 10nm to 100 μm.

In the method of measuring the volume average particle diameter of particles, the cross section of the resin composition or the resin molded article is observed with an electron microscope, and the equivalent circle diameter thereof is measured to calculate the volume average particle diameter.

[ resin having Biomass-derived carbon atoms ]

The resin composition of the exemplary embodiment includes a resin having carbon atoms derived from biomass.

The resin having a carbon atom derived from biomass is not particularly limited, and known resins having a carbon atom derived from biomass have been used.

In addition, as the resin having a carbon atom derived from biomass, not all of the resins need to be derived from biomass, and at least a part thereof may have a structure derived from biomass. Specifically, for example, cellulose acylate described below may have a cellulose structure derived from biomass and an acylate structure derived from petroleum.

Note that, in the exemplary embodiment, the "resin having a biomass-derived carbon atom" is a resin having at least a carbon atom derived from an organic resource of an organism other than a fossil resource, and as described below, the presence of a biomass-derived carbon atom is defined by ASTM D6866:2012¹⁴Abundance of C indicates.

In the resin composition of the exemplary embodiment, the content of the carbon atoms derived from biomass, as defined by ASTM D6866:2012, relative to the total amount of carbon atoms in the resin composition, is preferably 20% or more, more preferably 30% or more, further preferably 35% or more, and particularly preferably 40% to 100%, from the viewpoint of chemical resistance of the resulting resin molded article.

Further, in exemplary embodiments, the method of measuring the content of biomass-derived carbon atoms of the resin composition is by measuring of total carbon atoms of the resin composition based on the provisions of ASTM D686: 2012¹⁴The C abundance is used to calculate the content of carbon atoms derived from the biomass.

Examples of resins having biomass-derived carbon atoms include: cellulose acylate, polylactic acid, polyolefin derived from biomass, polyethylene terephthalate derived from biomass, polyamide derived from biomass, poly (3-hydroxybutyric acid), polytrimethylene terephthalate (PTT), polybutylene succinate (PBS), Phosphatidylglycerol (PG), isosorbide polymer and acrylic modified rosin.

Among them, from the viewpoint of chemical resistance of the resulting resin molded article, the resin having a biomass-derived carbon atom preferably contains cellulose acylate (a), and more preferably, the resin having a biomass-derived carbon atom is cellulose acylate (a).

Cellulose acylate (A): component (A) —

The cellulose acylate (a) is a cellulose derivative in which at least a part of the hydroxyl groups in the cellulose are substituted (acylated) with acyl groups. Acyl is of the formula-CO-R^ACGroup of the structure (R)^ACRepresents a hydrogen atom or a hydrocarbon group).

The cellulose acylate (a) is a cellulose derivative represented by the formula (CA).

In the formula (CA), A¹、A²And A³Independently represents a hydrogen atom or an acyl group, and n represents an integer of 2 or more. Here, n are A¹N number of A²And n is A³At least a part of (a) representsAn acyl group. All n A's in the molecule¹May be the same, partially the same or different from each other. Similarly, all n A's in a molecule²May be the same as, partially the same as or different from each other, and all n A's in the molecule³May be the same, partially the same or different from each other.

In the reaction of A¹、A²And A³In the acyl group, the hydrocarbon group in the acyl group may be linear, branched or cyclic, but is preferably linear or branched, more preferably linear.

In the reaction of A¹、A²And A³In the acyl group represented, the hydrocarbon group in the acyl group may be a saturated hydrocarbon group or may be an unsaturated hydrocarbon group, and is more preferably a saturated hydrocarbon group.

From A¹、A²And A³The acyl group represented is preferably an acyl group having 1 to 6 carbon atoms. That is, as the cellulose acylate (a), a cellulose acylate (a) containing an acyl group having 1 to 6 carbon atoms is preferable. With the cellulose acylate (a) containing an acyl group having 1 to 6 carbon atoms, a resin molded article more excellent in chemical resistance is easily obtained as compared with the case of the cellulose acylate (a) containing an acyl group having 7 or more carbon atoms.

From A¹、A²And A³The acyl group represented may be a group in which a hydrogen atom in the acyl group is substituted with a halogen atom (for example, a fluorine atom, a bromine atom and an iodine atom), an oxygen atom, a nitrogen atom or the like, and is preferably an unsubstituted group.

From A¹、A²And A³Examples of the acyl group represented include formyl, acetyl, propionyl, butyryl (butyryl group), acryloyl and hexanoyl. Among them, from the viewpoint of moldability of the resin composition and chemical resistance of the resin molded article, the acyl group is more preferably an acyl group having 2 to 4 carbon atoms, and still more preferably an acyl group having 2 or 3 carbon atoms.

Examples of the cellulose acylate (a) include cellulose acetates (mono-, di-and tri-acetates), Cellulose Acetate Propionate (CAP) and Cellulose Acetate Butyrate (CAB).

From the viewpoint of chemical resistance of the resulting resin molded article, the cellulose acylate (a) is preferably Cellulose Acetate Propionate (CAP) and Cellulose Acetate Butyrate (CAB), more preferably Cellulose Acetate Propionate (CAP).

The cellulose acylate (a) may be used alone, or two or more thereof may be used in combination.

The weight-average degree of polymerization of the cellulose acylate (a) is preferably from 200 to 1000, more preferably from 600 to 1000, from the viewpoint of moldability of the resin composition and chemical resistance of the resulting resin molded article.

The weight-average degree of polymerization of the cellulose acylate (a) is determined from the weight-average molecular weight (Mw) by the following procedure.

First, the weight average molecular weight (Mw) of the cellulose acylate (A) was measured with reference to polystyrene using a gel permeation chromatography apparatus (GPC apparatus: manufactured by TOSOH CORPORATION, HLC-8320GPC, column: TSKgel α -M) using tetrahydrofuran.

Next, the weight average molecular weight (Mw) of the cellulose acylate (a) is divided by the molecular weight of the structural unit of the cellulose acylate (a) to determine the degree of polymerization of the cellulose acylate (a). For example, in the case where the substituent of the cellulose acylate is an acetyl group, the molecular weight of the structural unit is 263 when the substitution degree is 2.4, and 284 when the substitution degree is 2.9.

The weight average molecular weight (Mw) of the resin in the exemplary embodiment is also measured by the same method as the method of measuring the weight average molecular weight of the cellulose acylate (a).

The degree of substitution of the cellulose acylate (a) is preferably from 2.1 to 2.9, more preferably from 2.2 to 2.9, further preferably from 2.3 to 2.9, particularly preferably from 2.6 to 2.9, from the viewpoint of moldability of the resin composition and chemical resistance of the resulting resin molded article.

In the Cellulose Acetate Propionate (CAP), the ratio of the substitution degree of acetyl group to propionyl group (acetyl group/propionyl group) is preferably 0.01 to 1, more preferably 0.05 to 0.1, from the viewpoints of moldability of the resin composition and chemical resistance of the resulting resin molded article.

As the CAP, a CAP satisfying at least one of the following (1), (2), (3) and (4) is preferable, a CAP satisfying the following (1), (3) and (4) is more preferable, a CAP satisfying the following (2), (3) and (4) is further preferable: (1) when measured by a GPC method with tetrahydrofuran as a solvent, the weight average molecular weight (Mw) of the reference polystyrene is 160000 to 250000, and the ratio Mn/Mz of the number average molecular weight (Mn) of the reference polystyrene to the Z average molecular weight (Mz) of the reference polystyrene is 0.14 to 0.21. (2) when measured by a GPC method with tetrahydrofuran as a solvent, the weight average molecular weight (Mw) of the reference polystyrene is 160000 to 250000, the ratio Mn/Mz of the number average molecular weight (Mn) of the reference polystyrene to the Z average molecular weight (Mz) of the reference polystyrene is 0.14 to 0.21, and the ratio Mn/Mz of the weight average molecular weight (Mn) of the polystyrene to the Z average molecular weight (Mz) of the reference polystyrene is 0.6 to 0.7.7.7% when measured by a GPC method with tetrahydrofuran as a GPC method, the viscosity (20.7) is 36 to 19.6) of a sheet after standing at a temperature of a temperature (20 mm, 19 mm, a temperature, a viscosity of a sheet after measurement is 19 mm < 8.8.8.8 mm <3 <8 <3> to 19> mm <8> mm <3> to 19> when measured by a viscosity (19 > mm <8 <3 <8> mm < 2.

Here, the MD direction refers to a longitudinal direction of a cavity of a mold for injection molding, and the TD direction refers to a direction perpendicular to the MD direction.

In Cellulose Acetate Butyrate (CAB), the ratio of the degree of substitution of acetyl groups to butyryl groups (acetyl/butyryl groups) is preferably 0.05 to 3.5, more preferably 0.5 to 3.0, from the viewpoints of formability of the resin composition and chemical resistance of the resulting resin molded article.

The degree of substitution of the cellulose acylate (a) is an index indicating the degree of substitution of the hydroxyl group of the cellulose with the acyl group. In other words, the degree of substitution is an index indicating the degree of acylation of the cellulose acylate (a). Specifically, the degree of substitution refers to the intramolecular average of the number of substitutions by acyl groups of three hydroxyl groups in the D-glucopyranose unit of the cellulose acylate. Degree of substitution is given by¹H-NMR (JMN-ECA, by JEOL RESO)NANCE preparation) of cellulose and the ratio of the peak integrals of hydrogen atoms derived from acyl groups to the peak integrals of hydrogen atoms derived from cellulose.

