JPH0977938A - Resin composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a resin compsn. excellent in abrasion resistance, sliding properties, and balance among flame retardancy, flowability in processing and mechanical properties. SOLUTION: This resin compsn. comprises 100 pts.wt. rubber-reinforced resin comprising (A) 10-60wt.% graft copolymer obtd. by graft polymn. of at least are kind of vinyl compd. with a ruffery polymer. and (B) 40-90wt.% alkyl (meth)acrylate copolymer in the form of a vinyl copolymer contg. a copolymer obtd. by copolymn. of at least are kind of vinyl compd., wherein at least one kind of vinyl compd. is an alkyl (meth)acrylate; (C) 1-40 pts.wt. halogen-contg. flame retardant; and (D) 0.1-10 pts.wt. polytetrafluoroethylene having a mol.wt. of 10,000 to lower than 1,000,000.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a flame-retardant composition having excellent wear resistance and slidability. For more information,
The present invention relates to a composition having excellent flame retardancy, abrasion resistance and slidability, which is used in the fields of automobile parts, OA equipment parts, electric appliances, furniture and the like.

[0002]

2. Description of the Related Art With the recent advances in office automation equipment and home appliances, products are becoming more compact and lightweight, and plastics are used instead of metal for housings, chassis, and the like. Such components such as chassis are often required to have high slidability and wear resistance depending on the environment in which they are used, and in addition, flame retardancy is required to improve the safety of OA equipment and home appliances.

In response to such demands, engineering plastics such as a highly flame-retardant polyphenylene ether resin and a resin composition composed of a polycarbonate resin and a fluororesin described in JP-A-1-138262 have been proposed as a chassis material. It is used. However, such resins do not have sufficient process fluidity.

Further, a resin composition comprising a polyamide resin and a fluororesin described in JP-A-62-223262 has been proposed, but not only the surface appearance and flame retardancy are not sufficient, but the content of the fluororesin is not sufficient. Many are economically disadvantageous.

On the other hand, A described in Japanese Examined Patent Publication No. 7-39529
The composition composed of the BS resin and the fluororesin has excellent flame retardancy, but has insufficient slidability. Generally, a rubber reinforced resin such as an ABS resin is excellent in mechanical characteristics and working fluidity, but the slidability is not sufficient and it is necessary to supplement the slidability by applying grease to the sliding portion.

As a method of imparting flame retardancy and slidability to a rubber-reinforced resin such as ABS resin which is a general-purpose resin, a halogen-based flame-retardant styrene-based thermoplastic resin and a polyolefin-based resin are disclosed in JP-A-6-107883. A method of adding a polymer has been proposed and has been effective to some extent.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to provide a flame-retardant resin composition which is excellent in wear resistance and slidability, mechanical strength and appearance of molded articles.

[0008]

As a result of intensive studies for solving the above problems, the present inventors have found that a rubber-reinforced resin such as ABS resin containing an alkyl (meth) acrylate component such as butyl acrylate, a halogen-based flame retardant. And the molecular weight is 1
The present invention has been found out that a composition consisting of 10,000 to less than 1 million polytetrafluoroethylene is a composition excellent in mechanical strength, abrasion resistance, slidability, and flame retardancy.

That is, the present invention comprises 10 to 60% by weight of a graft copolymer (A) obtained by graft-polymerizing one or more vinyl compounds to a rubber-like polymer, and one or more vinyl compounds. 100% by weight of a rubber-reinforced resin containing 40 to 90% by weight of an alkyl (meth) acrylate copolymer (B) in which at least one vinyl compound is an alkyl (meth) acrylate in the resulting vinyl copolymer containing the copolymer Halogen flame retardant (C)
A resin composition comprising 1 to 40 parts by weight and 0.1 to 10 parts by weight of polytetrafluoroethylene (D) having a molecular weight of 10,000 or more and less than 1 million.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail.

Graft copolymer (A) in the present invention
Indicates a graft copolymer obtained by graft-copolymerizing one or more vinyl compounds with a rubber-like polymer.

The rubbery polymer which is a component of the graft copolymer (A) can be used if it has a glass transition temperature of 0 ° C. or lower, preferably -20 ° C. or lower. Specifically, polybutadiene, styrene-
Diene rubber such as butadiene copolymer rubber, acrylonitrile-butadiene copolymer rubber, acrylic rubber such as polybutyl acrylate, polyisoprene, polychloroprene, ethylene-propylene rubber, ethylene-propylene-diene terpolymer rubber, styrene Block copolymers such as a butadiene block copolymer rubber and a styrene-isoprene block copolymer rubber, and hydrogenated products thereof can be used.

