阅读说明：本技术 氯乙烯树脂组合物、氯乙烯树脂组合物的制造方法、氯乙烯树脂成型体及层叠体 (Vinyl chloride resin composition, method for producing vinyl chloride resin composition, vinyl chloride resin molded article, and laminate ) 是由 高桥和也 于 2019-03-26 设计创作，主要内容包括：本发明的目的在于提供一种氯乙烯树脂组合物,其能够形成降低了臭气成分产生量的氯乙烯树脂成型体。本发明的氯乙烯树脂组合物是包含(a)氯乙烯树脂及(b)化学吸附型消臭剂的氯乙烯树脂组合物,上述(b)化学吸附型消臭剂的耐热温度为150℃以上,上述(b)化学吸附型消臭剂的体积平均粒径为0.5μm以上且10μm以下。上述(b)化学吸附型消臭剂优选包含选自镁、铝、硅及锆中的至少1种元素的氧化物和/或氢氧化物。(The invention aims to provide a vinyl chloride resin composition which can form a vinyl chloride resin forming body with reduced generation amount of odor components. The vinyl chloride resin composition of the present invention is a vinyl chloride resin composition comprising (a) a vinyl chloride resin and (b) a chemisorption deodorant, wherein the heat-resistant temperature of the chemisorption deodorant (b) is 150 ℃ or higher, and the volume average particle diameter of the chemisorption deodorant (b) is 0.5 μm or more and 10 μm or less. The (b) chemisorption type deodorant preferably contains an oxide and/or hydroxide of at least 1 element selected from magnesium, aluminum, silicon and zirconium.)

1. A vinyl chloride resin composition comprising (a) a vinyl chloride resin and (b) a chemisorption type deodorant,

the heat-resistant temperature of the chemical adsorption type deodorant is more than 150 ℃,

the volume average particle diameter of the chemisorption deodorant (b) is 0.5 to 10 [ mu ] m.

2. The vinyl chloride resin composition according to claim 1, wherein the (b) chemisorption deodorant contains an oxide and/or hydroxide of at least 1 element selected from the group consisting of magnesium, aluminum, silicon and zirconium.

3. The vinyl chloride resin composition according to claim 1 or 2, wherein the (b) chemisorption deodorant comprises a hydrazide compound and/or an amine compound.

4. The vinyl chloride resin composition according to claim 3, wherein the (b) chemisorption deodorant further comprises zirconium oxide.

5. The vinyl chloride resin composition according to any one of claims 1 to 4, wherein the content of the (b) chemisorption deodorant is 0.5 parts by mass or more and 10 parts by mass or less with respect to 100 parts by mass of the (a) vinyl chloride resin.

6. The vinyl chloride resin composition according to any one of claims 1 to 5, which is used for powder molding.

7. The vinyl chloride resin composition according to claim 6, which is used for powder slush molding.

8. A process for producing a vinyl chloride resin composition comprising a vinyl chloride resin and a chemisorption type deodorant,

the heat-resistant temperature of the chemical adsorption type deodorant is more than 150 ℃,

the volume average particle diameter of the chemical adsorption type deodorant is more than 0.5 mu m and less than 10 mu m,

the vinyl chloride resin composition includes a release agent,

the manufacturing method comprises the following steps:

a step (A) for preparing a composition (X) containing the components of the vinyl chloride resin composition, excluding the chemisorption type deodorant and the release agent;

a step B of adding the release agent to the composition (X); and

a step C1 of adding a chemisorption type deodorant to the composition (X) simultaneously with the step B; or a step C2 of adding the chemisorption deodorant to the composition (Y) after the composition (Y) is obtained in the step B.

9. A vinyl chloride resin molded article obtained by molding the vinyl chloride resin composition according to any one of claims 1 to 7.

10. The vinyl chloride resin molded body according to claim 9, which is used for a skin of an automotive interior part.

11. A laminate comprising a foamed polyurethane molded article and the vinyl chloride resin molded article according to claim 9 or 10.

Technical Field

The present invention relates to a vinyl chloride resin composition, a method for producing a vinyl chloride resin composition, a vinyl chloride resin molded article, and a laminate.

Background

Vinyl chloride resins are generally used in various applications because of their excellent properties such as cold resistance, heat resistance, and oil resistance.

Specifically, for example, in the formation of automotive interior parts such as automobile instrument panels, automotive interior materials such as a skin formed of a vinyl chloride resin molded article and a laminate in which a foam such as a foamed polyurethane molded article is lined with a skin formed of a vinyl chloride resin molded article are used.

