JPH09279006A - Sliding resin composition and molded product formed from the same - Google Patents

Abstract

(57) [Abstract] (Correction) [PROBLEMS] To provide a polycarbonate resin having excellent friction and wear characteristics, impact resistance and rigidity, and excellent moldability of a thin portion. SOLUTION: (A) Polycarbonate resin (a component), (B) Polytetrafluoroethylene resin (b component), (C) Polyethylene resin (c component), (D) Diene rubber component and vinyl cyanide compound. Thermoplastic graft copolymer grafted with aromatic vinyl compound (d component), (E) scale-like inorganic filler (e component), (F) in the presence of rubber methacrylic acid ester, acrylic acid ester and aromatic vinyl compound One or two or more in an elastic copolymer obtained by copolymerizing two or more kinds of monomers selected from the group consisting of and / or a composite rubber composed of a polyorganosiloxane rubber component and a polyalkyl (meth) acrylate rubber component. Sliding resin composed of a composite rubber graft copolymer (f component) obtained by graft-polymerizing the vinyl monomer of (1) and a flame retardant (g) of (G) Composition.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a polycarbonate resin composition excellent in slidability and a molded article formed from the same. More specifically, the present invention relates to a polycarbonate resin composition excellent in friction and wear characteristics, impact resistance and rigidity and excellent in moldability of a thin portion, and a molded product formed from the same.

[0002]

2. Description of the Related Art Polycarbonate resins such as 2,2-
Polycarbonate resin obtained by reacting bis (4-hydroxyphenyl) propane (hereinafter referred to as bisphenol A) with a carbonate precursor has excellent mechanical strength, electrical characteristics, etc.
It is widely used in various fields such as the electronic device field and the automobile field, and in particular, it is widely used for parts of OA equipment. However, recently, for sliding parts of office automation equipment,
The number of cases requiring materials with excellent sliding properties is increasing. Conventionally, grease or oil was applied to improve sliding characteristics, but when grease or oil is applied in recent precision machines, the grease or oil particles may adversely affect internal parts. It is required to improve the sliding characteristics of the material itself. A method of blending a polytetrafluoroethylene resin has been proposed as a method of improving the sliding characteristics of a polycarbonate resin. However, blending a polytetrafluoroethylene resin with a polycarbonate resin causes a problem that molding processability and impact strength are lowered. In order to solve this problem, a method of blending a polycarbonate resin with a polyethylene resin together with a polytetrafluoroethylene resin (JP-A-48-40849 and JP-A-7-2287).
No. 63) is proposed. However, although this method improves the reduction of impact strength, it does not sufficiently improve the molding processability, and high-pressure and high-speed molding is required especially when a thin-walled molded product is injection-molded. Therefore, a material having poor moldability causes a problem in dimensional accuracy (particularly warpage) of the molded product. In addition, when the molding temperature, especially the mold temperature, is increased to perform continuous molding, the polyethylene resin bleeds out and adheres to the mold. Therefore, improvement in moldability has been required. Further, further rigidity is required depending on the application. As a method of improving the rigidity of a polycarbonate resin, a method of blending glass fiber or carbon fiber is known. However,
When a fibrous reinforcing material is mixed with a polycarbonate resin and a molded product with a particularly thin wall is injection-molded, warpage is likely to occur,
It was difficult to obtain a good molded product.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a polycarbonate resin which is excellent in friction and wear characteristics, impact resistance and rigidity, and is excellent in moldability of a thin portion.

As a result of intensive studies to achieve the above object, the present inventor has found that a polycarbonate resin, a polytetrafluoroethylene resin, a polyethylene resin having a specific molecular weight, a thermoplastic graft copolymer, a scale-like inorganic filler and a specific filler. By blending an elastic copolymer, it has excellent friction and wear characteristics, impact resistance and rigidity, and also has excellent moldability for thin-walled parts. The resulting molded product has good dimensional accuracy and, in addition, bleed of polyethylene resin. It has been found that out-out and die adhesion can be prevented, and as a result, a molded product having a good appearance can be obtained. As a result of further studies based on these findings, the present invention has been completed.

