阅读说明：本技术 阻燃性树脂组合物和成形体 (Flame-retardant resin composition and molded article ) 是由 木村和 于 2019-09-25 设计创作，主要内容包括：一种阻燃性树脂组合物,其包含下述(A)成分～(D)成分,且实质上不包含锑,上述(A)成分的含量以上述(A)成分～(C)成分的含量的合计100质量％为基准,为39.5质量％以上且98.5质量％以下,上述(B)成分的含量以上述(A)成分～(C)成分的含量的合计100质量％为基准,为1质量％以上且60质量％以下,上述(C)成分的含量以上述(A)成分～(C)成分的含量的合计100质量％为基准,为0.5质量％以上且20质量％以下,上述(D)成分的含量以上述(A)成分～(C)成分的含量的合计100质量份为基准为0.01质量份以上且3.0质量份以下。(A)聚烯烃、(B)天然无机填料、(C)阻燃剂、(D)自由基产生剂。(A flame-retardant resin composition which contains components (A) to (D) and substantially no antimony, wherein the content of component (A) is 39.5 to 98.5 mass% based on 100 mass% in total of the contents of components (A) to (C), the content of component (B) is 1 to 60 mass% based on 100 mass% in total of the contents of components (A) to (C), the content of component (C) is 0.5 to 20 mass% based on 100 mass% in total of the contents of components (A) to (C), and the content of component (D) is 0.01 to 3.0 parts by mass based on 100 parts by mass in total of the contents of components (A) to (C). (A) Polyolefin, (B) natural inorganic filler, (C) flame retardant, and (D) radical generator.)

1. A flame-retardant resin composition which comprises the following components A to D and contains substantially no antimony,

component A: polyolefins

And B component: natural inorganic filler

And C, component C: flame retardant

And (D) component: a free-radical generating agent which is capable of generating free radicals,

the content of the component A is 39.5-98.5% by mass based on 100% by mass of the total of the contents of the components A to C,

the content of the component B is 1 to 60% by mass based on 100% by mass of the total of the contents of the components A to C,

the content of the component C is 0.5 to 20% by mass based on 100% by mass of the total of the contents of the components A to C,

the content of the component D is 0.01 to 3.0 parts by mass based on 100 parts by mass of the total of the contents of the components A to C.

2. The flame-retardant resin composition according to claim 1,

the flame-retardant resin composition has a melt flow rate of 0.01g/10 min to 100g/10 min at 230 ℃.

3. The flame-retardant resin composition according to claim 1 or 2,

the component A comprises polypropylene.

4. The flame-retardant resin composition according to any one of claims 1 to 3, wherein,

the component A has a melt flow rate of 0.01g/10 min to 100g/10 min at 230 ℃.

5. The flame-retardant resin composition according to any one of claims 1 to 4,

the component A is polypropylene.

6. The flame-retardant resin composition according to any one of claims 1 to 5,

the component B contains 1 or more selected from talc and wollastonite.

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

the component B is talc, and the component B is,

the component B has an average particle diameter of 7 to 30 μm.

8. The flame-retardant resin composition according to any one of claims 1 to 7,

the component C contains a halogen-based flame retardant.

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

the component C contains a bromine-based flame retardant.

10. The flame-retardant resin composition according to any one of claims 1 to 9,

the C component contains tris (tribromoneopentyl) phosphate.

11. The flame-retardant resin composition according to any one of claims 1 to 10,

the melting point of the component C is 50 ℃ to 250 ℃.

12. The flame-retardant resin composition according to any one of claims 1 to 11,

the decomposition temperature of the component C is 200 ℃ to 400 ℃.

13. The flame-retardant resin composition according to any one of claims 1 to 12,

the component D comprises a 2, 3-dimethyl-2, 3-diphenyl-butane structure.

14. The flame-retardant resin composition according to any one of claims 1 to 13,

the component D is 2, 3-dimethyl-2, 3-diphenyl-butane or poly-1, 4-diisopropylbenzene.