Among these polymers, polybutadiene, styrene-butadiene copolymer rubber, acrylonitrile-butadiene copolymer rubber, polybutyl acrylate and the like are preferable.

The proportion of the rubbery polymer in the graft copolymer (A) is used in the range of 1% by weight to 95% by weight, and it is determined according to the required mechanical strength, rigidity and molding processability. To be It is preferably 5 to 80% by weight, more preferably 10 to 75% by weight.

As the vinyl compound which is a component to be grafted on the rubbery polymer, styrene, α-methylstyrene,
Aromatic vinyl compounds such as paramethylstyrene, alkyl (meth) acrylates such as methyl methacrylate, methyl acrylate, butyl acrylate, and ethyl acrylate, (meth) acrylic acid such as acrylic acid and methacrylic acid, and cyan such as acrylonitrile and methacrylonitrile. Α, β such as vinyl chloride monomer and maleic anhydride
-Unsaturated carboxylic acid, N-phenylmaleimide, N-methylmaleimide, maleimide-based monomers such as N-cyclohexylmaleimide, and glycidyl group-containing monomers such as glycidylmethacrylate are preferred, but aromatic vinyl compounds are preferred. , Alkyl (meth) acrylates, vinyl cyanide monomers, and maleimide-based monomers, and more preferably styrene, acrylonitrile, N-phenylmaleimide, and butyl acrylate.

These vinyl compounds may be used alone or in combination of two or more. Preferably,
It is a combination of an aromatic vinyl compound and a non-aromatic vinyl compound. In this case, the aromatic vinyl compound and the non-aromatic vinyl compound are used in arbitrary proportions, but the preferable proportion of the non-aromatic vinyl compound is in the range of 5 to 80% by weight.

The proportion of the components grafted to the rubbery polymer produced in the process of producing the graft copolymer (A) is such that the polymer produced by the polymerization reaction is dissolved in acetone and the insoluble matter is separated and removed by a centrifuge. Can be measured by The component that dissolves in acetone is the component that has not undergone grafting reaction (non-grafting component) in the copolymer that has undergone polymerization reaction, and the value obtained by subtracting the amount of the rubbery polymer from the acetone insoluble content is defined as the value of the grafting component. It The ratio of the graft component is preferably 10% by weight of the rubbery polymer.
0 parts by weight is 10 to 80 parts by weight, and more preferably 20 to 60 parts by weight.

The method for producing the above graft copolymer (A) is not particularly limited, but for example, an emulsion graft polymerization method in which a vinyl compound is graft-polymerized to a rubbery polymer latex produced by bulk polymerization or emulsion polymerization, Any of a continuous type, a batch type and a semi-batch type is possible.

The alkyl (meth) acrylate-based copolymer (B) in the present invention is a vinyl copolymer containing a copolymer obtained by copolymerizing at least one vinyl compound, and at least one vinyl compound is It is a vinyl copolymer that is an alkyl (meth) acrylate.

Examples of vinyl compounds other than alkyl (meth) acrylates are aromatic vinyl compounds such as styrene, α-methylstyrene and paramethylstyrene, (meth) acrylic acids such as acrylic acid and methacrylic acid, acrylonitrile and methacrylonitrile. Vinyl cyanide monomer, α, β-unsaturated carboxylic acid such as maleic anhydride, N-phenylmaleimide, N-methylmaleimide,
Examples thereof include maleimide-based monomers such as N-cyclohexylmaleimide and glycidyl group-containing monomers such as glycidyl methacrylate.

Examples of the alkyl (meth) acrylate include methyl methacrylate, methyl acrylate, butyl acrylate, ethyl acrylate and the like.

Two or more of these vinyl compounds are used in combination, one of which is an alkyl (meth) acrylate, preferably butyl acrylate. When the alkyl (meth) acrylate is not contained as a component in the alkyl (meth) acrylate-based copolymer (B), the dropping of the resin during combustion is hindered, so that the burning continues without extinguishing the dropping, resulting in flame retardance. Is insufficient, and the moldability is reduced.

The proportion of alkyl (meth) acrylate in the alkyl (meth) acrylate copolymer (B) is preferably 0.1 to 25% by weight, more preferably 0.5 to 20% by weight, and particularly preferably 0.5 to 20% by weight. Preferably 1 to 15% by weight
It is.