[0005]

According to the present invention, (A) a polycarbonate resin (a component), (B) a polytetrafluoroethylene resin (b component), and (C) a viscosity average molecular weight of 1,
000-10,000 polyethylene resin (component c),
(D) a thermoplastic graft copolymer obtained by grafting a vinyl cyanide compound and an aromatic vinyl compound on a diene rubber component (d component), (E) a scale-like inorganic filler (e component),
(F) Elastic co-polymer obtained by copolymerizing two or more kinds of monomers selected from the group consisting of methacrylic acid ester, acrylic acid ester and aromatic vinyl compound in the presence of rubber containing a repeating unit derived from butadiene. One or two or more vinyl monomers are grafted onto a composite rubber having a structure in which a united and / or polyorganosiloxane rubber component and a polyalkyl (meth) acrylate rubber component are intertwined with each other so that they cannot be separated. It is composed of a composite rubber-based graft copolymer (f component) and (G) flame retardant (g component) which are polymerized, and when the total of the four components a to d is 100% by weight, the a component is 45 to 95. 0.5% by weight, b component is 1 to 30
% By weight, 0.5 to 7% by weight of c component and 3 to 5 of d component
It is 3.5% by weight, and the e component is 3 to 50 parts by weight and the f component is 1 to 20 with respect to a total of 100 parts by weight of the four components a to d.
The present invention relates to a slidable resin composition having 0 to 30 parts by weight and a g component.

The polycarbonate resin used as the component a in the present invention is an aromatic polycarbonate resin obtained by reacting a dihydric phenol with a carbonate precursor.
Typical examples of the dihydric phenol used here include bisphenol A, bis (4-hydroxyphenyl) methane,
1,1-bis (4-hydroxyphenyl) ethane, 2,
2-bis (4-hydroxy-3,5-dimethylphenyl) propane, 2,2- (4-hydroxy-3-methylphenyl) propane, bis (4-hydroxyphenyl)
Examples include sulfone. Preferred dihydric phenols are bis (4-hydroxyphenyl) alkane-based, with bisphenol A being especially preferred. Examples of the carbonate precursor include carbonyl halide, carbonyl ester, haloformate, and the like, and specific examples include phosgene, diphenyl carbonate, dihaloformate of dihydric phenol, and the like. In producing a polycarbonate resin by reacting the above dihydric phenol and a carbonate precursor, the dihydric phenol may be used alone, or two or more may be used in combination, if necessary, a suitable molecular weight modifier, A branching agent, a catalyst, etc. are also used. Further, the polycarbonate resin may be a branched polycarbonate resin obtained by copolymerizing a trifunctional or higher polyfunctional aromatic compound or a mixture of two or more kinds of polycarbonate resins.

The molecular weight of such a polycarbonate resin is
Viscosity-average molecular weight 10,000-50,000
Is suitable, and 15,000 to 30,000 is preferable. With a polycarbonate resin having a viscosity average molecular weight of less than 10,000, the strength of the resulting molded article is insufficient, and with a polycarbonate resin having a viscosity average molecular weight of more than 50,000, the moldability of the thin portion becomes poor. The viscosity average molecular weight (M) in the present invention is obtained by inserting the specific viscosity (η _sp ) obtained from a solution of 0.7 g of polycarbonate resin dissolved in 100 ml of methylene chloride at 20 ° C. into the following equation.