15. A molded article produced by using the flame-retardant resin composition according to any one of claims 1 to 14.

Technical Field

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

Background

Polyolefins are widely used as molding materials because of their excellent properties, but because of their flammability, they are often required to impart flame retardancy to industrial materials.

For the purpose of flame retardancy, compositions in which an antimony compound is added to a polyolefin are known (for example, patent documents 1 and 2).

Documents of the prior art

Patent document

Patent document 1: japanese laid-open patent publication No. 2002-322322

Patent document 2: japanese laid-open patent publication No. 2012-500880

Disclosure of Invention

The purpose of the present invention is to provide a flame-retardant resin composition and a molded article that can suppress the content of antimony and can provide a molded article having excellent flame retardancy.

The present inventors have noticed based on this knowledge that when a flame-retardant resin composition contains an antimony compound, particularly antimony trioxide, the use thereof is limited because antimony trioxide is a highly toxic substance and is a substance designated by a standard for preventing harm of a specific chemical substance.

As a result of intensive studies, the present inventors have found that the content of antimony in a flame-retardant resin composition can be suppressed by using a natural inorganic filler, a flame retardant and a radical generator in combination at a specific content, and have completed the present invention.

The present invention provides the following flame-retardant resin composition.

1. A flame-retardant resin composition which comprises the following components (A) to (D) and contains substantially no antimony,

(A) polyolefins

(B) Natural inorganic filler

(C) Flame retardant

(D) Free radical generator

The content of the component (A) is 39.5 to 98.5% by mass based on 100% by mass of the total of the contents of the components (A) to (C),

the content of the component (B) is 1 to 60% by mass based on 100% by mass of the total of the contents of the components (A) to (C),

the content of the component (C) is 0.5 to 20% by mass based on 100% by mass of the total of the contents of the components (A) to (C),

the content of the component (D) is 0.01 to 3.0 parts by mass based on 100 parts by mass of the total of the contents of the components (A) to (C).

2. The flame-retardant resin composition according to claim 1, wherein the flame-retardant resin composition has a melt flow rate at 230 ℃ of 0.01g/10 min or more and 100g/10 min or less.

3. The flame-retardant resin composition according to claim 1 or 2, wherein the component (A) comprises polypropylene.

4. The flame-retardant resin composition according to any one of claims 1 to 3, wherein the component (A) has a melt flow rate of 0.01g/10 min to 100g/10 min at 230 ℃.

5. The flame-retardant resin composition according to any one of claims 1 to 4, wherein the component (A) is polypropylene.

6. The flame-retardant resin composition according to any one of claims 1 to 5, wherein the component (B) contains 1 or more selected from talc and wollastonite.

7. The flame-retardant resin composition according to any one of claims 1 to 6, wherein the component (B) is talc, and the average particle diameter of the component (B) is 7 μm or more and 30 μm or less.

8. The flame-retardant resin composition according to any one of claims 1 to 7, wherein the component (C) contains a halogen-based flame retardant.

9. The flame-retardant resin composition according to any one of claims 1 to 8, wherein the component (C) contains a bromine-based flame retardant.

10. The flame-retardant resin composition according to any one of claims 1 to 9, wherein the component (C) comprises tris (tribromoneopentyl) phosphate.

11. The flame-retardant resin composition according to any one of claims 1 to 10, wherein the component (C) has a melting point of 50 ℃ or higher and 250 ℃ or lower.

12. The flame-retardant resin composition according to any one of claims 1 to 11, wherein the decomposition temperature of the component (C) is 200 ℃ or higher and 400 ℃ or lower.

13. The flame-retardant resin composition according to any one of claims 1 to 12, wherein the component (D) has a 2, 3-dimethyl-2, 3-diphenyl-butane structure.

14. The flame-retardant resin composition according to any one of claims 1 to 13, wherein the component (D) is 2, 3-dimethyl-2, 3-diphenyl-butane or poly-1, 4-diisopropylbenzene.