The vinyl chloride resin molded article used as the skin can be produced by molding a vinyl chloride resin composition containing a vinyl chloride resin and a plasticizer by a known molding method such as powder slush molding (see, for example, patent document 1).

Disclosure of Invention

Problems to be solved by the invention

Here, when a vinyl chloride resin molded product is used as an automobile interior material such as a skin of an automobile interior member, the following problems arise: odor components such as aldehyde gas are generated from the vinyl chloride resin molded article, and may give a feeling of discomfort to passengers of the automobile. Therefore, it is required to reduce the amount of odor components generated from the vinyl chloride resin molded product.

Accordingly, an object of the present invention is to provide a vinyl chloride resin molded article in which the amount of odor components generated is reduced.

Another object of the present invention is to provide a vinyl chloride resin composition capable of forming a vinyl chloride resin molded article with a reduced amount of odor components, and a laminate having the vinyl chloride resin molded article.

Means for solving the problems

The present inventors have conducted intensive studies in order to solve the above problems. Then, the present inventors have found that a vinyl chloride resin molded article having a reduced amount of odor components can be formed by using a vinyl chloride resin composition containing a vinyl chloride resin and a chemisorption type deodorant having a heat-resistant temperature and a volume average particle diameter within predetermined ranges, and have completed the present invention.

That is, the present invention has been made to solve the above problems advantageously, and a vinyl chloride resin composition of the present invention is a vinyl chloride resin composition comprising (a) a vinyl chloride resin and (b) a chemisorption deodorant, wherein the chemisorption deodorant (b) has a heat-resistant temperature of 150 ℃ or higher, and the chemisorption deodorant (b) has a volume average particle diameter of 0.5 μm or more and 10 μm or less. Thus, if a vinyl chloride resin composition comprising (a) a vinyl chloride resin and (b) a chemisorption type deodorant having a heat-resistant temperature and a volume average particle diameter in predetermined ranges is used, a vinyl chloride resin molded product having a reduced amount of odor components can be formed.

In the present invention, the "volume average particle diameter of the chemisorption deodorant" means a particle diameter (D50) at which the cumulative volume calculated from the small diameter side in the particle size distribution (volume basis) obtained by the laser diffraction method reaches 50%.

In the present invention, the "heat-resistant temperature of the chemisorption deodorant" means the highest temperature in the range of the heating temperature at which the deodorant performance can be maintained even after the chemisorption deodorant is heated.

In the vinyl chloride resin composition of the present invention, the (b) chemisorption type deodorant preferably contains an oxide and/or hydroxide of at least 1 element selected from magnesium, aluminum, silicon and zirconium. If the above-mentioned (b) chemisorption type deodorant contains the oxide and/or hydroxide of the above-mentioned predetermined element, the amount of odor component generated from a vinyl chloride resin molded product formed using a vinyl chloride resin composition can be further reduced.

In the vinyl chloride resin composition of the present invention, the above-mentioned (b) chemisorption type deodorant preferably contains a hydrazide compound and/or an amine compound, and more preferably further contains zirconium oxide. If the chemisorption type deodorant (b) contains a hydrazide compound and/or an amine compound, the amount of odor component generated from a vinyl chloride resin molded product formed using a vinyl chloride resin composition can be further reduced, and if zirconium oxide is further contained, the amount of odor component generated from the vinyl chloride resin molded product can be further reduced.

Further, in the vinyl chloride resin composition of the present invention, the content of the (b) chemisorption deodorant is preferably 0.5 parts by mass or more and 10 parts by mass or less with respect to 100 parts by mass of the (a) vinyl chloride resin. If the content of the chemisorption deodorant (b) is 0.5 to 10 parts by mass based on 100 parts by mass of the vinyl chloride resin (a), the amount of odor components generated from a vinyl chloride resin molded product formed from the vinyl chloride resin composition can be further reduced, and the tensile elongation of the resulting vinyl chloride resin molded product can be sufficiently ensured.

Further, the vinyl chloride resin composition of the present invention is preferably used for powder molding. When the vinyl chloride resin composition is used for powder molding, a vinyl chloride resin molded article which can be favorably used as, for example, a skin of an automobile interior part can be easily obtained.

Further, the vinyl chloride resin composition of the present invention is preferably used for powder slush molding. When the vinyl chloride resin composition is used for powder slush molding, a vinyl chloride resin molded article which can be favorably used as, for example, a skin of an automobile interior part can be more easily obtained.