Η _sp /C=[η]+0.45×[η] ² C [η] = 1.23 × 10 ^-4 M ^0.83 (where [η] is the intrinsic viscosity and C is the polymer concentration) And 0.7.) Means for producing a polycarbonate resin will be briefly described. In the solution method using phosgene as a carbonate precursor, the reaction is usually performed in the presence of an acid binder and an organic solvent. As the acid binder, for example, an alkali metal hydroxide such as sodium hydroxide or potassium hydroxide or an amine compound such as pyridine is used. As the organic solvent, for example, a halogenated hydrocarbon such as methylene chloride or chlorobenzene is used. In order to accelerate the reaction, a catalyst such as a tertiary amine or a quaternary ammonium salt can be used,
Examples of the molecular weight regulator include phenol and p-tert-
It is desirable to use an end-capping agent such as an alkyl-substituted phenol such as butylphenol. The reaction temperature is usually 0 to
40 ° C, reaction time is several minutes to 5 hours, pH during reaction is 10
It is preferable to keep above.

In the transesterification reaction (melting method) using a carbonic acid diester as a carbonate precursor, a predetermined amount of dihydric phenol is stirred while heating with a carbonic acid diester in the presence of an inert gas to remove the alcohol or phenols produced. Distill. The reaction temperature varies depending on the boiling point of the alcohol or phenols produced, but is usually 120 to 3
It is in the range of 00 ° C. The reaction is completed while distilling off alcohol or phenols produced by reducing the pressure from the beginning. Also, a transesterification catalyst can be used to accelerate the reaction. Examples of carbonic acid diesters used in this transesterification reaction include diphenyl carbonate, dinaphthyl carbonate, dimethyl carbonate, diethyl carbonate, dibutyl carbonate and the like. Of these, diphenyl carbonate is particularly preferred.

The polytetrafluoroethylene resin used as the component b in the present invention is usually used as a dry lubricant. It is preferably in the form of fine powder, and the particle size of the fine powder is 0.1 to 100 μm on average in a method of measuring a dispersion liquid dispersed in perchlorethylene by a light transmission method.
Are preferred. The melting point of the polytetrafluoroethylene resin is preferably 320 ° C. or higher as measured by the DSC method. Since the polytetrafluoroethylene resin easily re-aggregates, some polytetrafluoroethylene resins have been subjected to a baking treatment or the like to make it difficult to re-aggregate, and these are also preferably used. Polytetrafluoroethylene resin is available from Daikin Industries, Ltd. as Lubron L-5 and L-2, and from Asahi Ishi-iFluoropolymers Co., Ltd. L150J, L169J, L17.
0J and L172J, and Teflon TLP-10F-1 from Mitsui DuPont Fluorochemicals Co., Ltd., and are easily available.

The polyethylene resin used as the component c in the present invention may be a commercially available one, but its viscosity average molecular weight must be in the range of 1,000 to 10,000. 7,000 to 7,000
Are preferred. Viscosity average molecular weight is 1,000
If it is less than the above, it is difficult to obtain sufficient friction and wear characteristics,
If it exceeds 10,000, delamination is likely to occur in the molded product, resulting in poor appearance. In particular, by using polyethylene in the above range, a molded product having an excellent appearance and excellent impact strength and weld strength can be obtained.

Such a polyethylene resin can be used by modifying it by introducing a polar group such as an acid, an ester, an acid anhydride group or an epoxide group in order to increase the affinity with the polycarbonate resin. It is also preferable.

The thermoplastic graft copolymer used as the component d in the present invention is a resin usually called ABS resin. As the diene rubber component forming the thermoplastic graft copolymer, for example, a rubber having a glass transition point of 10 ° C. or lower, such as polybutadiene, polyisoprene, or styrene-butadiene copolymer, is used, and the ratio thereof is 5 in the d component. ~
It is preferably 80% by weight. Examples of the vinyl cyanide compound grafted to the diene rubber component include acrylonitrile and methacrylonitrile. The content ratio of the vinyl cyanide compound in the d component is preferably 50 to 5% by weight. Further, examples of the aromatic vinyl compound grafted to the diene rubber component include styrene, α-methylstyrene, and nucleus-substituted styrene, and the content ratio of the aromatic vinyl compound in the d component is 50 to 95% by weight. Is preferred. Further methyl (meta)
Acrylate, ethyl acrylate, maleic anhydride,
N-substituted maleimide or the like can be mixed and used. This thermoplastic graft copolymer may be produced by any of bulk polymerization, suspension polymerization and emulsion polymerization, and the copolymerization method may be one-step copolymerization or multi-step copolymerization. Good. The thermoplastic graft copolymer can be used not only in one kind but also in a mixture of two or more kinds.