15. A molded article produced using the flame-retardant resin composition described in any one of 1 to 14.

According to the present invention, a flame-retardant resin composition and a molded article can be provided, which can suppress the content of antimony and can provide a molded article having excellent flame retardancy.

In particular, the amount of the solvent to be used,

in the present specification, "x to y" are defined as "x or more and y or less".

In the present specification, the preferable specifications may be optionally adopted, and it can be said that a combination between the preferable specifications is more preferable.

Optional constituents may be added within a range not to impair the effects of the invention.

In the present specification, "carbon number XX to YY" in the expression "substituted or unsubstituted ZZ group having carbon numbers XX to YY" represents the carbon number when the ZZ group is unsubstituted, and does not include the carbon number of the substituent when the substitution occurs. Here, "YY" is larger than "XX", "XX" and "YY" each represent an integer of 1 or more.

The "unsubstituted" in the case of the expression "substituted or unsubstituted" means that a hydrogen atom is bonded without being substituted by the above-mentioned substituent.

One embodiment of the flame-retardant resin composition of the present invention relates to a flame-retardant resin composition which contains the following components (a) to (D) and substantially contains no antimony:

(A) polyolefin (hereinafter also referred to as "(A) component")

(B) A natural inorganic filler (hereinafter, also referred to as "component (B)")

(C) Flame retardant (hereinafter, also referred to as "component C")

(D) Radical generators (hereinafter also referred to as "(D) component")

The content of the component (A) is 39.5 to 98.5 mass% (preferably 40 to 97 mass%, more preferably 52 to 96 mass%, further preferably 59 to 95 mass%, and particularly preferably 66 to 94 mass%) based on 100 mass% in total of the contents of the components (A) to (C), (the content of the component (B) is 1 to 60 mass% (preferably 2 to 50 mass%, more preferably 3 to 40 mass%, further preferably 4 to 35 mass%, and particularly preferably 5 to 30 mass%) based on 100 mass% in total of the contents of the components (A) to (C), (the content of the component (C) is 0.5 to 20 mass% (preferably 0.7 to 10 mass%, more preferably 0.8 to 8 mass%, further preferably 0.9 to 6 mass%, and particularly preferably 1 to 4 mass%), the content of component (D) is 0.01 to 3.0 parts by mass (preferably 0.02 to 1.0 part by mass, more preferably 0.03 to 0.8 part by mass, further preferably 0.04 to 0.5 part by mass, particularly preferably 0.05 to 0.3 part by mass) based on 100 parts by mass of the total of the contents of components (A) to (C).

This can suppress the content of antimony and can provide a molded article having excellent flame retardancy.

In addition, as an optional effect, the content of the component (C) can be reduced. Therefore, as an optional effect, the cost can be reduced.

Further, as an optional effect, the obtained molded article can obtain sufficient flame retardancy even if it is thin (for example, V-2 described later).

In one embodiment of the flame-retardant resin composition of the present invention, the Melt Flow Rate (MFR) at 230 ℃ is preferably 0.01 to 100g/10 min, more preferably 0.1 to 90g/10 min, still more preferably 1 to 70g/10 min, and particularly preferably 3 to 50g/10 min, from the viewpoint of flame retardancy and moldability.

In one embodiment of the flame-retardant resin composition of the present invention, MFR is measured at 230 ℃ under 2.16kg in accordance with ASTM D-1238 (2013).

In one embodiment of the flame-retardant resin composition of the present invention, antimony is substantially not contained.

"substantially no antimony contained" means that the content is lower than the detection limit (2000ppm) of the following measurement apparatus.

The antimony content was measured using an EDS (energy dispersive X-ray analysis) device incorporated in JSM-6390LA (manufactured by Nippon electronics Co., Ltd.).

The polyolefin is not particularly limited, but examples thereof include homopolyolefins, olefin copolymers, and the like.

Examples of the polyolefin include polypropylene and polyethylene. From the viewpoint of heat resistance of the molded article, polypropylene is preferred.