A method for producing a vinyl chloride resin composition according to the present invention is a method for producing a vinyl chloride resin composition containing a vinyl chloride resin and a chemisorption deodorant, wherein the chemisorption deodorant has a heat resistance temperature of 150 ℃ or higher, the chemisorption deodorant has a volume average particle diameter of 0.5 μm or more and 10 μm or less, the vinyl chloride resin composition contains a release agent, and the method comprises: a step (A) for preparing a composition (X) containing the components other than the chemisorption type deodorant and the release agent among the components of the vinyl chloride resin composition; a step B of adding the release agent to the composition (X); a step C1 of adding a chemisorption deodorant to the composition (X) simultaneously with the step B; or a step C2 of adding the chemisorption deodorant to the composition (Y) after the composition (Y) is obtained in the step B. Thus, a vinyl chloride resin composition is obtained by preparing a composition containing components other than the chemisorption type deodorant having the heat-resistant temperature and the volume average particle diameter within the predetermined ranges and the release agent among the components of the vinyl chloride resin composition, and then adding the composition simultaneously with the release agent or after adding the release agent, and a vinyl chloride resin molded article having a reduced amount of odor components can be formed by using this vinyl chloride resin composition.

In addition, in order to advantageously solve the above problems, the vinyl chloride resin molded article of the present invention is characterized by being molded from any one of the above vinyl chloride resin compositions. The vinyl chloride resin molded body obtained by using the vinyl chloride resin composition can reduce the generation amount of odor components.

Further, the vinyl chloride resin molded article of the present invention can be used as a skin of an automobile interior part.

In addition, the present invention is directed to advantageously solve the above problems, and a laminate of the present invention is characterized by having a foamed polyurethane molded article and any of the above vinyl chloride resin molded articles. When a laminate is produced using a foamed polyurethane molded article and the above vinyl chloride resin molded article, the laminate can have a vinyl chloride resin molded article portion in which the amount of odor components generated is reduced.

Effects of the invention

According to the present invention, a vinyl chloride resin molded article with reduced generation of odor components can be provided. The present invention can also provide a vinyl chloride resin composition capable of forming the vinyl chloride resin molded product and a laminate having the vinyl chloride resin molded product.

Detailed Description

Hereinafter, embodiments of the present invention will be described in detail.

The vinyl chloride resin composition of the present invention can be used, for example, for forming a vinyl chloride resin molded article of the present invention. The vinyl chloride resin molded product formed using the vinyl chloride resin composition of the present invention can be used for producing, for example, the laminate of the present invention having the vinyl chloride resin molded product. The vinyl chloride resin molded article of the present invention can be suitably used as an automotive interior material such as a skin of an automotive interior member such as an automobile instrument panel. In addition, the vinyl chloride resin composition of the present invention can be prepared, for example, by the method for producing the vinyl chloride resin composition of the present invention.

(vinyl chloride resin composition)

The vinyl chloride resin composition of the present invention comprises (a) a vinyl chloride resin and (b) a chemisorption type deodorant having a heat-resistant temperature and a volume average particle diameter within predetermined ranges, and may further optionally contain other additives.

Further, since the vinyl chloride resin composition of the present invention comprises at least (a) the vinyl chloride resin and (b) the chemisorption type deodorant having a heat-resistant temperature and a volume average particle diameter within predetermined ranges, a vinyl chloride resin molded product having a reduced amount of odor components can be formed if the vinyl chloride resin composition is used.

< (a) vinyl chloride resin

Here, the vinyl chloride resin (a) may contain, for example, 1 or 2 or more types of vinyl chloride resin particles, and may optionally contain 1 or 2 or more types of vinyl chloride resin fine particles. Among them, the vinyl chloride resin (a) preferably contains at least vinyl chloride resin particles, and more preferably contains vinyl chloride resin particles and vinyl chloride resin fine particles.

The vinyl chloride resin (a) can be produced by any conventionally known production method such as suspension polymerization, emulsion polymerization, solution polymerization, and bulk polymerization.

In the present specification, the term "resin particle" means a particle having a particle diameter of 30 μm or more, and the term "resin fine particle" means a particle having a particle diameter of less than 30 μm.