The resin having a carbon atom derived from biomass may be used alone, or two or more thereof may be used in combination.

[ ester compound (B): component (B) ]

From the viewpoint of chemical resistance of the resulting resin molded article, the resin composition of the exemplary embodiment preferably further comprises at least one ester compound (B) selected from the group consisting of the compound represented by formula (1), the compound represented by formula (2), the compound represented by formula (3), the compound represented by formula (4), and the compound represented by formula (5).

Among them, from the viewpoint of chemical resistance of the obtained resin molded article, the resin composition of the exemplary embodiment more preferably contains, as the ester compound (B), at least one selected from the group consisting of the compound represented by formula (1), the compound represented by formula (2), and the compound represented by formula (3), further preferably contains at least one selected from the group consisting of the compound represented by formula (1) and the compound represented by formula (2), and particularly preferably contains the compound represented by formula (1).

In the formula (1), R¹¹Represents an aliphatic hydrocarbon group having 7 to 28 carbon atoms, R¹²Represents an aliphatic hydrocarbon group having 9 to 28 carbon atoms.

In the formula (2), R²¹And R²²Each independently represents an aliphatic hydrocarbon group having 7 to 28 carbon atoms.

In the formula (3), R³¹And R³²Each independently represents an aliphatic hydrocarbon group having 7 to 28 carbon atoms.

In the formula (4), R⁴¹、R⁴²And R⁴³Each independently represents an aliphatic hydrocarbon group having 7 to 28 carbon atoms.

In the formula (5), R⁵¹、R⁵²、R⁵³And R⁵⁴Each independently of the otherRepresents an aliphatic hydrocarbon group having 7 to 28 carbon atoms.

R¹¹Represents an aliphatic hydrocarbon group having 7 to 28 carbon atoms. From R¹¹From the viewpoint that the group represented may act as a lubricant for the resin molecular chain, R¹¹The group represented by (a) is preferably an aliphatic hydrocarbon group having 9 or more carbon atoms, more preferably an aliphatic hydrocarbon group having 10 or more carbon atoms, and still more preferably an aliphatic hydrocarbon group having 15 or more carbon atoms. From R¹¹R is a group which may enter between molecular chains of a resin (particularly cellulose acylate (A), hereinafter the same applies)¹¹The group represented by (a) is preferably an aliphatic hydrocarbon group having 24 or less carbon atoms, more preferably an aliphatic hydrocarbon group having 20 or less carbon atoms, and still more preferably an aliphatic hydrocarbon group having 18 or less carbon atoms. R¹¹The radicals indicated are particularly preferably aliphatic hydrocarbon radicals having 17 carbon atoms.

R¹¹The groups represented may be saturated aliphatic hydrocarbon groups and unsaturated aliphatic hydrocarbon groups. From R¹¹From the viewpoint that the groups represented may enter between molecular chains of the resin, R¹¹The group represented is preferably a saturated aliphatic hydrocarbon group.

R¹¹The group represented may be a straight-chain aliphatic hydrocarbon group, a branched aliphatic hydrocarbon group or an aliphatic hydrocarbon group containing an alicyclic ring. From R¹¹From the viewpoint that the groups represented may enter between molecular chains of the resin, R¹¹The group represented is preferably an aliphatic hydrocarbon group (i.e., a chain aliphatic hydrocarbon group) free of alicyclic group, and more preferably a linear aliphatic hydrocarbon group.

At R¹¹When the group represented is an unsaturated aliphatic hydrocarbon group, from R¹¹From the viewpoint that the groups represented may enter between molecular chains of the resin, R¹¹The number of unsaturated bonds in the group represented is preferably 1 to 3, more preferably 1 or 2, and further preferably 1.

At R¹¹When the group represented is an unsaturated aliphatic hydrocarbon group, from R¹¹The groups represented may enter between molecular chains of the resin and be containedFrom the viewpoint of easily acting as a lubricant for resin molecular chains, R¹¹The group represented preferably contains a straight-chain saturated hydrocarbon chain having 5 to 24 carbon atoms, more preferably contains a straight-chain saturated hydrocarbon chain having 7 to 22 carbon atoms, further preferably contains a straight-chain saturated hydrocarbon chain having 9 to 20 carbon atoms, and particularly preferably contains a straight-chain saturated hydrocarbon chain having 15 to 18 carbon atoms.

At R¹¹In the case where the group represented is a branched aliphatic hydrocarbon group, from R¹¹From the viewpoint that the groups represented may enter between molecular chains of the resin, R¹¹The number of branches in the group represented is preferably 1 to 3, more preferably 1 or 2, and further preferably 1.

At R¹¹In the case where the group represented is a branched aliphatic hydrocarbon group, from R¹¹R may enter between molecular chains of the resin and easily act as a lubricant for the molecular chains of the resin¹¹The main chain of the group represented by (a) preferably contains 5 to 24 carbon atoms, more preferably contains 7 to 22 carbon atoms, further preferably contains 9 to 20 carbon atoms, and particularly preferably contains 15 to 18 carbon atoms.

At R¹¹When the group represented is an alicyclic-containing aliphatic hydrocarbon group, R is selected from¹¹From the viewpoint that the groups represented may enter between molecular chains of the resin, R¹¹The number of alicyclic rings in the group represented is preferably 1 or 2, more preferably 1.

At R¹¹When the group represented is an alicyclic-containing aliphatic hydrocarbon group, R is selected from¹¹From the viewpoint that the groups represented may enter between molecular chains of the resin, R¹¹The alicyclic group in the group represented is preferably an alicyclic group having 3 or 4 carbon atoms, and more preferably an alicyclic group having 3 carbon atoms.

From the viewpoint of further improving the chemical resistance of the resin molded article, R¹¹The group represented is preferably a straight-chain saturated aliphatic hydrocarbon group, a straight-chain unsaturated aliphatic hydrocarbon group, a branched saturated aliphatic hydrocarbon group or a branched unsaturated aliphatic hydrocarbon group, and particularly preferably a straight-chain saturated aliphatic hydrocarbon group. The number of carbon atoms in these aliphatic hydrocarbon groups is preferably as described above。

R¹¹The group represented may be a group in which a hydrogen atom in the aliphatic hydrocarbon group is substituted with a halogen atom (for example, a fluorine atom, a bromine atom, and an iodine atom), an oxygen atom, a nitrogen atom, or the like, and is preferably an unsubstituted group.

R¹²Represents an aliphatic hydrocarbon group having 9 to 28 carbon atoms. As R¹²The radicals represented may be mentioned as being related to R¹¹The same forms as those described. Here, R¹²The number of carbon atoms of the group represented is preferably as follows.

From R¹²From the viewpoint that the group represented may act as a lubricant for the resin molecular chain, R¹²The group represented by (a) is preferably an aliphatic hydrocarbon group having 10 or more carbon atoms, more preferably an aliphatic hydrocarbon group having 11 or more carbon atoms, and still more preferably an aliphatic hydrocarbon group having 16 or more carbon atoms. From R¹²From the viewpoint that the groups represented may enter between molecular chains of the resin, R¹²The group represented by (a) is preferably an aliphatic hydrocarbon group having 24 or less carbon atoms, more preferably an aliphatic hydrocarbon group having 20 or less carbon atoms, and still more preferably an aliphatic hydrocarbon group having 18 or less carbon atoms. R¹²The radicals indicated are particularly preferably aliphatic hydrocarbon radicals having 18 carbon atoms.

From the viewpoint of further improving the chemical resistance of the resin molded article, R¹²The group represented is preferably a straight-chain saturated aliphatic hydrocarbon group, a straight-chain unsaturated aliphatic hydrocarbon group, a branched saturated aliphatic hydrocarbon group or a branched unsaturated aliphatic hydrocarbon group, and particularly preferably a straight-chain saturated aliphatic hydrocarbon group. The number of carbon atoms in these aliphatic hydrocarbon groups is preferably as described above.

R²¹、R²²、R³¹、R³²、R⁴¹、R⁴²、R⁴³、R⁵¹、R⁵²、R⁵³And R⁵⁴The particular and preferred forms of the radicals indicated and for R¹¹Those described are the same.

Hereinafter, the compound represented by R will be described¹¹、R²¹、R²²、R³¹、R³²、R⁴¹、R⁴²、R⁴³、R⁵¹、R⁵²、R⁵³And R⁵⁴Specific examples of the aliphatic hydrocarbon group having 7 to 28 carbon atoms represented and represented by R¹²Specific examples of the aliphatic hydrocarbon group having 9 to 28 carbon atoms are shown, but the exemplary embodiments are not limited thereto.

The ester compound (B) may be used alone, or two or more thereof may be used in combination.

[ plasticizer (C): component (C) ]

The resin composition of the exemplary embodiment preferably further includes a plasticizer (C) from the viewpoint of chemical resistance of the resulting resin molded article.

Examples of the plasticizer (C) include cardanol compounds, ester compounds other than the ester compound (B), camphor, metal soaps, polyhydric alcohols, and polyalkylene oxides. The plasticizer (C) is preferably a cardanol compound from the viewpoint of chemical resistance of the resin molded product, and is preferably an ester compound other than the ester compound (B) from the viewpoint of chemical resistance of the resin molded product.

The plasticizer (C) may be used alone, or two or more thereof may be used in combination.