The blending ratios of the components a to d are 45 to 95.5% by weight of the component a, 1 to 30% by weight of the component b, and 0.5 to 7% by weight of the component c, when the total amount thereof is 100% by weight. %, D component 3 to 53.5% by weight. If the component a is less than 45% by weight, the heat resistance (particularly the deflection temperature under load) tends to decrease, while if it exceeds 95.5% by weight, the fluidity decreases and the moldability deteriorates. If the content of b component is less than 1% by weight, it is difficult to obtain sufficient friction and wear resistance, and 30% by weight
If it exceeds, the mechanical strength (impact resistance) will decrease. If the component c is less than 0.5% by weight, it is difficult to obtain sufficient friction and wear properties, and if it exceeds 7% by weight, delamination is likely to occur in the molded product and the appearance is deteriorated. If the d component is less than 3% by weight, it is difficult to obtain sufficient molding workability.
If it exceeds 3.5% by weight, heat resistance (deflection temperature under load) and mechanical strength (impact resistance) will decrease.

The scale-like inorganic filler used as the component e in the present invention imparts heat resistance and rigidity to the resulting composition. Examples of the scale-like inorganic filler include talc and mica. You can The inorganic filler of the component e needs to be scaly, and if an inorganic filler other than scaly is used, for example, glass fiber, carbon fiber, or other fibrous inorganic filler, rigidity can be obtained but appearance And deterioration of the molded product will occur. The average particle diameter of the inorganic filler of the component e is preferably about 1.2 to 3.5 μm. The blending amount is 3 to 50 parts by weight based on 100 parts by weight of the total of the four components a to d. If it is less than 3 parts by weight, it is difficult to obtain sufficient rigidity, and if it exceeds 50 parts by weight, the mechanical strength (particularly impact resistance) is lowered.

The impact strength tends to be lowered by blending the above-mentioned component e. In order to improve this decrease in impact strength, an elastic copolymer (F) or a composite rubber-based graft copolymer can be blended, which is preferable. The elastic copolymer which is one of the component f used here is at least two kinds selected from the group consisting of methacrylic acid ester, acrylic acid ester and aromatic vinyl compound in the presence of rubber containing a repeating unit derived from butadiene. It is obtained by copolymerizing the above monomer. Examples of the rubber containing a repeating unit derived from butadiene include polybutadiene, butadiene-styrene copolymer, butadiene-acrylonitrile copolymer, butadiene-acrylic acid ester copolymer and the like. Examples of the methacrylic acid ester include methyl methacrylate, ethyl methacrylate, butyl methacrylate, octyl methacrylate and the like. Examples of the acrylate ester include methyl acrylate, ethyl acrylate, butyl acrylate, octyl acrylate and the like. Examples of the aromatic vinyl compound include styrene, α-methylstyrene,
Examples thereof include p-methylstyrene, alkoxystyrene, halogenated styrene and the like. The elastic copolymer may be produced by any polymerization method such as bulk polymerization, solution polymerization, suspension polymerization and emulsion polymerization, and the copolymerization method may be single-stage graft or multi-stage graft. It doesn't matter. Further, a copolymer containing only a graft component produced as a by-product during the production may be mixed. Such elastic copolymers are commercially available and can be easily obtained. For example, Kaneace Chemical Co., Ltd.'s Kane Ace B series, Mitsubishi Rayon Co., Ltd.'s Metabrene C series, Kureha Chemical Co., Ltd.'s EXL series, HIA series, BTA series, K
CA series etc. are mentioned.