Examples of the olefin include ethylene, propylene, butene, hexene, and α -olefin.

Examples of the α -olefin include 1-butene, 1-hexene, 1-pentene, 4-methyl-1-pentene, 1-octene, 1-decene, 1-dodecene, 1-tetradecene, 1-hexadecene, 1-octadecene, and 1-eicosene.

Examples of the homopolyolefin include homopolyethylene (for example, low density polyethylene, linear low density polyethylene, and high density polyethylene), homopolypropylene, and the like. From the viewpoint of heat resistance of the molded article, homopolypropylene is preferable.

The olefin copolymer may be a block copolymer, a random copolymer, or a mixture thereof.

Examples of the olefin copolymer include a propylene copolymer and an ethylene copolymer. Examples of the propylene copolymer include copolymers of propylene and the above-mentioned olefins other than propylene. Examples of the ethylene copolymer include copolymers of ethylene and the above-mentioned olefins other than ethylene. The olefin can be used alone in 1, also can be combined with more than 2.

The MFR of the component (A) at 230 ℃ is preferably 0.01 to 100g/10 min, more preferably 0.1 to 90g/10 min, still more preferably 1 to 70g/10 min, and particularly preferably 3 to 50g/10 min, from the viewpoints of lightweight, moldability, rigidity of molded articles, and impact resistance of molded articles.

The MFR of component (A) at 230 ℃ was measured at 230 ℃ under 2.16kg in accordance with ASTM D-1238 (2013).

Examples of commercially available polyolefins include polypropylene "Prime Polypro", "Poly-Fine" and "Prime TPO" manufactured by Prime Polymer corporation (for example, models "J-700 GP", "J106 MG", "J707G", "H700", "H-100M", "J105P", "J707P", "F-300 SP", "J-466 HP" and "E-105 GM"); polypropylene available from shinning corporation (for example, model "J-966 HP"); various polyethylene resins available from Prime Polymer Ltd, such as "HI-ZEX", "NEO-ZEX", "ULT-ZEX", "モアテツク" and "Evolu" (for example, high-density polyethylene resin, type "2200J"); low-density polyethylene (for example, model "Petrothene 190") available from Tosoh corporation, and the like.

The component (a) is preferably polypropylene from the viewpoint of heat resistance of the molded article.

(A) The component (A) may be used alone in 1 kind, or may be used in combination in 2 or more kinds.

Examples of the component (B) include talc and wollastonite.

From the viewpoint of flame retardancy, the component (B) preferably contains 1 or more selected from talc and wollastonite.

The average particle diameter (D50) of the component (B) when talc is used is preferably 7 to 30 μm, more preferably 10 to 20 μm, from the viewpoint of improving the flame retardancy of the flame-retardant resin composition.

The average particle diameter (D50) is a diameter obtained by dividing the powder into 2 parts by a certain particle diameter so that the larger side and the smaller side have the same size.

(B) When the component (B) is talc, the average particle diameter (D50) of the component (B) is measured by a laser diffraction particle size distribution measuring apparatus.

(B) When the component is wollastonite, the 400 mesh (ASTM standard) pass rate is preferably 90% or more, more preferably 95% or more, and still more preferably 98% or more, from the viewpoint of improving the flame retardancy of the resin composition. Further, it is preferably 100% or less.

The 400 mesh passage rate was determined by placing a sample on a 400 mesh screen, sieving the sample with a vibrating screen, and determining the passage rate at that time.

The water content in the case where the component (B) is talc is preferably 0 to 0.5%, more preferably 0 to 0.1%, from the viewpoint of blending (mixing) and from the viewpoint of suppressing a defect during molding.

(B) The moisture content of the components was measured by the karl fischer method.

The whiteness W value of the talc as the component (B) is preferably 50 to 100%, more preferably 70 to 100%, from the viewpoint of appearance of the molded article.

(B) The whiteness W value of the composition was measured using an SM color computer.

