JP2002265772A - Slidable resin composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an aromatic polycarbonate resin composition which is suitable as a molding material for electronic machine parts, automobile parts, and the like, and can give a molded article excellent in sliding characteristics and having good surface appearances. SOLUTION: This slidable resin composition comprises 5-90 pts.wt. of an aromatic polycarbonate resin (A), 60-10 pts.wt. of a graft copolymer (B) obtained by emulsion polymerizing, in the presence of 40-80 wt.% (in terms of solids content) of an ethylene/propylene/non-conjugated diene-containing crosslinked latex containing 0.1-20 pts.wt., based on 100 pts.wt. of an ethylene/propylene/non- conjugated diene copolymer, of an acid-modified low-molecular weight α-olefin copolymer, 60-20 wt.% of a monomer component graft-polymerizable with the ethylene/propylene/non-conjugated diene copolymer, and 50-0 pt.wt. of a hard copolymer (C) comprising 60-76 wt.% of an aromatic vinyl monomer, 40-24 wt.% of a vinyl cyanide monomer and 0-30 wt.% of monomers copolymerizable with these monomers, provided that the total of the components A, B and C is 100 pts.wt.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slidable resin composition, and more particularly to a molded article having excellent sliding properties and good appearance, which is suitable as a molding material for electronic equipment parts and automobile parts. The present invention relates to an aromatic polycarbonate resin composition which can be used.

[0002]

2. Description of the Related Art A resin composition containing an aromatic polycarbonate resin is widely used as a molding material for various parts because of its excellent mechanical properties, heat resistance and impact resistance. In particular, an aromatic polycarbonate-based resin composition having improved sliding properties by mixing a sliding aid such as silicone oil, polyolefin resin, or polyorganosiloxane is used in a wider field. However, in a conventional resin composition in which a sliding aid is blended with an aromatic polycarbonate resin, a sufficient sliding property cannot be obtained by adding a small amount of the sliding aid, for example, squealing caused by contact between parts. There is no effect in preventing noise, and when added in a large amount, flow marks and silver during molding, as well as delamination phenomena occur, resulting in a disadvantage that the appearance of the molded product is poor. For this reason, conventionally, a slidable aromatic polycarbonate resin composition containing a slidability auxiliary material is mainly used for applications in which the surface appearance of a molded product is not particularly noticed, for example, for internal parts such as gears. I was

However, in recent applications of electronic devices such as MD players, in addition to technical characteristics such as slidability, a good appearance as a molded product is required. In addition, when applied to parts which are directly visible to the user, such as toys such as mobile phones and robot pets, and automobile interior parts such as switches and trims, in addition to high slidability, good appearance of molded products is desired. In particular, in the case of products that require light weight, such as mobile phones, slidability and good appearance of thin molded products are desired.

[0004] Under these circumstances, there is a need for the development of an aromatic polycarbonate resin composition having excellent sliding properties and self-lubricating properties, and also having good surface appearance of a molded article.

JP-A-10-306206 discloses that an aromatic polycarbonate resin is blended with a thermoplastic resin such as an aromatic vinyl compound and a vinyl cyanide compound, a reinforcing filler, a slidability imparting material and a polyester elastomer. Although a resin composition having improved surface appearance and slidability of a molded article has been proposed, no satisfactory effect has been obtained.

[0006]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above-mentioned conventional circumstances, and is an aromatic polycarbonate resin composition having high mechanical properties, which is extremely slidable. An object of the present invention is to provide a slidable resin composition capable of obtaining a molded article which is excellent and has excellent surface appearance.

[0007]

The slidable resin composition of the present invention comprises (A) 5 to 90 parts by weight of an aromatic polycarbonate resin and (B) 100 parts by weight of an ethylene / propylene / non-conjugated diene copolymer. Ethylene-containing acid-modified low molecular weight α-olefin copolymer containing 0.1 to 20 parts by weight
Propylene / non-conjugated diene-containing crosslinked latex 40-8
In the presence of 0% by weight (as solid content), a graft copolymer 60 to 60% by weight obtained by emulsion polymerization of 60 to 20% by weight of a monomer component capable of being graft-polymerized with the ethylene / propylene / non-conjugated diene copolymer. 10 parts by weight, (C) 60 to 76% by weight of an aromatic vinyl monomer, vinyl cyanide monomer 4
50 to 0 parts by weight of a hard copolymer containing 0 to 24% by weight and 0 to 30% by weight of a monomer copolymerizable with these monomers (provided that (A), (B) and (C) 100)
Parts by weight).