The composite rubber-based graft copolymer, which is another component f, is a composite rubber having a structure in which the polyorganosiloxane rubber component and the polyalkyl (meth) acrylate rubber component are intertwined with each other so that they cannot be separated. Is a composite rubber-based graft copolymer obtained by graft-polymerizing one or more vinyl-based monomers. In order to obtain the composite rubber-based graft copolymer used in the present invention, first, various cyclic organosiloxanes having three or more members, such as hexamethylcyclotrisiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and a cross-linking agent. And / or a polyorganosiloxane rubber latex is prepared by emulsion polymerization using a graft crossing agent, and then the poly (organosiloxane) rubber latex is impregnated with an alkyl (meth) acrylate monomer, a crosslinking agent and a graft crossing agent. It is obtained by polymerizing after that. Examples of the alkyl (meth) acrylate monomer used herein include alkyl acrylates such as methyl acrylate, ethyl acrylate, n-propyl acrylate, n-butyl acrylate and 2-ethylhexyl acrylate, and alkyl methacrylates such as hexyl methacrylate and 2-ethylhexyl methacrylate. Among them, n-butyl acrylate is particularly preferable. Vinyl-based monomers that are graft-polymerized to this composite rubber include styrene and α
-Aromatic vinyl compounds such as methylstyrene, vinyl cyanide compounds such as acrylonitrile and methacrylonitrile, methacrylic acid esters such as methyl methacrylate and 2-ethylhexyl methacrylate, acrylic acid esters such as methyl acrylate, ethyl acrylate and butyl acrylate. These may be used alone or in combination of two or more. Particularly preferred is Metabrene S-2001 or R from Mitsubishi Rayon Co., Ltd.
Examples thereof include those marketed under the trade names of K-120 and RK-200.

The amount of the component f is preferably 1 to 20 parts by weight based on 100 parts by weight of the four components a to d. 1
If it is less than 20 parts by weight, it is difficult to obtain sufficient impact improvement, and if it exceeds 20 parts by weight, heat resistance and rigidity are deteriorated.

A flame retardant (G) can be added to the slidable resin composition of the present invention consisting of the above six components a to f to impart further flame retardancy. It is preferable to do so. is there. The flame retardant that is the g component used here is a flame retardant that can be used for the a component or the d component, and a halogen-based or phosphorus-based flame retardant is preferable. Examples of halogen-based flame retardants include aromatic halogen compounds, halogenated epoxy resins, halogenated polycarbonate resins, halogenated aromatic vinyl polymers, halogenated cyanurate resins, halogenated polyphenyl ethers, halogenated polyphenyl thioethers, and the like. Preferably, decabromodiphenyl oxide, brominated bisphenol epoxy resin, brominated bisphenol phenoxy resin, brominated bisphenol polycarbonate resin, brominated polystyrene resin, brominated crosslinked polystyrene resin, brominated bisphenol cyanurate resin, brominated Polyphenylene oxide, polydibromophenylene oxide, decabromodiphenyl oxide bisphenol condensate (tetrabromobisphenol A, its Goma, and the like). Examples of the phosphorus-based flame retardants include non-halogen phosphates such as trimethyl phosphate, triethyl phosphate, tributyl phosphate, trioctyl phosphate, tributoxycotyl phosphate, triphenyl phosphate, tricresyl phosphate, cresyl diphenyl phosphate, and octyl diphenyl phosphate. , Tris (chloroethyl) phosphate, tris (dichloropropyl) phosphate, bis (2,3-dibromopropyl) -2,3-dichloropropylphosphate, tris (2,3-dibromopropyl) phosphate, bis (chloropropyl) monooctyl Halogen-containing phosphate esters such as phosphates and the like can be mentioned. The compounding amount of the g component is 1 to 30 parts by weight based on 100 parts by weight of the total of the four components a to d. If it is less than 1 part by weight, it is difficult to obtain a sufficient flame retardant effect, and if it exceeds 30 parts by weight, the thermal stability at the time of molding tends to be deteriorated.