The apparent specific gravity when the component (B) is talc is preferably 0.2 to 0.8g/ml, more preferably 0.3 to 0.5g/ml, from the viewpoint of charging at the time of compounding.

(B) The apparent specific gravity of the component (A) was measured in accordance with JIS K5101.

The 500 ℃ heat loss at 500 ℃ when the component (B) is talc is preferably 0 to 6%, more preferably 0 to 3%, from the viewpoint of the appearance of the molded article.

(B) The 500 ℃ heat loss at 500 ℃ when the component is talc is measured using a muffle furnace.

(B) The component (A) may be used alone in 1 kind, or may be used in combination in 2 or more kinds.

The melting point of the component (C) is preferably 50 to 250 ℃ and more preferably 100 to 200 ℃ from the viewpoint of flame retardancy.

(C) The melting point of the component (d) is measured by TGA (thermogravimetric analysis)/DSC (differential scanning calorimeter) 1 described later.

The decomposition temperature of the component (C) is preferably 200 to 400 ℃ and more preferably 250 to 350 ℃ from the viewpoint of heat resistance.

(C) The decomposition temperature of the component (A) was measured by TGA/DSC1 described later.

Examples of the component (C) include halogen flame retardants and phosphorus flame retardants.

Examples of the halogen-based flame retardant include 2, 4, 6-tris (2, 4, 6-tribromophenoxy) -1, 3, 5-triazine, brominated epoxy oligomer, ethylenebis (pentabromophenyl), ethylenebis (tetrabromophthalimide), decabromodiphenyl ether, tetrabromobisphenol a, halogenated polycarbonate (co) polymer, halogenated polycarbonate or oligomer of halogenated polycarbonate (co) polymer, halogenated polystyrene, halogenated polyolefin, and the like.

Examples of the halogen flame retardant include bromine flame retardants and the like.

The component (C) preferably contains a bromine-based flame retardant from the viewpoint of flame retardancy.

Examples of the bromine-based flame retardant include 2, 2-bis [3, 5-dibromo-4- (2, 3-dibromopropyloxy) phenyl ] propane, bis [3, 5-dibromo-4- (2, 3-dibromopropyloxy) phenyl ] sulfone, pentabromobenzyl acrylate polymer, 1, 2, 5, 6, 9, 10-hexabromocyclododecane, 2, 4, 6-tris- (2, 4, 6-tribromophenoxy) -1, 3, 5-triazine, 2-bis (bromomethyl) -1, 3-propanediol, tribromo-neopentyl alcohol, 2-bis (4-allyloxy-3, 5-dibromophenyl) propane, BC-52-tetrabromobisphenol A, BC-58 tetrabromobisphenol A, tetrabromobisphenol A, 1, 1 '- [ ethylenebis (oxy) ] bis (2, 4, 6-tribromobenzene), pentabromobenzyl acrylate, tribromophenol acrylate, octabromodiphenyl ether, 2' - [ isopropylidenebis [ (2, 6-dibromo-4, 1-phenylene) oxy ] ] diethanol, N-methyl hexabromodiphenylamine, TBA bisbromoethyl ether, tris (tribromoneopentyl) phosphate, tris (dibromopropyl) isocyanurate, and the like.

(C) Component (c) preferably contains tris (tribromoneopentyl) phosphate and tris (dibromopropyl) isocyanurate, and more preferably contains tris (tribromoneopentyl) phosphate from the viewpoint of flame retardancy.

(C) The component (A) may be used alone in 1 kind, or may be used in combination in 2 or more kinds.

The decomposition temperature of the component (D) is preferably 80 to 280 ℃ and more preferably 120 to 240 ℃ from the viewpoint of flame retardancy.

(D) The decomposition temperature of the component (A) was measured by using TGA/DSC1 described later.

The melting point of the component (D) is preferably 50 to 250 ℃ and more preferably 100 to 200 ℃ from the viewpoint of flame retardancy.

(D) The melting point of component (A) was measured by TGA/DSC1 described later.