The plasticizer (C) is preferably a cardanol compound or an ester compound other than the ester compound (B) from the viewpoint that the effect of improving chemical resistance is easily obtained by adding the ester compound (B). Hereinafter, cardanol compounds and ester compounds suitable as the plasticizer (C) will be specifically described.

-Cardanol Compound-

The cardanol compound refers to a component (for example, a compound represented by formulae (c-1) to (c-4)) contained in a compound derived from a natural source of cashew nuts or a derivative of the above component.

The cardanol compound may be used alone, or two or more thereof may be used in combination.

The resin composition of the exemplary embodiment may include a mixture of compounds derived from natural sources of cashews as the cardanol compound (hereinafter, also referred to as "cashew-source mixture").

The resin composition of the present exemplary embodiment may include a derivative from a cashew source mixture as a cardanol compound. As the derivative derived from the cashew nut-derived mixture, for example, the following mixture and pure substance can be exemplified.

Mixtures prepared by adjusting the composition ratio of the components in the cashew source mixture

Pure substance, which is a specific component separated from the cashew source mixture

Mixtures containing modified products obtained by modifying the components of the cashew source mixture

Mixtures comprising polymers obtained by polymerising components of cashew source mixtures

A mixture comprising a modified polymer obtained by modifying and polymerizing components of the cashew source mixture

A mixture comprising a modified product obtained by: preparing a mixture by adjusting the composition ratio of each component in the cashew source mixture, and further modifying the components in the mixture

A mixture comprising a polymer obtained by the following process: preparing a mixture by adjusting the composition ratio of each component in the cashew source mixture, and polymerizing the components in the mixture

A mixture comprising a modified polymer obtained by the following process: preparing a mixture by adjusting the composition ratio of the components in the cashew source mixture, modifying the components in the mixture and polymerizing

Modified products obtained by further isolation of the pure substances

Polymers obtained by further polymerizing the pure substances

Modified polymers obtained by further modifying the pure substances and polymerizing them

Here, pure substances include multimers, such as dimers and trimers.

The cardanol compound is preferably at least one compound selected from the group consisting of a polymer obtained by polymerizing a compound represented by formula (CDN1) and a compound represented by formula (CDN1), from the viewpoint of chemical resistance of the resin molded article.

In formula (CDN1), R¹Represents an alkyl group which may have a substituent, or an unsaturated aliphatic group which may have a double bond and may have a substituent. R²Represents a hydroxyl group, a carboxyl group, an alkyl group which may have a substituent, or an unsaturated aliphatic group which may have a double bond and a substituent. P2 represents an integer of 0 to 4. When P2 is 2 or more, a plurality of R's are present²Each may be the same group or different groups.

In formula (CDN1), R¹The alkyl group which may have a substituent(s) represented is preferably an alkyl group having 3 to 30 carbon atoms, more preferably an alkyl group having 5 to 25 carbon atoms, and further preferably an alkyl group having 8 to 20 carbon atoms.

Examples of the substituent include: a hydroxyl group; ether bond-containing substituents such as epoxy group and methoxy group; and substituents containing an ester bond such as acetyl and propionyl.

Examples of the alkyl group which may have a substituent include pentadecn-1-yl, hept-1-yl, oct-1-yl, non-1-yl, decan-1-yl, undecane-1-yl, dodecane-1-yl and tetradecan-1-yl.

In formula (CDN1), R¹The unsaturated aliphatic group having a double bond and which may have a substituent represented by (a) is preferably an unsaturated aliphatic group having 3 to 30 carbon atoms, more preferably an unsaturated aliphatic group having 5 to 25 carbon atoms, and further preferably an unsaturated aliphatic group having 8 to 20 carbon atoms.

The number of double bonds contained in the unsaturated aliphatic group is preferably 1 to 3.

Examples of the substituent include the same substituents as those of the substituent of the alkyl group.

Examples of the unsaturated aliphatic group which has a double bond and may have a substituent include pentadec-8-en-1-yl, pentadec-8, 11-dien-1-yl, pentadec-8, 11, 14-trien-1-yl, pentadec-7-en-1-yl, pentadec-7, 10-dien-1-yl and pentadec-7, 10, 14-trien-1-yl.

In the formula (CDN1), R is¹Pentadecan-8-en-1-yl, pentadecan-8, 11-dien-1-yl, pentadecan-8, 11, 14-trien-1-yl, pentadecan-7-en-1-yl, pentadecan-7, 10-dien-1-yl and pentadecan-7, 10, 14-trien-1-yl are preferred.

In formula (CDN1), represented by R²Preferred examples of the alkyl group which may have a substituent and the unsaturated aliphatic group which may have a double bond and may have a substituent represented by R¹The alkyl group which may have a substituent and the unsaturated aliphatic group which has a double bond and may have a substituent are the same as those represented.

The compound represented by formula (CDN1) may be further modified. For example, it may be epoxidized, and specifically, the compound represented by the formula (CDN1) may be a compound having the following structure: wherein the hydroxyl group of the compound represented by the formula (CDN1) is replaced with the following group (EP), that is, a compound represented by the following formula (CDN 1-e).

In the radicals (EP) and formula (CDN1-e), L_EPRepresents a single bond or a divalent linking group. In the formula (CDN1-e), R¹、R²And P2 each independently with R in formula (CDN1)¹、R²As with P2.

In the radicals (EP) and formula (CDN1-e), L_EPExamples of the divalent linking group represented include an alkylene group (preferably an alkylene group having 1 to 4 carbon atoms, more preferably an alkylene group having 1 carbon atom) which may have a substituent, and-CH₂CH₂OCH₂CH₂-a group.

Examples of substituents include R with formula (CDN1)¹The same substituents as in (1).

As L_EPMethylene is preferred.

The polymer obtained by polymerizing the compound represented by the formula (CDN1) is a polymer obtained by polymerizing at least two or more compounds represented by the formula (CDN1) with or without a linking group.

Examples of the polymer obtained by polymerizing the compound represented by the formula (CDN1) include a compound represented by the formula (CDN 2).

In formula (CDN2), R¹¹、R¹²And R¹³Each independently represents an alkyl group which may have a substituent or an unsaturated aliphatic group which has a double bond and may have a substituent. R²¹、R²²And R²³Each independently represents a hydroxyl group, a carboxyl group, an alkyl group which may have a substituent, or an unsaturated aliphatic group which may have a double bond and may have a substituent. P21 and P23 each independently represent an integer of 0 to 3, and P22 represents an integer of 0 to 2. L is¹And L²Each independently represents a divalent linking group. n represents an integer of 0 to 10. When P21 is 2 or more, a plurality of R's are present²¹May be the same group or different groups; 2 or more at P22In the case of (2), a plurality of R's present²²May be the same group or different groups; when P23 is 2 or more, a plurality of R's are present²³May be the same group or different groups. In the case where n is 2 or more, a plurality of R's are present¹²May be the same group or different groups; in the case where n is 2 or more, a plurality of R's are present²²May be the same group or different groups; in the case where n is 2 or more, a plurality of L's are present¹May be the same group or different groups; in the case where n is 2 or more, the plural P22 present may be the same number or different numbers.

In the formula (CDN2), as represented by R¹¹、R¹²、R¹³、R²¹、R²²And R²³The alkyl group which may have a substituent and the unsaturated aliphatic group which may have a double bond and may have a substituent are represented by R in the formula (CDN1), and R is preferably exemplified¹The same groups are exemplified.

In formula (CDN2), L¹And L²Examples of the divalent linking group represented include alkylene groups (preferably alkylene groups having 2 to 30 carbon atoms, more preferably alkylene groups having 5 to 20 carbon atoms) which may have a substituent.

Examples of substituents include R with formula (CDN1)¹The substituents in (1) are the same as the substituents in (2).

In formula (CDN2), n is preferably 1 to 10, more preferably 1 to 5.

The compound represented by formula (CDN2) may be further modified. For example, it may be epoxidized, and specifically, it may be a compound having the following structure: wherein the hydroxyl group of the compound represented by formula (CDN2) is replaced with a group (EP), that is, a compound represented by the following formula (CDN 2-e).

In the formula (CDN2-e), R¹¹、R¹²、R¹³、R²¹、R²²、R²³、P21、P22、P23、L¹、L²And n is each independently related to R in formula (CDN2)¹¹、R¹²、R¹³、R²¹、R²²、R²³、P21、P22、P23、L¹And L²And n is the same.

In the formula (CDN2-e), L_EP1、L_EP2And L_EP3Each independently represents a single bond or a divalent linking group. In the case where n is 2 or more, a plurality of L's are present_EP2Each may be the same group or different groups.

In the formula (CDN2-e), as represented by L_EP1、L_EP2And L_EP3The divalent linking group represented is preferably exemplified by the group represented by L in the formula (CDN1-e)_EPThe divalent linking groups represented are exemplified by the same groups.

The polymer obtained by polymerizing the compound represented by formula (CDN1) may be, for example, a polymer obtained by three-dimensionally crosslinking and polymerizing at least three or more compounds represented by formula (CDN1) with or without a linking group. Examples of the polymer obtained by three-dimensionally crosslinking and polymerizing the compound represented by formula (CDN1) include a compound represented by the following formula.

In the above formula, R¹⁰、R²⁰And P20 are each related to R in formula (CDN1)¹、R²As with P2. L is¹⁰Represents a single bond or a divalent linking group. Multiple existence of R¹⁰May be the same group or different groups, a plurality of R being present²⁰May be the same group or different groups, and a plurality of L's present¹⁰May be the same group or different groups. The plurality of P20 present may be the same number or a different number.