Further, examples of (a) the vinyl chloride resin include: examples of the homopolymer composed of a vinyl chloride monomer unit include a vinyl chloride copolymer containing a vinyl chloride monomer unit in an amount of preferably 50% by mass or more, more preferably 70% by mass or more. As a specific example of the monomer (comonomer) copolymerizable with vinyl chloride monomer, which can constitute the vinyl chloride copolymer, for example, the monomer described in international publication No. 2016/098344 can be used. These components may be used alone in 1 kind, or may be used in combination in 2 or more kinds at an arbitrary ratio.

(vinyl chloride resin particles)

In the vinyl chloride resin composition, the vinyl chloride resin particles generally function as a matrix resin (base material). The vinyl chloride resin particles are preferably produced by a suspension polymerization method.

[ average polymerization degree ]

The average polymerization degree of the vinyl chloride resin constituting the vinyl chloride resin particles is preferably 800 or more, more preferably 1000 or more, preferably 5000 or less, more preferably 3000 or less, further preferably 2800 or less, and further preferably 1300 or less. When the average polymerization degree of the vinyl chloride resin constituting the vinyl chloride resin particles is 800 or more, the physical strength of a vinyl chloride resin molded article formed using the vinyl chloride resin composition can be sufficiently ensured, and for example, the tensile elongation can be made good. Furthermore, a vinyl chloride resin molded article having a low peak top temperature of loss modulus E ″ after a heat aging test and a good tensile elongation can be suitably used as an automobile interior material such as a skin of an automobile instrument panel which is not scattered of fragments and can be cracked as designed and has good ductility when an airbag is inflated and deployed. On the other hand, if the average polymerization degree of the vinyl chloride resin constituting the vinyl chloride resin particles is 5000 or less, the melt property of the vinyl chloride resin composition can be improved, and the surface smoothness of a vinyl chloride resin molded product formed using the composition can be improved.

In the present invention, the "average polymerization degree" can be measured according to JIS K6720-2.

[ average particle diameter ]

The average particle diameter of the vinyl chloride resin particles is usually 30 μm or more, preferably 50 μm or more, more preferably 100 μm or more, still more preferably 136 μm or more, particularly preferably 145 μm or more, preferably 500 μm or less, and more preferably 200 μm or less. If the average particle diameter of the vinyl chloride resin particles is 30 μm or more, the powder flowability of the vinyl chloride resin composition can be improved. On the other hand, if the average particle diameter of the vinyl chloride resin particles is 500 μm or less, the fusibility of the vinyl chloride resin composition can be improved, and the surface smoothness of a vinyl chloride resin molded article formed using the composition can be improved.

In the present invention, the "average particle diameter of vinyl chloride resin particles" can be measured as a volume average particle diameter by a laser diffraction method in accordance with JIS Z8825.

[ content ratio ]

The content ratio of the vinyl chloride resin particles in the vinyl chloride resin (a) is preferably 70% by mass or more, more preferably 80% by mass or more, and can be 100% by mass, preferably 95% by mass or less, more preferably 90% by mass or less. When the content of vinyl chloride resin particles in the vinyl chloride resin (a) is 70 mass% or more, the physical strength of a vinyl chloride resin molded article formed using the vinyl chloride resin composition can be sufficiently ensured, and the tensile elongation can be improved. On the other hand, if the content ratio of the vinyl chloride resin particles in the vinyl chloride resin (a) is 95 mass% or less, the powder flowability of the vinyl chloride resin composition can be improved.

Fine particles of vinyl chloride resin

In the vinyl chloride resin composition, the vinyl chloride resin fine particles generally function as a release agent (powder flowability improver). The vinyl chloride resin fine particles are preferably produced by emulsion polymerization.

[ average polymerization degree ]

The average polymerization degree of the vinyl chloride resin constituting the vinyl chloride resin fine particles is preferably 500 or more, more preferably 700 or more, still more preferably 800 or more, preferably 3000 or less, and more preferably 2500 or less. When the average polymerization degree of the vinyl chloride resin constituting the vinyl chloride resin fine particles as the release agent is 500 or more, the powder flowability of the vinyl chloride resin composition is improved and the tensile elongation of the molded article obtained using the composition can be improved. On the other hand, if the average polymerization degree of the vinyl chloride resin constituting the vinyl chloride resin fine particles is 3000 or less, the melt property of the vinyl chloride resin composition is improved, and the surface smoothness of a vinyl chloride resin molded product formed using the composition can be improved.