Examples of the component (D) include organic peroxides, initiators for breaking carbon-carbon bonds, initiators for breaking nitrogen-nitrogen bonds, and the like.

(D) Ingredient (b) preferably comprises a 2, 3-dimethyl-2, 3-diphenyl-butane structure (also known as a diisopropylbenzene structure).

Examples of the component (D) include 2, 3-dimethyl-2, 3-diphenyl-butane and poly-1, 4-diisopropylbenzene (tri-1, 4-diisopropylbenzene).

The component (D) is preferably 2, 3-dimethyl-2, 3-diphenyl-butane from the viewpoint of flame retardancy.

The component (D) is preferably poly-1, 4-diisopropylbenzene from the viewpoint of flame retardancy.

In one embodiment of the flame retardant resin composition of the present invention, an additive may be further contained, if necessary.

Examples of the additives include ultraviolet absorbers, light stabilizers, antioxidants, lubricants, crystal nucleating agents, softeners, antistatic agents, metal deactivators, antibacterial or antifungal agents, and pigments.

The ultraviolet absorber is not particularly limited, but examples thereof include benzophenone compounds, benzotriazole compounds, benzoate compounds, polyamide polyether block copolymers (to impart permanent antistatic properties), and the like.

The antioxidant is not particularly limited, but examples thereof include a phenol-based antioxidant, a phosphorus-based antioxidant, and a thioether-based antioxidant.

The lubricant is not particularly limited, but examples thereof include fatty acid amide-based lubricants, fatty acid ester-based lubricants, fatty acid-based lubricants, and fatty acid metal salt-based lubricants.

The crystal nucleating agent is not particularly limited, but examples thereof include sorbitol, phosphorus nucleating agents, rosins, petroleum resins, and the like.

The softener is not particularly limited, but examples thereof include a fluid paraffin, a mineral oil softener (processing oil) for non-aromatic rubber, and the like.

The antistatic agent is not particularly limited, but examples thereof include cationic antistatic agents, anionic antistatic agents, nonionic antistatic agents, amphoteric antistatic agents, and fatty acid partial esters such as glycerin fatty acid monoester.

The metal deactivator is not particularly limited, but examples thereof include a hydrazine-based metal deactivator, a nitrogen compound-based metal deactivator, and a phosphite-based metal deactivator.

The antibacterial or antifungal agent is not particularly limited, but examples thereof include organic compounds, natural organic antibacterial or antifungal agents, and inorganic antibacterial or antifungal agents.

The pigment is not particularly limited, but examples thereof include inorganic pigments and organic pigments.

Examples of the inorganic pigment include titanium oxide, calcium carbonate, and carbon black.

Examples of the organic pigment include azo pigments, acid dye lakes (レ - キ), basic dye lakes, and condensed polycyclic pigments.

In addition, as the additive, the following may be added within a range not impairing the effects of the invention:

nitrogen-based compound, metal hydroxide, silicone-based flame retardant, organic alkali metal salt, organic alkaline earth metal salt,

Boric acid compounds such as zinc borate, zinc metaborate, barium metaborate, aluminum borate and sodium polyborate, and the like,

Silicon compounds such as silicon oxide (silicon dioxide), synthetic amorphous silicon oxide (silicon dioxide), aluminum silicate, magnesium silicate, calcium silicate, zirconium silicate and diatomaceous earth, and the like,

Metal oxides such as aluminum oxide, magnesium oxide, barium oxide, titanium oxide, zinc oxide, tin oxide, zirconium oxide, molybdenum oxide, zirconium-antimony composite oxide, and

expandable graphite, and the like.

The above additives may be used alone in 1 kind, or may be used in combination in 2 or more kinds. The amount of the additive is not particularly limited as long as the properties of the flame-retardant resin composition are not impaired.

One embodiment of the flame-retardant resin composition of the present invention is essentially composed of components (a) to (D) and optional additives, and may further contain unavoidable impurities within a range not impairing the effects of the present invention.