In the above formula, L¹⁰Examples of the divalent linking group represented include alkylene groups (preferably alkylene groups having 2 to 30 carbon atoms, more preferably alkylene groups having 5 to 20 carbon atoms) which may have a substituent.

SubstitutionExamples of radicals include R with formula (CDN1)¹The substituents in (1) are the same as the substituents in (2).

The compound represented by the above formula may be further modified, for example, it may be epoxidized. Specifically, it may be a compound having the following structure: wherein a hydroxyl group of the compound represented by the above formula is replaced with a group (EP), and examples thereof include a compound represented by the following formula, that is, a polymer obtained by three-dimensionally crosslinking and polymerizing a compound represented by the formula (CDN 1-e).

In the above formula, R¹⁰、R²⁰And P20 are each related to R in formula (CDN1-e)¹、R²As with P2. L is¹⁰Represents a single bond or a divalent linking group. Multiple existence of R¹⁰May be the same group or different groups, a plurality of R being present²⁰May be the same group or different groups, and a plurality of L's present¹⁰May be the same group or different groups. The plurality of P20 present may be the same number or a different number.

In the above formula, L¹⁰Examples of the divalent linking group represented include alkylene groups (preferably alkylene groups having 2 to 30 carbon atoms, more preferably alkylene groups having 5 to 20 carbon atoms) which may have a substituent.

Examples of substituents include R with formula (CDN1)¹The substituents in (1) are the same as the substituents in (2).

The cardanol compound preferably contains a cardanol compound having an epoxy group, and more preferably a cardanol compound having an epoxy group, from the viewpoint of improving chemical resistance of the resin molded product.

As the cardanol compound, a commercially available product can be used. Examples of commercially available products include NX-2024, Ultra LITE 2023, NX-2026, GX-2503, NC-510, LITE 2020, NX-9001, NX-9004, NX-9007, NX-9008, NX-9201, and NX-9203, prepared by Cardolite, and LB-7000, LB-7250, and CD-5L, prepared by Tohoku Chemical Industries, Ltd.

Examples of commercially available products of cardanol compounds with epoxy groups include NC-513, NC-514S, NC-547, LITE513E and Ultra LTE 513 prepared from Cardolite.

From the viewpoint of chemical resistance of the resin molded product, the hydroxyl value of the cardanol compound is preferably 100mgKOH/g or more, more preferably 120mgKOH/g or more, and still more preferably 150mgKOH/g or more. The measurement of the hydroxyl value of the cardanol compound was carried out according to method a of ISO 14900.

In the case of using a cardanol compound having an epoxy group as the cardanol compound, the epoxy equivalent weight is preferably 300 to 500, more preferably 350 to 480, and even more preferably 400 to 470, from the viewpoint of improving the chemical resistance of the resin molded product. The measurement of the epoxy equivalent of the cardanol compound having an epoxy group was performed according to ISO 3001.

-ester compound-

The ester compound as the plasticizer (C) contained in the resin composition of the exemplary embodiment is not particularly limited as long as it is an ester compound other than the compounds represented by formulae (1) to (5).

Examples of the ester compound contained as the plasticizer (C) include dicarboxylic acid diesters, citric acid esters, polyether ester compounds, benzoic acid glycol esters, compounds represented by formula (6), and epoxidized fatty acid esters. Examples of such esters include monoesters, diesters, triesters, and polyesters.

In the formula (6), R⁶¹Represents an aliphatic hydrocarbon group having 7 to 28 carbon atoms, R⁶²Represents an aliphatic hydrocarbon group having 1 to 8 carbon atoms.

As a group consisting of R⁶¹Specific forms and preferred forms of the group represented are exemplified by R in the formula (1)¹¹The specific form and preferred form of the group represented are the same.

R⁶²The group represented may be a saturated aliphatic hydrocarbon group or an unsaturated aliphatic hydrocarbon group,and is preferably a saturated aliphatic hydrocarbon group. R⁶²The group represented may be a linear aliphatic hydrocarbon group, may be a branched aliphatic hydrocarbon group, may be an aliphatic hydrocarbon group containing an alicyclic ring, and is preferably a linear aliphatic hydrocarbon group. R⁶²The group represented may be a group in which a hydrogen atom in the aliphatic hydrocarbon group is substituted with a halogen atom (e.g., a fluorine atom, a bromine atom, and an iodine atom), an oxygen atom, a nitrogen atom, and is preferably an unsubstituted group. R⁶²The group represented preferably has 2 or more carbon atoms, more preferably 3 or more carbon atoms, and further preferably 4 or more carbon atoms.

Specific examples of the ester compound contained as the plasticizer (C) include adipates, citrates, sebacates, azelates, phthalates, acetates, dibasic esters, phosphates, condensed phosphates, glycol esters (e.g., benzoic acid glycol esters), and modified products of fatty acid esters (e.g., epoxidized fatty acid esters). Examples of the above esters include monoesters, diesters, triesters, and polyesters. Among them, dicarboxylic acid diesters (adipic acid diester, sebacic acid diester, azelaic acid diester, phthalic acid diester, etc.) are preferable.

As the plasticizer (C), adipate is preferable. The adipate ester has high affinity with the resin, particularly the cellulose acylate (a), and is dispersed in a state almost uniform with the resin, particularly the cellulose acylate (a), and thus the thermal fluidity is improved more than other plasticizers.

In the ester compound contained as the plasticizer (C) in the resin composition of the exemplary embodiment, the molecular weight (or weight average molecular weight) is preferably 200 to 2000, more preferably 250 to 1500, and further preferably 280 to 1000. The weight average molecular weight of the ester compound is a value measured according to the method for measuring the weight average molecular weight of the cellulose acylate (a), unless otherwise specified.

Examples of adipic acid esters include adipic acid diesters and adipic acid polyesters. Specific examples thereof include adipic acid diesters represented by the formula (AE) and adipic acid polyesters represented by the formula (APE).

In formula (AE), R^AE1And R^AE2Each independently represents an alkyl group or a polyoxyalkyl [ - (C)_xH_2x-O)_y-R^A1](where R is^A1Represents an alkyl group, x represents an integer of 1 to 10, and y represents an integer of 1 to 10).

In formula (APE), R^AE1And R^AE2Each independently being alkyl or polyoxyalkyl [ - (C)_xH_2x-O)_y-R^A1](where R is^A1Represents an alkyl group, x represents an integer of 1 to 10, and y represents an integer of 1 to 10), R^AE3Represents an alkylene group.

m1 represents an integer of 1 to 10, and m2 represents an integer of 1 to 20.

In the formulae (AE) and (APE), R^AE1And R^AE2The alkyl group represented is preferably an alkyl group having 1 to 12 carbon atoms, more preferably an alkyl group having 4 to 10 carbon atoms, and further preferably an alkyl group having 8 carbon atoms. R^AE1And R^AE2The alkyl group represented may be any of a straight-chain alkyl group, a branched alkyl group, and a cyclic alkyl group, and is preferably a straight-chain alkyl group or a branched alkyl group.

In the formulae (AE) and (APE), in R^AE1And R^AE2Polyoxyalkyl [ - (C) of_xH_2x-O)_y-R^A1]In, R^A1The alkyl group represented is preferably an alkyl group having 1 to 6 carbon atoms, more preferably an alkyl group having 1 to 4 carbon atoms. R^A1The alkyl group represented may be any of a straight-chain alkyl group, a branched alkyl group, and a cyclic alkyl group, and is preferably a straight-chain alkyl group or a branched alkyl group.

In formula (APE), R^AE3The alkylene group represented is preferably an alkylene group having 1 to 6 carbon atoms, more preferably an alkylene group having 1 to 4 carbon atoms. The alkylene group may be any of a straight-chain alkyl group, a branched alkyl group, and a cyclic alkyl group, and is preferably a straight-chain alkyl group or a branched alkyl group.

In formula (APE), m1 is preferably an integer of 1 to 5, and m2 is preferably an integer of 1 to 10.

In the formulae (AE) and (APE), the group represented by each symbol may be substituted with a substituent. Examples of the substituent include an alkyl group, an aryl group and a hydroxyl group.

The molecular weight (or weight average molecular weight) of the adipate is preferably 250 to 2000, more preferably 280 to 1500, and further preferably 300 to 1000. The weight average molecular weight of adipate is a value measured according to the method of measuring the weight average molecular weight of cellulose acylate (a).

As the adipate ester, a mixture of the adipate ester with other components may be used. As a commercially available product of the mixture, daicatty 101 manufactured by Daihachi Chemical Industry co., ltd.

As the hydrocarbon group at the terminal of the fatty acid ester (e.g., citrate ester, sebacate ester, azelate diester, phthalate ester, and acetate ester), an aliphatic hydrocarbon group is preferable, and an alkyl group having 1 to 12 carbon atoms is preferable, an alkyl group having 4 to 10 carbon atoms is more preferable, and an alkyl group having 8 carbon atoms is further preferable. The alkyl group may be any of a straight-chain alkyl group, a branched alkyl group, and a cyclic alkyl group, and is preferably a straight-chain alkyl group or a branched alkyl group.