The components other than the alkyl (meth) acrylate in the alkyl (meth) acrylate copolymer (B) are preferably aromatic vinyl compounds, vinyl cyanide monomers and maleimide monomers, and Aromatic vinyl compounds and vinyl cyanide compounds are preferred. In this case, the aromatic vinyl compound and the non-aromatic vinyl compound are used in arbitrary proportions, but the preferable proportion of the non-aromatic vinyl compound is in the range of 5 to 80% by weight. The aromatic vinyl compound is particularly preferably styrene, and the vinyl cyanide compound is particularly preferably acrylonitrile.

The alkyl (meth) acrylate-based copolymer (B) of the present invention may contain a non-graft component which does not copolymerize with the alkyl (meth) acrylate produced in the process of producing the graft copolymer (A). . In addition, the non-grafted component includes a component obtained by copolymerizing an alkyl (meth) acrylate produced in the process of producing the graft copolymer (A) and a vinyl copolymer not separately produced that does not copolymerize an alkyl (meth) acrylate. It may be a composition.

The proportion of the graft copolymer (A) and the alkyl (meth) acrylate copolymer (B) in the rubber-reinforced resin of the present invention is 1 for the graft copolymer (A).
0 to 60% by weight. Graft copolymer (A) is 10
If it is less than wt%, the mechanical strength will decrease. If the graft copolymer (A) exceeds 60% by weight, the process fluidity and flame retardancy will be reduced. The graft copolymer (A) is preferably 15 to 50% by weight, and particularly preferably 2
0 to 40% by weight.

The ratio of the graft copolymer (A) and the alkyl (meth) acrylate copolymer (B) in the rubber-reinforced resin is such that the rubber-reinforced resin is dissolved in acetone and the insoluble matter is separated and removed by a centrifuge. It can be measured by The component not dissolved in acetone is the graft copolymer (A), and the dissolved component is the alkyl (meth) acrylate-based copolymer (B).

The rubber-reinforced resin is produced by a usual method, for example, by emulsion polymerization to simultaneously prepare a graft copolymer (A) and an alkyl (meth) acrylate-based copolymer (B) which does not undergo graft polymerization, and then the rubber is reinforced. A method of solidifying a solid content from a resin latex by using a coagulant, and a vinyl copolymer which does not copolymerize a graft copolymer (A) and an alkyl (meth) acrylate with a high proportion of a rubber-like polymer by emulsion polymerization. An alkyl (meth) produced by producing a latex of a mixture (hereinafter sometimes abbreviated as GRC), coagulating a solid content using a coagulating agent in the same manner as described above, and separately performing bulk polymerization, emulsion polymerization, suspension polymerization, or the like. It is also possible to combine the acrylate with a copolymerized vinyl copolymer to obtain a desired rubber content. In this case, the vinyl copolymer that does not copolymerize the alkyl (meth) acrylate is a copolymer obtained by copolymerizing one or more vinyl compounds. The vinyl compound is preferably an aromatic vinyl compound, a vinyl cyanide compound, an acrylic acid ester or a methacrylic acid ester, more preferably a vinyl cyanide compound and an aromatic vinyl compound, and particularly preferably styrene or acrylonitrile. is there.

The halogen-based flame retardant (C) in the present invention refers to general halogen-based flame retardants in general and / or halogen-containing phosphoric acid esters in general.

For example, halogen-based flame retardants include hexachloropentadiene, hexabromodiphenyl, octabromodiphenyl oxide, tribromophenoxymethane, decabromodiphenyl, decabromodiphenyl oxide, octabromodiphenyl oxide, tetrabromobisphenol A, tetrabromo. Although there are phthalimide, hexabromobutene, hexabromocyclododecane, etc., a halogen compound having a structure of the following general formula (1-1) is preferable,

[0031]

Embedded image n = 0 or a natural number, X independently represents chlorine or bromine, i, j, k, and l are each an integer of 1 to 4, and R
And R'independently represent hydrogen, a methyl group, the following epoxypropyl group,

[0032]

Embedded image Phenyl group or the following formula (where m is 0, 1,
2 or 3)

[0033]

Embedded image Particularly preferred are halogen compounds represented by the following general formula (2-1).