In one embodiment of the flame-retardant resin composition of the present invention, for example, 80 to 100 mass%, 90 to 100 mass%, 95 to 100 mass%, 98 to 100 mass%, or 100 mass% may be composed of:

(A) component (C) to component (D), or

(A) Components (A) to (D), and optionally additives.

One embodiment of the flame-retardant resin composition of the present invention can be produced, for example, by blending the components (A) to (D) and, if necessary, additives and hot-melt mixing (kneading). The above components can be blended and kneaded by, for example, a henschel mixer, a banbury mixer, a single screw extruder, a twin screw extruder, a multi-shaft screw extruder, a kneader, or the like. The heating temperature during kneading is usually 160 to 250 ℃.

The components may be mixed and premixed by a commonly used apparatus (for example, a screw mixer, a tumbler, etc.), and then kneaded by the above apparatus.

The shape of one embodiment of the flame-retardant resin composition of the present invention includes particles.

One embodiment of the molded article of the present invention can be produced using the above-described flame-retardant resin composition.

The production can be carried out by, for example, injection molding, injection compression molding, extrusion molding, blow molding, press molding, vacuum molding, foam molding, or the like.

One embodiment of the molded article of the present invention can be suitably used for, for example, automobiles, industrial materials, building materials, electronic and electrical equipment, OA equipment, mechanical fields, home appliances, and home appliances (high-grade home appliances).

Examples

Examples 1 to 14 and comparative examples 1 to 9

[ production of flame-retardant resin composition ]

The components shown in tables 1 and 2 were melt-mixed at 200 ℃ and 250rpm using a twin-screw extruder PCM-30 (manufactured by Tokyo Seisaku K.K.) in the compounding ratios shown in tables 1 and 2 (parts by mass based on 100% by mass of the total of the contents of components (A) to (C), or based on 100 parts by mass of the total of the contents of components (A) to (C)), to produce pellets (flame-retardant resin compositions).

The ingredients used are shown below.

(A) Composition (I)

Resin A: j-700GP (homopolypropylene manufactured by Prime Polymer Co., Ltd., Melt Flow Rate (MFR) at 230 ℃ C.: 8.0g/10 min)

Resin B: j106MG (homopolymer propylene, manufactured by Prime Polymer Co., Ltd., MFR at 230: 15g/10 min)

Resin C: J707G (Prime Polymer, block Polypropylene, MFR at 230 ℃ C.: 30g/10 min)

(B) Composition (I)

Natural inorganic filler a: ILF-BAH (manufactured by Mitsubishi powder Co., Ltd., average particle diameter (D50): 17 μm, talc, water 0.04%, whiteness W92%, apparent specific gravity 0.4g/ml, 500 ℃ Heat loss 0.02%)

Natural inorganic filler B: jilin Prov. Lishu Dadingshan Wollastonite (manufactured by Hulan Wollastonite Mining Inc., Wollastonite, distribution: 400 mesh (ASTM standard) pass rate 98.2%)

(C) Composition (I)

Flame retardant A: CR-900 (manufactured by Daba chemical industries, Ltd., tris (tribromoneopentyl) phosphate, melting point: 182 ℃ and decomposition temperature: 313 ℃ (TGA (thermogravimetric analysis) 1% loss))

(D) Composition (I)

Radical generator a: NOFMER BC-90 (manufactured by Nichikou Co., Ltd., 2, 3-dimethyl-2, 3-diphenyl-butane, purity: 86%, melting point: 80-130 ℃ C., decomposition temperature: 140 ℃ C. (TGA (thermogravimetric analysis) 1% loss))

[ solution 1]

Radical generator B: CC-P3 (Poly-1, 4-diisopropylbenzene, a compound represented by the following formula, manufactured by United initiatives Co., Ltd., melting point: 105 to 135 ℃ and decomposition temperature: 170 ℃ (TGA 1% loss))

[ solution 2]

(A) The MFR of the component (B) was measured at 230 ℃ under 2.16kg in accordance with ASTM D-1238 (2013).