Examples of fatty acid esters (e.g., citric acid esters, sebacic acid esters, azelaic acid diesters, phthalic acid esters, and acetic acid esters) include esters of fatty acids and alcohols. Examples of alcohols include: monohydric alcohols such as methanol, ethanol, propanol, butanol and 2-ethylhexanol; polyhydric alcohols such as glycerin, polyglycerin (diglycerin and the like), pentaerythritol, ethylene glycol, diethylene glycol, propylene glycol, butylene glycol, trimethylolpropane, trimethylolethane and sugar alcohols.

Examples of the diol in the glycol benzoate include ethylene glycol, diethylene glycol, and propylene glycol.

The epoxidized fatty acid ester is an ester compound having a structure in which the carbon-carbon unsaturated bond of the unsaturated fatty acid ester is epoxidized (i.e., oxetane). Examples of epoxidized fatty acid esters include esters of fatty acids and alcohols in which some or all of the carbon-carbon unsaturation in the unsaturated fatty acids (e.g., oleic acid, palmitoleic acid, vaccenic acid, linoleic acid, linolenic acid, and nervonic acid) is epoxidized. Examples of alcohols include: monohydric alcohols such as methanol, ethanol, propanol, butanol and 2-ethylhexanol; polyhydric alcohols such as glycerin, polyglycerin (diglycerin and the like), pentaerythritol, ethylene glycol, diethylene glycol, propylene glycol, butylene glycol, trimethylolpropane, trimethylolethane and sugar alcohols.

Examples of commercially available products of epoxidized fatty acid esters include ADEKA CIZER D-32, D-55, O-130P and O-180A (manufactured by ADEKA CORPORATION), SANSO CIZER E-PS, nE-PS, E-PO, E-4030, E-6000, E-2000H and E-9000H (manufactured by New Japan Chemical Co., Ltd.).

The polyester unit of the polyetherester compound may be aromatic or aliphatic (including alicyclic), and the polyether unit of the polyetherester compound may be aromatic or aliphatic (including alicyclic). The weight ratio of polyester units to polyether units is, for example, 20:80 to 80: 20. The molecular weight (or weight average molecular weight) of the polyetherester compound is preferably 250 to 2000, more preferably 280 to 1500, and further preferably 300 to 1000. Examples of commercially available products of polyether ester compounds include ADEKA CIZER RS-1000 (manufactured by ADEKA CORPORATION).

As the polyether compound having at least one unsaturated bond in the molecule, a polyether compound having an allyl group at the terminal is exemplified, and a polyalkylene glycol allyl ether is preferable. The molecular weight (or weight average molecular weight) of the polyether compound having at least one unsaturated bond in the molecule is preferably 250 to 2000, more preferably 280 to 1500, and further preferably 300 to 1000. Examples of commercially available products of polyether compounds having at least one unsaturated bond in the molecule include polyalkylene glycol allyl ethers such as UNIOX PKA-5006, UNIOX PKA-5008, UNIOL PKA-5014 and UNIOL PKA-5017 (manufactured by NOF CORPORATION).

[ thermoplastic elastomer (D): component (D) ]

From the viewpoint of chemical resistance of the resulting resin molded article, it is preferable that the resin composition of the exemplary embodiment further comprises a thermoplastic elastomer (D) that is at least one thermoplastic elastomer selected from the group consisting of a polymer (D1) having a core-shell structure, a polymer (D2) having a core-shell structure, an olefin polymer (D3), a styrene-ethylene-butadiene-styrene copolymer (D4), polyurethane (D5), and polyester (D6), a polymer (D1) that has a core layer comprising a butadiene polymer and a shell layer comprising a polymer selected from a styrene polymer and an acrylonitrile-styrene polymer on the surface of the core layer, a polymer (D2) that has a core layer and a shell layer comprising a polymer containing an alkyl (meth) acrylate on the surface of the core layer, and an olefin polymer (D3) that is a polymer of α -olefin and an alkyl (meth) acrylate and contains 60% by weight or more of a structural unit derived from the olefin 32- α.

Component (D) is, for example, a thermoplastic elastomer having elasticity at ordinary temperature (25 ℃) and softening properties similar to those of a thermoplastic resin at high temperature.

Among them, the resin composition preferably further contains a thermoplastic elastomer (D) from the viewpoint of chemical resistance of the obtained resin molded article. From the viewpoint of chemical resistance of the resulting resin molded article, the thermoplastic elastomer (D) preferably contains at least one thermoplastic elastomer selected from the group consisting of a polymer (D1) having a core-shell structure, a polymer (D2) having a core-shell structure, a styrene-ethylene-butadiene-styrene copolymer (D4), a polyurethane (D5) and a polyester (D6), wherein the polymer (D1) has a core layer comprising a butadiene polymer and a shell layer comprising a polymer selected from a styrene polymer and an acrylonitrile-styrene polymer on the surface of the core layer, and the polymer (D2) has a core layer and a shell layer comprising a polymer of an alkyl (meth) acrylate on the surface of the core layer; more preferably at least one thermoplastic elastomer selected from the group consisting of a polymer (d1) having a core-shell structure and a polymer (d2) having a core-shell structure, wherein the polymer (d1) has a core layer comprising a butadiene polymer and a shell layer comprising a polymer selected from a styrene polymer and an acrylonitrile-styrene polymer on the surface of the core layer, and the polymer (d2) has a core layer and a shell layer comprising a polymer of an alkyl (meth) acrylate on the surface of the core layer; it is further preferable to contain the polymer (d2) having a core-shell structure, wherein the polymer (d2) has a core layer and a shell layer of a polymer containing an alkyl (meth) acrylate on the surface of the core layer.

In addition, the thermoplastic elastomer (D) is preferably a particulate thermoplastic elastomer from the viewpoint of chemical resistance of the resulting resin molded article. That is, the resin composition of the exemplary embodiment preferably contains thermoplastic elastomer particles as the thermoplastic elastomer (D) from the viewpoint of chemical resistance of the resulting resin molded article.

(Polymer having core-Shell Structure (d 1): component (d1))

The polymer having a core-shell structure (d1) is a polymer having a core-shell structure having a core layer and a shell layer located on the surface of the core layer. The polymer having a core-shell structure (d1) is a polymer having a core layer as the innermost layer and a shell layer as the outermost layer (in particular, a polymer obtained by graft polymerizing a polymer of alkyl (meth) acrylate to a polymer serving as the core layer to obtain a shell layer).

One or more other layers (e.g., 1 to 6 other layers) may be provided between the core layer and the shell layer. The polymer having a core-shell structure (d1) is a polymer obtained by graft-polymerizing a plurality of polymers onto a polymer serving as a core layer to form a multilayered polymer in the case of containing other layers.

Examples of the rubber layer include a (meth) acrylic rubber layer, a silicone rubber layer, a styrene rubber layer, a conjugated diene rubber layer, an α -olefin rubber layer, a nitrile rubber layer, a polyurethane rubber layer, a polyester rubber layer, a polyamide rubber layer, and two or more copolymer rubber layers of these rubbers, wherein the rubber layer is preferably a (meth) acrylic rubber layer, a silicone rubber layer, a styrene rubber layer, a conjugated diene rubber layer, a α -olefin rubber layer, and two or more copolymer rubber layers of these rubbers.

As an example of the (meth) acrylic rubber, there may be mentioned a polymer rubber obtained by polymerizing a (meth) acrylic component (an alkyl ester of (meth) acrylic acid having 2 to 8 carbon atoms, or the like).

Examples of silicone rubbers include rubbers made from polysiloxane components (polydimethylsiloxane, polyphenylsiloxane, etc.).

Examples of the styrene rubber include polymer rubbers obtained by polymerizing styrene components (styrene, α -methylstyrene, etc.).

Examples of the conjugated diene rubber include polymer rubbers obtained by polymerizing conjugated diene components (butadiene, isoprene, etc.).

α -olefin rubber examples include polymer rubbers obtained by polymerizing α -olefin components (ethylene, propylene and 2-methylpropene).

Examples of the copolymer rubber include: a copolymer rubber obtained by polymerizing two or more (meth) acrylic components, a copolymer rubber obtained by polymerizing a (meth) acrylic component and a polysiloxane component, a copolymer rubber obtained by polymerizing a (meth) acrylic component, a conjugated diene component, and a styrene component.

Examples of the alkyl (meth) acrylate among the polymers constituting the shell layer include methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, n-butyl (meth) acrylate, t-butyl (meth) acrylate, n-hexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, cyclohexyl (meth) acrylate, and octadecyl (meth) acrylate. In the alkyl (meth) acrylate, at least a part of hydrogen of the alkyl chain may be substituted. Examples of the substituent include amino, hydroxyl and halogen groups.

Among them, from the viewpoint of easily obtaining a resin molded article having high chemical resistance by adding component (B), preferred as the polymer of the alkyl (meth) acrylate is a polymer of an alkyl (meth) acrylate having an alkyl chain of 1 to 8 carbon atoms, more preferred is a polymer of an alkyl (meth) acrylate having an alkyl chain of 1 or 2 carbon atoms, and further preferred is a polymer of an alkyl (meth) acrylate having an alkyl chain of 1 carbon atom.

The polymer constituting the shell layer may be a polymer obtained by polymerizing at least one selected from the group consisting of a glycidyl group-containing vinyl compound and an unsaturated dicarboxylic anhydride, and an alkyl (meth) acrylate.