[0034]

Embedded image n = 0 or a natural number, R and R ′ are each independently the following epoxypropyl group,

[0035]

Embedded image Or the following formula

[0036]

[Chemical 6] On the other hand, as the halogen-containing phosphate ester, tris / chloroethyl phosphate, tris / dichloropropyl phosphate, tris / β-chloropropyl phosphate, tris (tribromophenyl) phosphate, tris (dibromophenyl) phosphate, tris (tribromoneophosphate) are used. Pentyl phosphate) and condensed phosphoric acid esters thereof, etc., but preferably tris (tribromoneopentyl phosphate), tris (tribromophenyl) phosphate, tris (dibromophenyl)
It is a phosphate.

These halogen-based flame retardants (C) may be used alone or in combination of two or more.

The content of the halogen-based flame retardant (C) is determined according to the required level of flame retardancy.
It is 1 to 40 parts by weight with respect to 00 parts by weight. If it is less than 1 part by weight, the required flame retardant effect cannot be exhibited. If it exceeds 40 parts by weight, the mechanical strength of the resin is lowered. Preferably 3
-30 parts by weight, particularly preferably 5 to 25 parts by weight.

The polytetrafluoroethylene (D) in the present invention has a molecular weight of 10,000 or more and less than 1,000,000. When the molecular weight exceeds 1 million, in the UL94 vertical combustion test, the dropping of the resin during combustion is obstructed, so that the combustion continues without dropping fire and the flame retardancy is insufficient and the sliding property The imparting effect is not sufficient. The molecular weight is 1
If it is less than 10,000, the durability of the slidability is lost, and the wear resistance and slidability are not sufficient. The molecular weight of polytetrafluoroethylene (D) is preferably 10,000 to 50.
10,000, and particularly preferably 20,000 to 200,000.

The content of polytetrafluoroethylene (D) is 0.1 to 1 with respect to 100 parts by weight of the rubber-reinforced resin.
0 parts by weight. When the amount is less than 0.1 parts by weight, the slidability is not sufficient, and when the amount is more than 10 parts by weight, the appearance is deteriorated such as the impact resistance being lowered and the gloss being lowered. Preferably 0.5
To 20 parts by weight, and particularly preferably 1 to 5 parts by weight.

The molecular weight of polytetrafluoroethylene (D) in the present invention is a value calculated according to the following formula by the DSC method described in Journal of Applied Polymer Science 17: 3253 (1973).

Mn = 2.1 × 10 ¹⁰ ΔHc ^−5.16 (In the formula, Mn is the number average molecular weight, ΔHc is the heat of crystallization and the unit is cal / g.) Further, the composition of the present invention has a flame retardant effect. Flame retardant aids can be used to increase the The flame retardant aid is preferably a compound and / or oxide containing an element belonging to B in the periodic table of elements, and specific examples thereof include a nitrogen-containing compound, a phosphorus-containing compound, antimony oxide and bismuth oxide. Further, metal oxides such as iron oxide, zinc oxide and tin oxide are also effective. Of these, antimony oxide is particularly preferable, and specific examples thereof include antimony trioxide and antimony pentoxide. These flame-retardant aids may be those which have been subjected to a surface treatment for the purpose of improving dispersion in the resin and / or improving the thermal stability of the resin.

The content of the flame retardant aid is 100% by the rubber reinforced resin.
0.5 to 20 parts by weight is preferable with respect to parts by weight, 0.5
If it is less than 20 parts by weight, the effect of the flame retardant aid tends to be insufficient, and if it exceeds 20 parts by weight, the mechanical strength and processing fluidity of the resin tend to be lowered. More preferably 1
15 parts by weight, particularly preferably 1 to 10 parts by weight.

In the composition of the present invention, any additive for the purpose of modification, that is, a lubricant such as calcium stearate, a lubricant such as silicone oil or olefin oil, an antistatic agent, an antioxidant, An ultraviolet absorber, a colorant, a surface modifier, a plasticizer and the like can be added.

The method for producing the composition of the present invention is not particularly limited, but it is produced by a conventional method such as melt blending by extruder kneading, a method of adding other components during the polymerization of the rubber-reinforced resin, solvent blending and the like. can do.

Further, the use of the composition of the present invention is not particularly limited, but it can be used, for example, in the use required to have slidability and flame retardancy. Specifically, the housing of OA equipment, the housing of home appliances, C of the CD-ROM
It can be used as a D tray material.

[0047]

The present invention will be described in detail with reference to the following examples. Hereinafter, “part” means “part by weight”.

The components used in Examples and Comparative Examples will be described below.