Flame retardant aids may be used to increase the effectiveness of the flame retardant. Examples of flame retardant aids include molybdenum compounds, antimony compounds, and the like, and particularly preferred are sodium antimonate and antimony trioxide. In addition, polytetrafluoroethylene having a fibril forming ability can be used to further improve the flame retardancy. Polytetrafluoroethylene having fibril-forming ability is Type II in ASTM standard.
It is classified as I. Polytetrafluoroethylene having a fibril-forming ability has a drip-preventing performance at the time of a combustion test of a test piece in a vertical burning test of UL standard, and polytetrafluoroethylene having such a fibril-forming ability is more flame-retardant. It gives an effect. Such polytetrafluoroethylene having the ability to form fibrils is commercially available, for example, as Teflon 6J from Mitsui DuPont Fluorochemicals Co., Ltd. or as polyflon from Daikin Chemical Industry Co., Ltd. The amount of polytetrafluoroethylene having fibril forming ability is 1 in total of the four components a to d above.
0.1 to 1 part by weight is preferable with respect to 00 parts by weight. 0.
If it is less than 1 part by weight, it is difficult to obtain sufficient melt dripping prevention performance, and if it exceeds 1 part by weight, the appearance becomes poor.

The resin composition of the present invention can be produced by mixing the above components with a mixer such as a tumbler, a V-type blender, a Nauter mixer, a Banbury mixer, a kneading roll and an extruder. Further, other resins such as polyester, polyamide, polyphenylene ether and the like may be mixed within a range not impairing the object of the present invention, and if necessary, various additives such as stabilizers and stabilizers may be added in such an amount that the effect is exhibited. A mold agent, an antistatic agent, an ultraviolet absorber, a dye or pigment, etc. may be contained. For example, a phosphite ester-based or phosphoric acid ester-based heat stabilizer is particularly preferable. The resin composition thus obtained can be easily molded by methods such as extrusion molding, injection molding and compression molding, and can also be applied to blow molding, vacuum molding and the like, and is most suitable as a sliding part for electronic / electrical and OA. .

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be further described below with reference to examples. In the examples, parts and% are parts by weight and% by weight, respectively.

(1) Rigidity: The flexural modulus (kgf / cm ² ) was measured according to ASTM D-790.

(2) Impact resistance (kgf.cm/cm); ASTM
The impact with Izod notch (thickness 3.2 mm) was measured according to D-256.

(3) Heat resistance: The deflection temperature under load (° C.) was measured under a load of 18.6 kgf / cm 2 according to ASTM D-648.

(4) Formability: Cylinder temperature 260
The flow length was measured by an Archimedes-type spiral flow (thickness 2 mm) at a temperature of ℃ and injection pressure of 1,000 kgf / cm 2.
A thin moldability of 25 cm or more is good. If it was 25 cm or more, it was evaluated as ◯, and if less than 25 cm, it was evaluated as x.

(5) Appearance: A square plate of 50 × 80 × 2 mmt was visually measured. Good appearances are indicated by ◯, and inorganic appearances caused by the appearance of poor quality and polyethylene resin caused by delamination are indicated by x.

(6) Flammability: A flammability test was conducted according to UL standard 94V.

(7) Friction and wear resistance; outer diameter 25 mm, inner diameter 2
A 0 mm cylindrical test piece was molded, and a thrust friction wear test was conducted using a friction tester [Friktron friction wear tester manufactured by Orientec Co., Ltd.]. Carbon steel for machine structural use (S-45C) was used as a mating material, and the coefficient of dynamic friction was measured in an unlubricated state. The sliding speed was 20 cm / sec.

[Examples 1 to 5 and Comparative Examples 1 to 3] The components shown in Table 1 were mixed in a blending ratio shown in Table 1 with a V-type blender, and then a vent type twin-screw extruder having a diameter of 30 mm [(shares ) Pelletization was performed at a cylinder temperature of 240 ° C. with TEX30XSST manufactured by Japan Steel Works. After drying the pellets at 100 ° C. for 5 hours, an injection molding machine [T manufactured by FANUC Co., Ltd.
-150D], various test pieces were prepared at a cylinder temperature of 250 ° C. and a mold temperature of 60 ° C., and the evaluation results are shown in Table 1. In addition, the symbol which shows each component of Table 1 is as follows.