(B) In the component (A), the average particle diameter of the natural inorganic filler A is measured by a laser diffraction particle size distribution measuring apparatus LA-300 (manufactured by horiba, Ltd.).

(B) In the composition, the distribution of the natural inorganic filler B was measured by a 400 mesh net (ASTM standard) passing rate.

The 400 mesh passage rate was determined by placing a sample on a 400 mesh screen, sieving the sample with a vibrating screen, and determining the passage rate at that time.

(B) Among the components, the moisture content of the natural inorganic filler A was measured by the Karl Fischer method using a moisture measuring apparatus VA-06/CA-06 (manufactured by Mitsubishi chemical Co., Ltd.).

(B) Among the components, the whiteness W value of the natural inorganic filler a was measured by using an SM color calculator SM45 (manufactured by Suga tester).

(B) Of the components, the apparent specific gravity of the natural inorganic filler A is measured in accordance with JIS K5101.

(B) Of the components (A), 1g of the natural inorganic filler A was weighed out and measured at 500 ℃ for 3 hours using a muffle furnace F0610 (manufactured by Yamato scientific Co., Ltd.) for the 500 ℃ high-heat loss of the natural inorganic filler A.

(C) The melting points of component (A) and component (D) were measured by TGA/DSC1 (manufactured by METTLER TOLEDO Co.). The temperature was raised from 30 ℃ to 600 ℃ and the temperature was measured at a temperature raising rate of 20 ℃ per minute under an atmosphere of N2.

(C) The decomposition temperatures of component (A) and component (D) were measured by TGA/DSC 1. The temperature was raised from 30 ℃ to 600 ℃ and measured at a temperature raising rate of 20 ℃/min under an atmosphere of N2, and the temperature at which 1% by weight was reduced was defined as the decomposition temperature.

[ measurement of MFR of flame-retardant resin composition ]

The MFR of the resulting pellets was measured at 230 ℃ under 2.16kg in accordance with ASTM D-1238 (2013). The results are shown in tables 1 and 2.

[ production of molded article ]

The obtained pellets were dried at 80 ℃ and then molded at 200 ℃ by an injection molding machine ("NEX 110 III" manufactured by Nichisu resin industries Co., Ltd.) to produce UL test pieces (test pieces for UL94 test described below) (molded bodies) each having a thickness of 0.8mm or 1.6 mm.

[ measurement of antimony (Sb) content ]

The obtained particles and molded bodies were measured with an acceleration voltage of 20kV using an EDS (energy dispersive X-ray analysis) apparatus built in JSM-6390LA (manufactured by Nippon electronics Co., Ltd.). The results are shown in tables 1 and 2. "-" indicates below the detection limit (2000 ppm).

[ flame retardancy evaluation 1 (thickness: 0.8mm) ]

A UL test piece having a thickness of 0.8mm obtained in the production of a molded article was subjected to a vertical burning test (UL94 test) in accordance with UL94 standard using a flame retardancy evaluation tester (HVUL plastic UL burning test chamber, manufactured by Atlas). Specifically, 5 test pieces were given flame retardancy ratings according to UL94 standards based on the respective first and second burning times, whether cotton was on fire, and the like.

The results are shown in tables 1 and 2.

[ flame retardancy evaluation 2 (thickness 1.6mm) ]

Evaluation was performed in the same manner as in flame retardancy evaluation 1 except that a UL test piece having a thickness of 1.6mm obtained in the production of a molded article was used instead of the UL test piece having a thickness of 0.8 mm. The results are shown in tables 1 and 2.

[ Table 1]

[ Table 2]

While several embodiments and/or examples of the present invention have been described in detail above, those skilled in the art can easily make various modifications to these illustrated embodiments and/or examples without substantially departing from the novel teachings and effects of the present invention. Therefore, these various modifications are also included in the scope of the present invention.

The contents of the documents described in the present specification and the priority basic application based on the paris convention of the present application are incorporated in their entirety into the present specification.