Examples of the glycidyl group-containing vinyl compound include glycidyl (meth) acrylate, glycidyl itaconate, diglycidyl itaconate, allyl glycidyl ether, styrene-4-glycidyl ether, and 4-glycidylstyrene.

Examples of the unsaturated dicarboxylic acid anhydride include maleic anhydride, itaconic anhydride, glutaconic anhydride, citraconic anhydride and aconitic anhydride. Among them, maleic anhydride is preferable.

In the case where other layers are provided between the core layer and the shell layer, examples of the other layers include polymer layers described for the shell layer.

The weight ratio of the shell layer is preferably 1 to 40% by weight, more preferably 3 to 30% by weight, and further preferably 5 to 15% by weight, relative to the entire core-shell structure.

The average primary particle diameter of the polymer having a core-shell structure is not particularly limited, and is preferably from 50nm to 500nm, more preferably from 50nm to 400nm, further preferably from 100nm to 300nm, and particularly preferably from 150nm to 250nm, from the viewpoint of easily obtaining the effect of improving toughness by adding component (B). The average primary particle diameter refers to a value measured by the following method.

The average primary particle diameter is a number average primary particle diameter which is an average of primary particle diameters of 100 particles. The primary particle diameters are each the maximum diameter in each primary particle, and are measured by observing the particles with a scanning electron microscope. Specifically, the average primary particle diameter is obtained by observing the polymer having a core-shell structure in a dispersed form in the resin composition with a scanning electron microscope.

The polymer having a core-shell structure (d1) can be prepared by known methods.

As a known method, an emulsion polymerization method can be mentioned. Specifically, the following method is exemplified as the preparation method. First, a core particle (core layer) is prepared by emulsion polymerization of a monomer mixture, and then a mixture of other monomers is emulsion polymerized in the presence of the core particle (core layer) to form a polymer having a core-shell structure in which a shell layer is formed around the core particle (core layer). In the case where other layers are formed between the core layer and the shell layer, emulsion polymerization of a mixture of other monomers is repeatedly performed to obtain a polymer having a core-shell structure composed of the objective core layer, other layers, and shell layer.

Examples of commercially available products of the polymer having a core-shell structure (d1) include "METABLEN" (registered trademark) manufactured by Mitsubishi Chemical Corporation, "KANE ACE" (registered trademark) manufactured by Kaneka Corporation, "PARALOID" (registered trademark) manufactured by Dow Chemical Japan Limited, "STAPHYLOID" (registered trademark) manufactured by Aica Kogyo company Limited, and "PARAFACE" (registered trademark) manufactured by KURAY Co., Ltd.

(Polymer having core-Shell Structure (d 2): component (d2))

The polymer having a core-shell structure (d2) is a polymer having a core-shell structure having a core layer and a shell layer on the surface of the core layer.

The polymer having a core-shell structure (d2) is a polymer having a core layer as the innermost layer and a shell layer as the outermost layer (in particular, a polymer obtained by graft polymerizing a styrene polymer or an acrylonitrile-styrene polymer to a core layer containing a butadiene polymer to form a shell layer).

One or more other layers (e.g., 1 to 6 other layers) may be provided between the core layer and the shell layer. In the case where one or more other layers are provided between the core layer and the shell layer, the polymer having a core-shell structure (d2) is a polymer obtained by graft polymerizing a plurality of polymers onto the polymer serving as the core layer to form a multilayered polymer.

The core layer containing a butadiene polymer is not particularly limited as long as it is a polymer obtained by polymerizing a butadiene-containing component, and may be a core layer of a butadiene homopolymer, but also a core layer of a copolymer of butadiene and other monomers, examples of the other monomers include vinyl aromatic compounds, among vinyl aromatic compounds, styrene components such as styrene, alkyl-substituted styrene (e.g., α -methylstyrene, 2-methylstyrene, 3-methylstyrene, 4-methylstyrene, 2-ethylstyrene, 3-ethylstyrene and 4-ethylstyrene) and halogen-substituted styrene (e.g., 2-chlorostyrene, 3-chlorostyrene and 4-chlorostyrene) may be used, styrene components may be used alone or in combination of two or more.

In particular, the core layer containing a butadiene polymer may be, for example, a homopolymer of butadiene, may be a copolymer of butadiene and styrene, or may be a terpolymer of butadiene, styrene and divinylbenzene.

In the butadiene polymer contained in the core layer, the proportion of the structural unit derived from butadiene is preferably 60% by weight to 100% by weight (preferably 70% by weight to 100% by weight), and the proportion of the structural unit derived from the other monomer (preferably styrene component) is preferably 0% by weight to 40% by weight (preferably 0% by weight to 30% by weight). For example, as the proportion of the structural unit derived from each monomer constituting the butadiene polymer, butadiene is 60 to 100% by weight, styrene is 0 to 40% by weight, and divinylbenzene may be contained in an amount of 0 to 5% by weight of the total amount of styrene and divinylbenzene.

The shell layer containing the styrene polymer is not particularly limited as long as the shell layer contains a polymer obtained by polymerizing a styrene component, and may be a shell layer of a styrene homopolymer or a copolymer of styrene and other monomers. Examples of the styrene component include the same components as those exemplified for the core layer. Examples of the other monomers include alkyl (meth) acrylates (e.g., methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, n-butyl (meth) acrylate, t-butyl (meth) acrylate, n-hexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, cyclohexyl (meth) acrylate, and octadecyl (meth) acrylate). In the alkyl (meth) acrylate, at least a part of hydrogen of the alkyl chain may be substituted. Examples of the substituent include amino, hydroxyl and halogen groups. The alkyl (meth) acrylate may be used alone or in combination of two or more. As other monomers, polyfunctional monomers such as allyl (meth) acrylate, triallyl isocyanurate, and divinylbenzene may be used.

The styrene polymer contained in the shell layer may be a copolymer of 85 to 100% by weight of a styrene component and 0 to 15% by weight of other monomer components (preferably, alkyl (meth) acrylate).

Among them, the styrene polymer contained in the shell layer is preferably a copolymer of styrene and an alkyl (meth) acrylate, from the viewpoint that a resin composition having high chemical resistance is easily obtained by adding component (B). From the same viewpoint, a copolymer of styrene and an alkyl (meth) acrylate having an alkyl chain of 1 to 8 carbon atoms is preferable, and a polymer of an alkyl (meth) acrylate having an alkyl chain of 1 to 4 carbon atoms is more preferable.

The shell layer containing the acrylonitrile-styrene polymer is a shell layer containing a copolymer of an acrylonitrile component and a styrene component. The acrylonitrile-styrene polymer is not particularly limited, and examples thereof include known acrylonitrile-styrene polymers. Examples of the acrylonitrile-styrene polymer include a copolymer of 10 to 80% by weight of an acrylonitrile component and 20 to 90% by weight of a styrene component. Examples of the styrene component copolymerized with the acrylonitrile component include the same components as the styrene component exemplified for the core layer. As the acrylonitrile-styrene polymer contained in the shell layer, polyfunctional monomers such as allyl (meth) acrylate, triallyl isocyanurate, and divinylbenzene can be used.

In the case where other layers are provided between the core layer and the shell layer, examples of the other layers include the polymer layers described for the shell layer.

The weight ratio of the shell layer is preferably 1 to 40% by weight, more preferably 3 to 30% by weight, and further preferably 5 to 15% by weight, relative to the entire core-shell structure.

Among the components (d2), examples of commercially available products of the core-shell structured polymer (d2) having a core layer comprising a butadiene polymer and a shell layer containing a styrene polymer on the surface of the core layer include "METABLEN" (registered trademark) manufactured by Mitsubishi Chemical Corporation, "KANE ACE" (registered trademark) manufactured by Kaneka Corporation, "Clearstrength" (registered trademark) manufactured by Arkema, and "PARALOID" (registered trademark) manufactured by Dow Chemical Japan Limited. Among the components (d2), examples of commercially available products of the core-shell structured polymer (d2) having a core layer comprising a butadiene polymer and a shell layer containing an acrylonitrile-styrene polymer on the surface of the core layer include "blendex" (registered trademark) prepared by Galata Chemicals and "ELIX" prepared by ELIX POLYMERS.

The average primary particle diameters of the polymer having a core-shell structure (d1) and the polymer having a core-shell structure (d2) are not particularly limited, and are preferably 50nm to 500nm, more preferably 50nm to 400nm, further preferably 100nm to 300nm, and particularly preferably 150nm to 250nm, from the viewpoint of chemical resistance of the resulting resin molded article.

The average primary particle diameter refers to a value measured by the following method. The average primary particle diameter is a number average primary particle diameter which is an average of primary particle diameters of 100 particles. Each primary particle diameter is the maximum diameter in each primary particle, and is measured by observing the particles with a scanning electron microscope. Specifically, the average primary particle diameter is obtained by observing the polymer having a core-shell structure in a dispersed form in the resin composition with a scanning electron microscope.

(olefin Polymer (d 3): component (d3))

The olefin polymer (d3) is a polymer of α -olefin and alkyl (meth) acrylate, and is preferably an olefin polymer containing 60% by weight or more of a structural unit derived from α -olefin.

Among the olefin polymers, α -olefins are exemplified by ethylene, propylene and 2-methylpropene from the viewpoint of chemical resistance of the resulting resin molded article, α -olefins having 2 to 8 carbon atoms are preferred, α -olefins having 2 or 3 carbon atoms are more preferred, of which ethylene is more preferred.