[ average particle diameter ]

The average particle diameter of the vinyl chloride resin fine particles is usually less than 30 μm, preferably 10 μm or less, more preferably 5 μm or less, preferably 0.1 μm or more, more preferably 1 μm or more, and still more preferably 1.8 μm or more. If the average particle diameter of the vinyl chloride resin fine particles is 0.1 μm or more, the powder flowability of the vinyl chloride resin composition can be improved without excessively decreasing the size of the release agent, for example. On the other hand, if the average particle diameter of the vinyl chloride resin fine particles is less than 30 μm, the melt property of the vinyl chloride resin composition is improved, and the surface smoothness of a vinyl chloride resin molded article formed using the composition can be improved.

In the present invention, the "average particle diameter of vinyl chloride resin fine particles" can be measured as a volume average particle diameter by a laser diffraction method in accordance with JIS Z8825.

[ content ratio ]

The content ratio of the vinyl chloride resin fine particles in the vinyl chloride resin (a) is preferably 5% by mass or more, more preferably 10% by mass or more, preferably 30% by mass or less, and more preferably 20% by mass or less. When the content of the vinyl chloride resin fine particles in the vinyl chloride resin (a) is 5% by mass or more, the powder flowability of the vinyl chloride resin composition can be improved. On the other hand, if the content of the vinyl chloride resin fine particles in the vinyl chloride resin (a) is 30 mass% or less, the physical strength of a vinyl chloride resin molded article formed using the vinyl chloride resin composition can be improved.

(b) a chemical adsorption type deodorizing agent

(b) The chemisorption type deodorant is a material capable of adsorbing or decomposing an odor component by forming a chemical bond with the odor component to exhibit a deodorant effect, and is a component capable of reducing the amount of the odor component generated from a vinyl chloride resin molded product when or after the vinyl chloride resin molded product is formed from a vinyl chloride resin composition. However, the (b) chemisorption type deodorant may contain a material which can exhibit a deodorant effect by being physically adsorbed to the odor component.

The target odor component of the chemisorption type deodorant (b) is not particularly limited, and examples thereof include: alkaline gases such as ammonia and amines; acid gases such as acetic acid and isovaleric acid; aldehyde-based gases such as formaldehyde, acetaldehyde, octanal, nonenal, etc.; sulfur-based gases such as hydrogen sulfide and methyl mercaptan. It is particularly preferable that (b) the chemisorption type deodorant is capable of eliminating at least the aldehyde-based gas. If the (b) chemisorption type deodorant is capable of deodorizing an aldehyde-based gas as an odor component, the amount of odor component generated from the resulting vinyl chloride resin molded product can be further reduced.

Here, the heat-resistant temperature of the (b) chemisorption type deodorant needs to be 150 ℃ or higher, preferably 160 ℃ or higher, more preferably 300 ℃ or higher, preferably 1000 ℃ or lower, and more preferably 500 ℃ or lower. If the heat-resistant temperature of the chemisorption deodorant (b) is 150 ℃ or higher, the amount of odor components generated from the resulting vinyl chloride resin molded product can be favorably reduced. On the other hand, if the heat-resistant temperature of (b) the chemisorption type deodorant is 1000 ℃ or lower, the handling properties of (b) the chemisorption type deodorant, the vinyl chloride resin molded product obtained therefrom, and the handling at the time of disposal of (b) the chemisorption type deodorant become easy.

The volume average particle diameter of the (b) chemisorption type deodorant is required to be 0.5 μm or more, preferably 0.8 μm or more, more preferably 1.2 μm or more, further preferably 1.5 μm or more, particularly preferably 2.0 μm or more, and is required to be 10 μm or less, preferably 9 μm or less, more preferably 8 μm or less, further preferably 7 μm or less, particularly preferably 6.0 μm or less. If the volume average particle diameter of the chemisorption deodorant (b) is not less than the lower limit, the amount of odor component generated from the resulting vinyl chloride resin molded product can be favorably reduced. On the other hand, if the volume average particle diameter of the chemisorption deodorant (b) is not more than the upper limit, the tensile elongation of the resulting vinyl chloride resin molded product can be sufficiently ensured.

The chemisorption type deodorant (b) is not particularly limited, and known chemisorption type deodorants can be used, and various oxides, hydroxides, hydrazide compounds, aminoguanidine salts, amine compounds, and the like can be used. The chemical adsorption type deodorant (b) may be used alone in 1 kind or in a mixture of plural kinds at an arbitrary ratio.

Specific examples of the oxide and/or hydroxide include oxides and/or hydroxides of at least 1 element selected from magnesium, aluminum, silicon, zirconium, silver, copper, zinc, and manganese. Among them, oxides and/or hydroxides of at least 1 element selected from magnesium, aluminum, silicon, and zirconium are preferable. The oxide and/or hydroxide may be a hydrate.