(Rubber Reinforcement Resin) (Production of GRC (G-1)) Polybutadiene rubber latex (MODEL-600 manufactured by CN WOOD Co., Ltd.)
100 parts of deionized water and 1.5 parts of potassium rosinate were added to 40 parts of the solid content (weight average particle diameter of 300 nm measured by type 0), the gas phase was replaced with nitrogen, and the temperature was raised to 70 ° C.

Then, 25 parts of acrylonitrile, 35 parts of styrene, 0.6 parts of tertiary decyl mercaptan.
Part, a monomer mixture consisting of 0.1 part of cumene hydroperoxide, 50 parts of deionized water, 0.2 part of sodium formaldehyde sulfoxylate and 0.004 parts of ferrous sulfate.
Parts, ethylenediaminetetraacetic acid disodium salt 0.0
An aqueous solution prepared by dissolving 4 parts was added over 7 hours,
The reaction was completed at a polymerization temperature of 0 ° C.

The ratio of the graft component in the obtained GRC was 51 parts by weight with the rubbery polymer as 100 parts by weight, and the component in GRC was FT-IR (JASCO).
As a result of quantitative analysis by FT / IR-7000 manufactured by Co., Ltd., the butadiene component was 40% by weight, the acrylonitrile component was 25% by weight, and the styrene component was 35% by weight.

(Production of GRC (G-2)) The same procedure as in GRC (G-1) was carried out except that 18 parts of acrylonitrile and 42 parts of styrene in the monomer mixture solution were used.

The ratio of the graft component in the obtained GRC was 50 parts by weight based on 100 parts by weight of the rubbery polymer, and the components in GRC were 40% by weight of butadiene component, 18% by weight of acrylonitrile component and styrene. The component was 42% by weight.

(Production of GRC (G-3)) The same procedure as GRC (G-1) was carried out except that 15 parts of acrylonitrile and 45 parts of styrene in the monomer mixture were used.

The proportion of the graft component in the obtained GRC was 45 parts by weight based on 100 parts by weight of the rubbery polymer, and the components in GRC were 40% by weight of the butadiene component, 15% by weight of the acrylonitrile component and styrene. The component was 45% by weight.

(Vinyl Copolymer) (Vinyl Copolymer T-1 Copolymerized with Alkyl (meth) acrylate) Ethylbenzene is used as a solvent for acrylonitrile, styrene and butyl acrylate, and the above mixture is continuously added to a polymerization reactor. And the temperature of the polymerization system was controlled to 120 to 130 ° C. to carry out the polymerization reaction. Then, the unreacted monomer was removed under vacuum to obtain a solid powder of the copolymer.

40% by weight of acrylonitrile, 11% by weight of butyl acrylate and 49% of styrene in the copolymer.
% By weight. The intrinsic viscosity measured in methyl ethyl ketone (solution in which 0.5 g of copolymer was dissolved in 100 ml of methyl ethyl ketone, 30 ° C.) was 0.42.

(Vinyl Copolymer T-2 Copolymerized with Alkyl (Meth) Acrylate) It was obtained in the same manner as in Copolymer T-1 except that the compositions of acrylonitrile, styrene and butyl acrylate were changed.

The content of acrylonitrile in the copolymer is 3
It was 0% by weight, 10% by weight of butyl acrylate and 60% by weight of styrene. Also, the intrinsic viscosity measured in methyl ethyl ketone (a solution in which 0.5 g of the copolymer was dissolved in 100 ml of methyl ethyl ketone, 30 ° C.) was 0.55.

(Vinyl Copolymer T-3 Copolymerized with Alkyl (meth) acrylate) It was obtained in the same manner as in Copolymer T-1 except that the compositions of acrylonitrile, styrene and butyl acrylate were changed.

The content of acrylonitrile in the copolymer is 2
5 wt%, butyl acrylate 9 wt%, styrene 6
It was 6% by weight. The intrinsic viscosity measured in methyl ethyl ketone (0.5 g of copolymer dissolved in 100 ml of methyl ethyl ketone, 30 ° C.) was 0.51.

(Vinyl copolymer S) acrylonitrile,
Using ethylbenzene as a solvent and continuously adding the above mixture to the polymerization reactor, the temperature of the polymerization system was adjusted to 12
The polymerization reaction was performed by controlling at 0 to 130 ° C. Then, the unreacted monomer was removed under vacuum to obtain a solid powder of the copolymer.

The acrylonitrile content in the copolymer was 30% by weight, and the styrene content was 70% by weight. Also, the intrinsic viscosity measured in methyl ethyl ketone (methyl ethyl ketone 10
A solution of 0.5 g of the copolymer dissolved in 0 ml, 30 ° C)
Was 0.53.