Examples of the alkyl (meth) acrylate polymerized with α -olefin include methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, n-butyl (meth) acrylate, t-butyl (meth) acrylate, n-hexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, cyclohexyl (meth) acrylate, and octadecyl (meth) acrylate, from the viewpoint of chemical resistance of the resulting resin molded product, preferred are alkyl (meth) acrylates having an alkyl chain of 1 to 8 carbon atoms, more preferred are alkyl (meth) acrylates having an alkyl chain of 1 to 4 carbon atoms, and further preferred are alkyl (meth) acrylates having an alkyl chain of 1 or 2 carbon atoms.

The olefin polymer is preferably a polymer of ethylene and methyl acrylate from the viewpoint of chemical resistance of the resulting resin molded article.

From the viewpoint of chemical resistance of the resulting resin molded article, in the olefin polymer, the structural unit derived from α -olefin is preferably 60 to 97% by weight, more preferably 70 to 85% by weight.

The olefin polymer may have other structural units in addition to the structural unit derived from α -olefin and the structural unit derived from alkyl (meth) acrylate, here, the other structural units may be 10% by weight or less with respect to the entire structural units in the olefin polymer.

(styrene-ethylene-butadiene-styrene copolymer (d 4): component (d4))

The copolymer (d4) is not particularly limited as long as it is a thermoplastic elastomer, and examples thereof include known styrene-ethylene-butadiene-styrene copolymers. The copolymer (d4) may be a styrene-ethylene-butadiene-styrene copolymer and a hydrogenated product thereof.

The copolymer (d4) is preferably a hydrogenated product of a styrene-ethylene-butadiene-styrene copolymer from the viewpoint of chemical resistance of the resulting resin molded article. From the same viewpoint, the copolymer (d4) may be a block copolymer, for example, it is preferably a copolymer having styrene block portions at both ends and having an ethylene/butylene block portion in the middle due to hydrogenation of at least a part of the double bonds of the butadiene portion (a triblock copolymer of styrene-ethylene/butylene-styrene). The ethylene/butylene block portion of the styrene-ethylene/butylene-styrene copolymer may be a random copolymer.

The copolymer (d4) is obtained by known methods. In the case where the copolymer (d4) is a hydrogenated product of a styrene-ethylene-butadiene-styrene copolymer, for example, the copolymer is obtained by hydrogenating the butadiene moiety of a styrene-butadiene-styrene block copolymer in which the conjugated diene moiety is composed of 1,4 bonds.

Examples of commercially available products of the copolymer (d4) include "Kraton" (registered trademark) manufactured by Kraton Corporation and "Septon" (registered trademark) manufactured by KURARAY co.

(polyurethane (d 5): component (d5))

The polyurethane (d5) is not particularly limited as long as it is a thermoplastic elastomer, and examples thereof include known polyurethanes. The polyurethane (d5) is preferably a linear polyurethane. The polyurethane (d5) can be obtained, for example, by reacting a polyol component (polyether polyol, polyester polyol, polycarbonate polyol, etc.), an organic isocyanate component (aromatic diisocyanate, aliphatic (including alicyclic) diisocyanate, etc.), and, if necessary, a chain extender (aliphatic (including alicyclic) diol, etc.). The polyol component may be used alone or in combination of two or more; the organic isocyanate component may be used alone or in combination of two or more.

The polyurethane (d5) is preferably an aliphatic polyurethane from the viewpoint of chemical resistance of the resulting resin molded article. As the aliphatic polyurethane, for example, an aliphatic polyurethane obtained by reacting a polyol component containing a polycarbonate polyol with an isocyanate component containing an aliphatic diisocyanate is preferable.

The polyurethane (d5) can be obtained by the following process: the polyol component is reacted with the organic isocyanate component such that the NCO/OH ratio in the raw materials when synthesizing the polyurethane is in the range of, for example, 0.90 to 1.5. The polyurethane (d5) is obtained by known methods, such as the one shot (one shot) method and the prepolymerization method.

Examples of commercially available products of polyurethane (d5) include "Estane" (registered trademark) manufactured by Lubrizol and "Elastollan" (registered trademark) manufactured by BASF. Also exemplified is "Desmopan" (registered trademark) manufactured by Bayer corporation.

(polyester (d 6): component (d6))

The polyester (d6) is not particularly limited as long as it is a thermoplastic elastomer, and examples thereof include known polyesters. The polyester (d6) is preferably an aromatic polyester from the viewpoint of chemical resistance of the resulting resin molded article. In an exemplary embodiment, the aromatic polyester means a polyester having an aromatic ring in its structure.

Examples of the polyester (d6) include polyester copolymers (polyetheresters, polyesteresters, etc.). Specific examples thereof include: a polyester copolymer having a hard segment composed of a polyester unit and a soft segment composed of a polyester unit; a polyester copolymer having a hard segment composed of polyester units and a soft segment composed of polyether units; and a polyester copolymer having a hard segment composed of polyester units and a soft segment composed of polyether units and polyester units. The weight ratio of the hard segment of the polyester copolymer to the soft segment of the polyester copolymer (hard segment/soft segment) may be, for example, 20/80 to 80/20. The polyester units constituting the hard segment and the polyester units and polyether units constituting the soft segment may be aromatic or aliphatic (including alicyclic).

The polyester copolymer as the polyester (d6) is obtained using a known method. The polyester copolymer is preferably a linear polyester copolymer. The polyester copolymer is obtained, for example, by the following method: a method of esterifying or transesterifying a dicarboxylic acid component having 4 to 20 carbon atoms, a diol component having 2 to 20 carbon atoms, and a polyalkylene glycol component having a number-average molecular weight of 300 to 20000 (including alkylene oxide adducts of polyalkylene glycols); and a method of esterifying or transesterifying these components to produce an oligomer and then polycondensing the oligomer. Further, for example, there can be exemplified a method of esterifying or transesterifying a dicarboxylic acid component having 4 to 20 carbon atoms, a diol component having 2 to 20 carbon atoms and an aliphatic polyester component having a number average molecular weight of 300 to 20000. The dicarboxylic acid component is an aromatic or aliphatic dicarboxylic acid or an ester derivative thereof, the diol component is an aromatic or aliphatic diol, and the polyalkylene glycol component is an aromatic or aliphatic polyalkylene glycol.

Among them, the dicarboxylic acid component of the polyester copolymer is preferably a dicarboxylic acid component having an aromatic ring, from the viewpoint of chemical resistance of the resulting resin molded article. The diol component and the polyalkylene glycol component each preferably use an aliphatic diol component and an aliphatic polyalkylene glycol component.

Examples of commercially available products of the polyester (d6) include "perprene" (registered trademark) manufactured by Toyobo co., ltd., and "HYTREL" (registered trademark) manufactured by Du Pont-Toray co., ltd.).

The thermoplastic elastomer (D) may be used alone or in combination of two or more.

[ contents or content ratios of the above-mentioned respective Components ]

The resin composition of the exemplary embodiment contains a resin having a carbon atom derived from biomass (component (a), etc.), and also contains component (B), component (C), and component (D), as well as other component (E) described below, as necessary. The content or content ratio of each component of the resin composition of the exemplary embodiment is preferably within the following range (all on a mass basis) from the viewpoint of chemical resistance of the resulting resin molded article.

Abbreviations for the respective components are as follows.

Component (A) ═ cellulose acylate (A)

Component (B) ═ ester compound (B)

Component (C) is plasticizer (C)

Component (D) ═ thermoplastic elastomer (D)

In the resin composition of the exemplary embodiment, the content of the resin having carbon atoms derived from biomass is preferably 50% by weight or more, more preferably 60% by weight or more, and further preferably 70% by weight or more, with respect to the total mass of the resin composition.

In the resin composition of the exemplary embodiment, the content of the component (a) is preferably 50% by weight or more, more preferably 60% by weight or more, and further preferably 70% by weight or more, relative to the total mass of the resin composition. In addition, the content of the component (a) in the resin composition of the exemplary embodiment is preferably 50 parts by mass or more, more preferably 80 parts by mass or more, and further preferably 95 to 100 parts by mass, relative to 100 parts by mass of the content of the resin having a carbon atom derived from biomass.

In the resin composition of the exemplary embodiment, the content of the component (B) is preferably 0.1 to 15% by weight, more preferably 0.5 to 10% by weight, and further preferably 1 to 5% by weight, relative to the total mass of the resin composition.

In the resin composition of the exemplary embodiment, the content of the component (C) is preferably 0.01 to 5% by weight, more preferably 1 to 25% by weight, further preferably 3 to 20% by weight, and most preferably 5 to 15% by weight, relative to the total mass of the resin composition.

In the resin composition of the exemplary embodiment, the content of the component (D) is preferably 1 to 20% by weight, more preferably 3 to 15% by weight, and further preferably 5 to 10% by weight, relative to the total mass of the resin composition.

Component (B) with resin (A) having biomass-derived carbon atoms^Bio) The content ratio of (B) is preferably 0.0025. ltoreq. (B/A)^Bio) 0.1 or less, more preferably 0.003 or less (B/A)^Bio) 0.095 or less, more preferably 005 or less (B/A)^Bio)≤0.05。

Further, the content ratio of the component (B) to the component (A) is preferably 0.0025. ltoreq. B/A.ltoreq.0.1, more preferably 0.003. ltoreq. B/A.ltoreq.0.095, further preferably 0.005. ltoreq. B/A.ltoreq.0.05.