Specific examples of the hydrazide compound include dihydrazide compounds such as adipic acid dihydrazide, sebacic acid dihydrazide, carbonyl dihydrazide, succinic acid dihydrazide, oxalic acid dihydrazide, and the like.

Further, as the aminoguanidine salt, aminoguanidine hydrochloride, aminoguanidine sulfate, aminoguanidine bicarbonate, and the like can be cited.

Further, specific examples of the amine compound include polyamine compounds and the like. Furthermore, as the polyamine compound, for example: aliphatic polyamines such as diethylenetriamine and tetraethylenepentamine; aromatic polyamines; alicyclic polyamines, and the like.

The hydrazide compound, aminoguanidine salt, and amine compound are preferably used by being supported on and/or mixed with zeolite, silica gel, the above-mentioned oxide and/or hydroxide, and the like.

Further, as the (b) chemisorption type deodorant, an oxide and/or a hydroxide of at least 1 element selected from magnesium, aluminum, silicon, and zirconium is preferably used. When the above-mentioned oxide and/or hydroxide of the predetermined element is used as the (b) chemisorption deodorant, the amount of odor component generated from the resulting vinyl chloride resin molded product can be further reduced.

Further, as the (b) chemisorption type deodorant, a hydrazide compound and/or an amine compound is preferably used. Even when a hydrazide compound and/or an amine compound is used as the (b) chemisorption deodorant, the amount of odor components generated from the resulting vinyl chloride resin molded product can be further reduced. Further, when the hydrazide compound and/or the amine compound is used as the (b) chemisorption type deodorant, it is more preferable to use zirconium oxide in combination. If the chemisorption type deodorant in the vinyl chloride resin composition contains a hydrazide compound and/or an amine compound and further contains zirconium oxide, the amount of odor components generated from the resulting vinyl chloride resin molded product can be further reduced. The reason why the amount of odor component generated from the resulting vinyl chloride resin molded product can be further reduced by using the hydrazide compound and/or the amine compound in combination with zirconium oxide as the (b) chemisorption type deodorant is not clearly understood, but it is presumed that the reason is: with the above configuration, odor components of different types, such as alkaline gas, acidic gas, aldehyde gas, and sulfur gas, can be deodorized.

Further, as the chemisorption type deodorant (b), a silica-zirconia mixture, a zeolite-sebacic dihydrazide mixture, a magnesia-alumina hydrate mixture, a zirconia hydrate and aluminum hydroxide supporting an amine compound are preferably used, more preferably a silica-zirconia mixture and a zeolite-sebacic dihydrazide mixture are used in combination, or a magnesia-alumina hydrate mixture, a zirconia hydrate and aluminum hydroxide supporting an amine compound are used in combination, and still more preferably a magnesia-alumina hydrate mixture, a zirconia hydrate and aluminum hydroxide supporting an amine compound are used in combination. If the above-mentioned predetermined chemisorption type deodorant is used as the (b) chemisorption type deodorant, the amount of odor component generated from the resulting vinyl chloride resin molded product can be further reduced, and if the above-mentioned predetermined combination is used in combination as the (b) chemisorption type deodorant, the amount of odor component generated from the resulting vinyl chloride resin molded product can be further reduced.

Further, as the chemisorption type deodorant (b), commercially available products can be used, and examples thereof include RASAIndustries, "KD-511" manufactured by LTD., Sinanen Zeomic Co., Ltd., "Dushlite S" manufactured by Ltd., KESMON NS-70 "manufactured by Toyo Synthesis Co., Ltd., KESMON NS-80E" manufactured by Toyo Synthesis Co., Ltd., and "KESMON NS-231" manufactured by Toyo Synthesis Co., Ltd.

The content of the (b) chemisorption type deodorant is preferably 0.5 parts by mass or more, more preferably 0.8 parts by mass or more, further preferably 1.0 parts by mass or more, preferably 10 parts by mass or less, more preferably 6 parts by mass or less, and further preferably 4 parts by mass or less, based on 100 parts by mass of the (a) vinyl chloride resin. If the content of the (b) chemisorption deodorant is not less than the lower limit, the amount of odor components generated from the resulting vinyl chloride resin molded product can be further reduced. On the other hand, if the content of the chemisorption deodorant (b) is not more than the upper limit, the tensile elongation of the resulting vinyl chloride resin molded product can be sufficiently ensured.