PC: Polycarbonate resin [L-1225 manufactured by Teijin Chemicals, viscosity average molecular weight 22,500] PTFE: Polytetrafluoroethylene resin [LUBRON L-5 manufactured by Daikin Industries, Ltd., average particle size about 7 μm] PE-1; Polyethylene resin [Mitsui Petrochemical Co., Ltd. Hiwax 310MP, viscosity average molecular weight 3,000] PE-2; Polyethylene resin [Mitsui Petrochemical Co., Ltd. HiZex 2100JP, viscosity average molecular weight 60,000] ABS; Heat Plastic graft copolymer [ABS resin Santac UT-61 manufactured by Mitsui Toatsu Chemicals, Inc.] talc; flaky inorganic filler [talc P-3 manufactured by Nippon Talc Co., Ltd., average particle size about 2.8 μm] Glass fiber Chopped glass fiber [Nitobo Co., Ltd. 3
PE-941, diameter 13 μm, cut length 3 mm] Elastic body-1; Elastic polymer (MBS) [Paraloid EXL-2602 manufactured by Kureha Chemical Industry Co., Ltd.] Elastic body-2; Composite rubber graft copolymer [Mitsubishi Rayon Metabrene S-2001] Flame Retardant-1; Halogen flame retardant (carbonate oligomer of tetrabromobisphenol A) [Teijin Kasei Co., Ltd.]
FG-7000] Flame Retardant-2; Phosphorus Flame Retardant (Triphenyl Phosphate) [TPP manufactured by Daihachi Chemical Co., Ltd.] Anti-dripping agent: Polytetrafluoroethylene having fibril forming ability [manufactured by Daikin Industries, Ltd. Polyflon F-2
01L]

[0032]

[Table 1]

[0033]

As is apparent from the table, the resin composition of the present invention is excellent in impact resistance, abrasion resistance and abrasion resistance and rigidity, and is excellent in moldability of a thin portion, and is obtained from this resin composition. The molded products obtained are excellent in appearance and slidability, and are most suitable as sliding parts for OA equipment and home electric appliances, which tend to be light, thin, short, and small, and their industrial effects are exceptional.

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Claims (3)

[Claims] 1. A polycarbonate resin (a component), (B) a polytetrafluoroethylene resin (b component), and (C) a viscosity average molecular weight of 1,000 to 10,000.
No. 0 polyethylene resin (component c), (D) a thermoplastic graft copolymer (d component) obtained by grafting a vinyl cyanide compound and an aromatic vinyl compound on a diene rubber component,
(E) Scale-like inorganic filler (e component), (F) Two kinds selected from the group consisting of methacrylic acid ester, acrylic acid ester and aromatic vinyl compound in the presence of rubber containing repeating units derived from butadiene An elastic copolymer obtained by copolymerizing the above monomers and / or a composite rubber having a structure in which a polyorganosiloxane rubber component and a polyalkyl (meth) acrylate rubber component are intertwined with each other so that they cannot be separated from each other. Composite rubber-based graft copolymer (f containing one or more vinyl monomers graft-polymerized)
Component) and (G) flame retardant (g component), and when the total of the four components a to d is 100% by weight, the a component is 45
˜95.5% by weight, b component is 1 to 30% by weight, c component is 0.5 to 7% by weight, and d component is 3 to 53.5% by weight, and the total of four components a to d is 100% by weight. A sliding resin composition in which the e component is 3 to 50 parts by weight, the f component is 1 to 20 parts by weight, and the g component is 0 to 30 parts by weight with respect to parts. 2. The compounding amount of the g component is 1 to 30 parts by weight based on 100 parts by weight of the total of the four components a to d.
The slidable resin composition described. 3. A molded product obtained by melt-molding the slidable resin composition according to claim 1 or 2.