Component (C) with resin (A) having biomass-derived carbon atoms^Bio) The content ratio of (A) is preferably 0.03. ltoreq. (C/A)^Bio) 0.3 or less, more preferably 0.05 or less (C/A)^Bio) 0.2 or less, preferably 0.07 or less (C/A)^Bio)≤0.15。

Further, the content ratio of the component (C) to the component (A) is preferably 0.05. ltoreq. C/A.ltoreq.0.3, more preferably 0.05. ltoreq. C/A.ltoreq.0.2, further preferably 0.07. ltoreq. C/A.ltoreq.0.3.

Component (D) and resin (A) having biomass-derived carbon atoms^Bio) The content ratio of (B) is preferably 0.025. ltoreq. (D/A)^Bio) 0.3 or less, more preferably 0.05 or less (D/A)^Bio) 0.2 or less, preferably 0.07 or less (D/A)^Bio)≤0.1。

Further, the content ratio of the component (D) to the component (A) is preferably 0.025. ltoreq. D/A. ltoreq.0.3, more preferably 0.05. ltoreq. D/A. ltoreq.0.2, still more preferably 0.07. ltoreq. D/A. ltoreq.0.1.

[ other component (E) ]

The resin composition of the exemplary embodiment may include other component (E) (component (E)). In the case where the other component (E) is contained, the total content of the other component (E) is preferably 15% by weight or less, more preferably 10% by weight or less, with respect to the total content of the resin composition.

Examples of the other component (E) include flame retardants, compatibilizers, oxidation inhibitors, stabilizers, antiblocking agents, light stabilizers, weather-resistant agents, colorants, pigments, modifiers, drip inhibitors, antistatic agents, hydrolysis inhibitors, fillers, reinforcing agents (e.g., glass fibers, carbon fibers, talc, clay, mica, glass flakes, milled glass, glass beads, crystalline silica, alumina, silicon nitride, aluminum nitride and boron nitride), acid acceptors for preventing acetic acid release (e.g., oxides such as magnesium oxide and alumina, metal hydroxides such as magnesium hydroxide, calcium hydroxide, aluminum hydroxide and aluminum magnesium carbonate, calcium carbonate and talc), reactive trapping agents (e.g., epoxy compounds, acid anhydride compounds and carbodiimides).

The content of each of the other components (E) is preferably 0% by weight to 5% by weight with respect to the total amount of the resin composition. Here, "0% by weight" means that no other component (E) is contained.

The resin composition of the exemplary embodiment may contain other resins as the other component (E) in addition to the resin having a carbon atom derived from biomass (component (a), etc.), the component (B), the component (C), and the component (D). However, when other resin is contained, the content of the other resin is preferably 5% by weight or less, and more preferably less than 1% by weight, based on the total amount of the resin composition. It is particularly preferred that no other resin (i.e., 0 wt%) is present in the resin composition.

Examples of the other resins include thermoplastic resins in the related art, and specific examples thereof include: a polycarbonate resin; a polypropylene resin; a polyester resin; a polyolefin resin; a polyester carbonate resin; a polyphenylene ether resin; polyphenylene sulfide resin; polysulfone resin; polyether sulfone resin; a polyarylene resin; a polyetherimide resin; a polyacetal resin; a polyvinyl acetal resin; a polyketone resin; a polyetherketone resin; polyether ether ketone resin; a polyaryl ketone resin; a polyether nitrile resin; a liquid crystal resin; a polybenzimidazole resin; a polyaspartic acid resin; a vinyl polymer or copolymer obtained by polymerizing or copolymerizing one or more vinyl monomers selected from the group consisting of aromatic alkenyl compounds, methacrylates, acrylates, and vinyl cyanide compounds; a diene-aromatic alkenyl compound copolymer; vinyl cyanide-diene-aromatic alkenyl compound copolymer; aromatic alkenyl-diene-vinyl cyanide-N-phenylmaleimide copolymer; ethylene cyanide- (ethylene-diene-propylene (EPDM)) -aromatic alkenyl compound copolymers; vinyl chloride resin; and chlorinated vinyl chloride resins.

These resins may be used alone or in combination of two or more.

The polyester as the other component (E) may contain an aliphatic polyester (E2). Examples of the aliphatic polyester (e1) include polymers of hydroxyalkanoates (hydroxyalkanoic acids), polycondensates of polycarboxylic acids and polyhydric alcohols, ring-opening polycondensates of cyclic lactams, and polymers obtained by polymerizing lactic acid with an ester bond.

Further, the resin composition of the exemplary embodiment preferably contains an oxidation inhibitor or a stabilizer as the other component (E). The oxidation inhibitor or stabilizer preferably contains at least one compound (e3) selected from the group consisting of hindered phenol compounds, tocopherol compounds, tocotrienol compounds, phosphite compounds and hydroxylamine compounds.

The compound (e3) may be used alone or in combination of two or more, but it is preferably used in combination of two or more from the viewpoint of the steel ball drop impact strength of the resulting resin molded article. The form in which two or more kinds are used in combination may be any of the following forms: two or more species in the same class are used in combination (for example, two or more hindered phenol compounds), and two or more species in different classes are used in combination (for example, hindered phenol compounds and tocopherol compounds).

From the viewpoint of the steel ball drop impact strength of the resulting resin molded article, the form in which two or more kinds are used in combination is preferably a form in which at least one selected from the group consisting of hindered phenol compounds and hydroxylamine compounds is used in combination with phosphite compounds, and more preferably a form in which hindered phenol compounds and phosphite compounds are used in combination.

In the resin composition of the exemplary embodiment, the content of the compound (e3) is preferably 0.01 to 5% by weight, more preferably 0.05 to 2% by weight, and further preferably 0.1 to 1% by weight, relative to the total mass of the resin composition.

Specific examples of the compound (e3) include: hindered phenol compounds such as "Irganox 1010", "Irganox 245" and "Irganox 1076" manufactured by BASF, "ADK STAB AO-80", "ADKSTAB AO-60", "ADK STAB AO-50", "ADK STAB AO-40", "ADK STAB AO-30", "ADK STAB AO-20" and "ADK STAB AO-330" manufactured by ADEKA CORPORATION, "Sumilizer GA-80", "Sumilizer GM" and "Sumilizer GS" manufactured by Sumitomo Chemical Company, Limited; phosphite compounds such as "Irgafos 38" (bis (2, 4-di-tert-butyl-6-methylphenyl) -ethyl-phosphite), "Irgafos 168", "Irgafos TNPP" and "Irgafos P-EPQ", manufactured by BASF; and hydroxylamine compounds such as "Irgastab FS-042" manufactured by BASF.

Further, specific examples of the tocopherol compound in the compound (e3) include the following compounds.

Further, specific examples of the tocotrienol compound in compound (e3) include the following compounds.

[ method for preparing resin composition ]

Examples of the method of preparing the resin composition of the exemplary embodiment include: a method of mixing and melt-kneading a resin having a carbon atom derived from biomass (component (a) and the like) and, if necessary, component (B), component (C), component (D) and other component (E); and a method of dissolving the resin having a carbon atom derived from biomass (component (a) and the like) and, if necessary, component (B), component (C), component (D) and other component (E) in a solvent. The melt kneading means is not particularly limited, and examples thereof include a twin-screw extruder, a HENSCHEL mixer, a BANBURY mixer, a single-screw extruder, a multi-screw extruder, and a co-kneader.

< resin molded article >

The resin molded article of the exemplary embodiment includes the resin composition of the exemplary embodiment. That is, the resin molded article of the exemplary embodiment has the same composition as the resin composition of the exemplary embodiment.

Injection molding is preferable as a molding method of the resin molded article of the exemplary embodiment from the viewpoint of high degree of freedom in shape. Therefore, the resin molded article of the exemplary embodiment is preferably an injection molded article obtained by injection molding from the viewpoint that the degree of freedom of shape is high.

The cylinder temperature at the time of injection molding of the resin molded article of the exemplary embodiment is preferably, for example, 160 ℃ to 280 ℃, more preferably 180 ℃ to 240 ℃. The mold temperature at the time of injection molding of the resin molded article of the exemplary embodiment is preferably, for example, 40 ℃ to 90 ℃, more preferably 40 ℃ to 60 ℃.

Injection molding of the resin molded article of the exemplary embodiment may be performed using commercially available equipment, such as NEX500(Nissei Plastic Industrial co., Ltd.), NEX150(Nissei Plastic Industrial co., Ltd.), NEX7000 (manufactured by Nissei Plastic Industrial co., Ltd.), PNX40 (manufactured by Nissei Plastic Industrial co., Ltd.), and SE50D (manufactured by Sumitomo health Industries, Ltd.).

The molding method for obtaining the resin molded article of the exemplary embodiment is not limited to the above injection molding, and for example, extrusion molding, blow molding, hot press molding, calender molding, coating molding, cast molding, dip molding, vacuum molding, transfer molding, and the like may also be used.

The resin molded article of the exemplary embodiment is suitable for applications such as electronic and electric appliances, office equipment, home appliances, automobile interior materials, toys, and containers. Specific applications of the resin molded article of the exemplary embodiment include: housings for electronic and electrical equipment or household appliances; various components of electronic and electrical equipment or household appliances; an automotive interior component; assembling the toy; a plastic mold kit; CD-ROM or DVD storage boxes; tableware; beverage bottles; a food tray; a wrapping material; a film; and a sheet.