< additive >

The vinyl chloride resin composition of the present invention may further contain various additives in addition to the above components. The additives are not particularly limited, and examples thereof include: plasticizers such as trimellitate esters; stabilizers such as perchloric acid-treated hydrotalcite, zeolite, β -diketone and fatty acid metal salt; a release agent; a release agent other than the vinyl chloride resin fine particles; an impact resistance improver; perchloric acid compounds (sodium perchlorate, potassium perchlorate, etc.) other than the perchloric acid-treated hydrotalcite; an antioxidant; a mold inhibitor; a flame retardant; an antistatic agent; a filler; a light stabilizer; a foaming agent; molding processability modifier (silicone oil, etc.); a colorant.

Such an additive is not particularly limited, and for example, an additive described in international publication No. 2016/098344 (except for hydroxide, hydrazide compound, and amine compound that can function as the above-described chemisorption type deodorant) can be used.

As described above, the additive can be used without particular limitation, and among them, the vinyl chloride resin composition of the present invention preferably contains a plasticizer. When the vinyl chloride resin composition contains a plasticizer, the resulting vinyl chloride resin molded article can have a good tensile elongation at low temperatures.

Among the plasticizers, a plasticizer containing trimellitate is preferable, a plasticizer containing trialkyl trimellitate is more preferable, and a plasticizer containing tri-n-octyl trimellitate is further preferable. By including the above-mentioned preferred plasticizer in the vinyl chloride resin composition, the tensile elongation of the resulting vinyl chloride resin molded product at low temperature can be further improved.

The content of the plasticizer in the vinyl chloride resin composition is preferably 50 parts by mass or more and 200 parts by mass or less with respect to 100 parts by mass of the (a) vinyl chloride resin. When the content of the plasticizer in the vinyl chloride resin composition is not less than the lower limit, the tensile elongation of the resulting vinyl chloride resin molded product at low temperature can be further improved. On the other hand, if the content of the plasticizer in the vinyl chloride resin composition is not more than the upper limit, the surface tackiness of the resulting vinyl chloride resin molded article can be further suppressed, and the surface smoothness can be further improved.

< use of vinyl chloride resin composition >

Further, the obtained vinyl chloride resin composition can be preferably used for powder molding, and can be more preferably used for powder slush molding.

(method for producing vinyl chloride resin composition)

The present invention provides a method for producing a vinyl chloride resin composition comprising a vinyl chloride resin and a chemisorption deodorant, wherein the chemisorption deodorant has a heat-resistant temperature of 150 ℃ or higher, the volume average particle diameter of the chemisorption deodorant is 0.5 μm or more and 10 μm or less, the vinyl chloride resin composition comprises a release agent, and the method comprises: a step (A) for preparing a composition (X) containing the components other than the chemisorption type deodorant and the release agent among the components of the vinyl chloride resin composition; a step B of adding the release agent to the composition (X); and a step C1 of adding a chemisorption deodorant to the composition (X) simultaneously with the step B; or a step C2 of adding the chemisorption deodorant to the composition (Y) after the composition (Y) is obtained in the step B. Further, according to the method for producing a vinyl chloride resin composition of the present invention, a vinyl chloride resin composition capable of forming a vinyl chloride resin molded body with a reduced amount of odor components can be produced.

As the vinyl chloride resin, the chemisorption type deodorant and the release agent, the vinyl chloride resin, the chemisorption type deodorant and the release agent described above in the section of "vinyl chloride resin composition" can be used.

< Process A >

In step a, a composition (X) containing components other than the above-described chemisorption type deodorant and release agent among the components of the vinyl chloride resin composition is prepared. For example, a step of mixing the above-mentioned components except the chemisorption type deodorant and the release agent (including vinyl chloride resin fine particles) in the "vinyl chloride resin composition" by dry blending may be mentioned. Here, the dry blending preferably uses a henschel mixer. The temperature at the time of dry blending is not particularly limited, but is preferably 50 ℃ or higher, more preferably 70 ℃ or higher, and preferably 200 ℃ or lower.

When the components of the vinyl chloride resin composition include the plasticizer, the chemisorption deodorant, and the release agent (including the vinyl chloride resin fine particles) may be added to the mixture at the time of dry-blending the components of the vinyl chloride resin composition, and the mixture is heated to a predetermined temperature, and the mixture may be further heated to be dried (i.e., the plasticizer is absorbed by the vinyl chloride resin particles as the vinyl chloride resin, and the mixture becomes dry).