(Halogen flame retardant C) C-1 is tribromobisphenol A.

C-2 is a tribromphenol-terminated halogenated compound (softening point of 100 in which R and R'are both represented by formula (2-3) in formula (2-1).
° C).

C-3 is a halogen compound (softening point 97 ° C.) in which R and R ′ are both represented by the formula (2-2) in the general formula (2-1).

(Polytetrafluoroethylene (PTF
E) D) (Component D-1) Polytetrafluoroethylene having a molecular weight of 30,000.

(Component D-2) Polytetrafluoroethylene having a molecular weight of 40,000.

(High molecular weight PTFE) Polytetrafluoroethylene having a molecular weight of 3,000,000.

(Examples 1 to 10 and Comparative Examples 1 to 4) The components prepared as described above were used in the compositions (unit: parts by weight) listed in Tables 1 and 2 and the cylinder temperature was set to 220 ° C. After kneading and granulating with a twin-screw extruder, a test piece for measuring physical properties was obtained using an injection molding machine (cylinder temperature 240 ° C., mold temperature 45 ° C.). A flammability test piece was obtained from a flat plate compression-molded at 220 ° C. Tables 1 and 2 list the results of evaluation using the test pieces obtained. In addition, in Tables 3 and 4, the graft copolymer (A) + alkyl (meth) acrylate-based copolymer (B) + vinyl copolymer S = 100 parts by weight of the graft copolymer (A) and the alkyl The ratio (unit is parts by weight) of the (meth) acrylate-based copolymer (B) is shown.

[0071]

[Table 1]

[0072]

[Table 2]

[0073]

[Table 3]

[0074]

[Table 4] Sliding property is reciprocating friction wear tester (Toseki Seimitsu Kogyo Co., Ltd.)
Manufactured by AFT-15MS). The test piece used for evaluation by surface appearance is fixed to a sample stand, and a steel ball is pressure-bonded (load 3 kg) to the gloss measurement portion. As it is, the test table is reciprocated at a constant speed (30 mm / s).
(It ends 0 times), and the frictional force at this time is detected by a strain gauge type load detector to measure the friction coefficient. Measurement temperature is 2
3 ° C. The amount of wear was measured by measuring the depth of the worn part of the sample after the measurement using a surface roughness meter. The unit is μm.

The flame retardancy is a test based on the UL94 vertical combustion test (thickness 1/8 inch, 1/12 inch, and 1/16 inch), and the flame retardancy less than V-2 is x.
Was written.

Izod impact value is ASTM D256
The unit is kg · cm / cm in measurement based on (test piece thickness 1/4 inch, notched).

The processing fluidity was evaluated by the melt flow rate. The melt flow rate is measured based on ISOR1133 (200 ° C., 5 kg load), and the unit is g / 10 min.

The surface appearance is measured by measuring the gloss (JIS Z87
41), the value of the gate part of the molded piece was 8
5 or more was marked with ◯, and 85 or less was marked with x. The larger the value, the better the gloss of the surface of the molded piece, and the more preferable the surface appearance.

[0079]

The resin composition of the present invention has excellent wear resistance and slidability, and has an excellent balance of flame retardancy, process fluidity and mechanical properties.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location C08L 33/06 LJC C08L 33/06 LJC LJD LJD 51/04 LKX 51/04 LKX LKY LKY

Claims (3)

[Claims] 1. A graft copolymer (A) 1 obtained by graft-polymerizing one or more vinyl compounds to a rubber-like polymer.
An alkyl (meth) acrylate-based copolymer in which at least one vinyl compound is an alkyl (meth) acrylate in a vinyl copolymer containing a copolymer obtained by copolymerizing 0 to 60% by weight and one or more vinyl compounds. 1 to 40 parts by weight of a halogen-based flame retardant (C), and polytetrafluoroethylene having a molecular weight of 10,000 to less than 1 million (100 parts by weight of a rubber-reinforced resin composed of 40 to 90% by weight of a polymer (B) ( D) A resin composition comprising 0.1 to 10 parts by weight. 2. The resin composition according to claim 1, wherein the proportion of the alkyl (meth) acrylate in the alkyl (meth) acrylate copolymer (B) is 0.1 to 25% by weight. Stuff. 3. The resin composition according to claim 1 or 2, wherein the alkyl (meth) acrylate in the alkyl (meth) acrylate-based copolymer (B) is butyl acrylate.