< Process B >

Next, in step B, a release agent is added to the composition (X). The step B is not particularly limited, and may be, for example, a step of adding and mixing the release agent (including vinyl chloride resin fine particles) in the "vinyl chloride resin composition" to the composition (X) obtained in the step a.

< Process C1 or C2 >

The method for producing a vinyl chloride resin composition of the present invention includes, in addition to the steps a and B, a step C1 of adding a chemisorption deodorant to the composition (X) simultaneously with the step B, or a step C2 of adding a chemisorption deodorant to the composition (Y) after the composition (Y) is obtained in the step B. In addition, in the method for producing a vinyl chloride resin composition of the present invention, when the step C2 is included, the deodorizing performance of the chemisorption type deodorizing agent is less likely to be lost in the step than when the step C1 is included, and the amount of odor components generated from a vinyl chloride resin molded product formed using the obtained vinyl chloride resin composition can be further reduced, which is preferable.

The temperature of the composition (X) or the composition (Y) when the chemisorption type deodorant is added is preferably 10 ℃ or higher, more preferably 20 ℃ or higher, preferably 50 ℃ or lower, and more preferably 35 ℃ or lower. If the temperature of the composition (X) or the composition (Y) at the time of adding the chemisorption deodorant is not lower than the lower limit, the chemisorption deodorant is more likely to be uniformly dispersed in the composition (X) or the composition (Y). On the other hand, if the temperature of the composition (X) or the composition (Y) when the chemisorption deodorant is added is not more than the above upper limit, the reduction in the deodorant performance of the chemisorption deodorant is easily prevented.

(vinyl chloride resin molded article)

The vinyl chloride resin molded article of the present invention is obtained by molding the vinyl chloride resin composition by any method. The vinyl chloride resin molded article of the present invention is formed using any one of the above-described vinyl chloride resin compositions, and comprises at least (a) a vinyl chloride resin and (b) a chemisorption type deodorant having a heat-resistant temperature and a volume average particle diameter within the above-described predetermined ranges, so that the amount of odor components generated can be reduced. Therefore, the vinyl chloride resin molded article of the present invention can be preferably used as a surface skin of an automobile interior material, particularly an automobile interior member such as an automobile instrument panel.

< method for Forming vinyl chloride resin molded article >

Here, when the vinyl chloride resin molded body is formed by powder slush molding, the mold temperature at the time of powder slush molding is not particularly limited, but is preferably 200 ℃ or more, more preferably 220 ℃ or more, preferably 300 ℃ or less, and more preferably 280 ℃ or less.

In addition, the method for producing the vinyl chloride resin molded article is not particularly limited, and the following method can be used, for example. That is, the vinyl chloride resin composition of the present invention is poured into a mold having the above temperature range, left for a period of time of 5 seconds to 30 seconds, and then left at any temperature for a period of time of 30 seconds to 3 minutes. Thereafter, the mold is cooled to 10 ℃ or higher and 60 ℃ or lower, and the resulting vinyl chloride resin molded article of the present invention is released from the mold. Then, a sheet-like molded body having a mold shape was obtained.

(laminated body)

The laminate of the present invention comprises any of the above vinyl chloride resin molded articles and a foamed polyurethane molded article. In addition, the vinyl chloride resin molded body generally constitutes one surface of the laminate.

The laminate of the present invention is formed using the vinyl chloride resin composition of the present invention, for example, and has a vinyl chloride resin molded body in which the amount of odor components generated is reduced, and therefore, can be preferably used as a surface skin of an automobile interior material, particularly an automobile interior member such as an automobile instrument panel.

Here, the method of laminating the foamed polyurethane molded article and the vinyl chloride resin molded article is not particularly limited, and the following method can be used, for example. Namely, there can be mentioned: (1) a method of preparing a foamed polyurethane molded article and a vinyl chloride resin molded article separately and then bonding them together by using thermal fusion, thermal adhesion, a known adhesive, or the like; (2) a method of directly forming a foamed polyurethane molded article on a vinyl chloride resin molded article by reacting an isocyanate, which is a raw material of the foamed polyurethane molded article, with a polyol or the like, polymerizing the isocyanate, and foaming the polyurethane by a known method. Among these, the latter method (2) is preferable because the process is simplified and the vinyl chloride resin molded article and the foamed polyurethane molded article are easily and firmly bonded to each other when a laminate having various shapes is obtained.