That is, the slidable resin composition of the present invention comprises:
(A) 5 to 90 parts by weight of an aromatic polycarbonate resin,
(B) Ethylene / propylene / non-conjugated diene copolymer 1
In the presence of 40 to 80% by weight (as a solid content) of an ethylene / propylene / non-conjugated diene-containing crosslinked latex containing 0.1 to 20 parts by weight of an acid-modified low molecular weight α-olefin copolymer with respect to 00 parts by weight. 60 to 10 parts by weight of a graft copolymer obtained by emulsion polymerization of 60 to 20% by weight of a monomer component capable of graft polymerization with the ethylene / propylene / non-conjugated diene copolymer (provided that (A) and (B)
Of 100 parts by weight).
(A) A part of the aromatic polycarbonate resin is replaced by (C) a hard copolymer, (A) 5 to 90 parts by weight of an aromatic polycarbonate resin, and (B) an ethylene / propylene / non-conjugated diene copolymer 100 In the presence of 40 to 80% by weight (as solid content) of an ethylene / propylene / non-conjugated diene-containing crosslinked latex containing 0.1 to 20 parts by weight of an acid-modified low molecular weight α-olefin copolymer with respect to parts by weight. 60 to 10 parts by weight of a graft copolymer obtained by emulsion polymerization of 60 to 20% by weight of a monomer component capable of graft polymerization with the ethylene / propylene / non-conjugated diene copolymer, and (C) a hard copolymer 50 parts by weight or less (however,
(A total of 100 parts by weight of (A), (B) and (C)).

The (C) hard copolymer is composed of 60 to 76% by weight of an aromatic vinyl monomer and a vinyl cyanide monomer 4%.
0 to 24% by weight, and further contains a monomer copolymerizable with these monomers, and contains an aromatic vinyl monomer 6
It may contain 0 to 76% by weight, 40 to 24% by weight of a vinyl cyanide monomer, and 30% by weight or less of a monomer copolymerizable with these monomers.

According to the present invention, (A) an aromatic polycarbonate resin, (B) an ethylene / propylene / non-conjugated diene graft copolymer and, if necessary, (C) a hard copolymer are blended, whereby An excellent slidability can be obtained without using a mobility aid, and a slidable resin composition having high strength and rigidity and capable of providing a good molded product appearance can be obtained.

That is, as described above, in the conventional aromatic polycarbonate resin composition, the sliding property is improved by blending a sliding property auxiliary material such as silicone oil, polyolefin resin and polyorganosiloxane. However, these slidability aids have a problem that a small amount of the compound does not provide a sufficient effect of improving the slidability, and a large amount of the compound results in poor molding resulting in poor appearance of the molded product.

In the present invention, without using an auxiliary material for slidability, (B) an ethylene / propylene / non-conjugated diene graft copolymer is blended to improve the slidability of the aromatic polycarbonate resin. While maintaining the surface appearance of the product at a high level, extremely good sliding characteristics can be obtained.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the slidable resin composition of the present invention will be described in detail.

The aromatic polycarbonate resin (A) used in the present invention includes, for example, bis (4-hydroxyphenyl) methane, bis (4-hydroxyphenyl) ethane,
2,2-bis (4-hydroxyphenyl) propane,
2,2-bis (4-hydroxy-3,5-dibromophenyl) propane, 2,2-bis (4-hydroxy-3,
5-dimethylphenyl) propane, 2,2-bis (4-
Obtained from bis (hydroxyaryl) alkanes such as hydroxy-3,5-dichlorophenyl) propane and bis (4-hydroxyphenyl) phenylmethane and carbonates such as phosgene (phosgene method) or diaryl carbonate (ester exchange method). Bis (hydroxyaryl) alkane-based polycarbonate resins and the like can be mentioned, and these may be used alone or in combination of two or more.

The physical properties of the aromatic polycarbonate resin used are not particularly limited, but those having a viscosity average molecular weight (solution viscosity method) of 18,000 to 26,000 are preferred. That is, if the viscosity average molecular weight is less than 18,000, the fluidity is good, but the chemical resistance tends to be poor,
If it exceeds 000, the fluidity (moldability) will deteriorate.

The (B) ethylene / propylene / non-conjugated diene graft copolymer used in the present invention is based on 100 parts by weight of the ethylene / propylene / non-conjugated diene copolymer.
The ethylene / propylene / non-conjugated diene copolymer containing 0.1 to 20 parts by weight of the acid-modified low molecular weight α-olefin copolymer is added to the ethylene / propylene / 60 to 20% by weight of a monomer component capable of being graft-polymerized with a non-conjugated diene copolymer
Is obtained by emulsion graft polymerization of

The ethylene / propylene / non-conjugated diene copolymer (hereinafter abbreviated as “EPDM”) is made of ethylene,
It is a rubbery polymer of propylene and a non-conjugated diene,
The proportion of ethylene contained in EPDM is 80-90.
Preferably it is mol%. That is, if this proportion is less than 80 mol%, the desired slidability cannot be obtained due to lack of compatibility with the acid-modified low-molecular-weight α-olefin copolymer described below, and if it exceeds 90 mol%, In some cases, the impact resistance may be reduced. The non-conjugated diene component includes 1,4
-Hexadiene, 5-ethylidene-2-norbornene,
5-vinylnorbornene, dicyclopentadiene and the like are preferable, and the content ratio is preferably 0.1 to 2.0 mol%.

Examples of the acid-modified low-molecular-weight α-olefin copolymer include an acid-modified polyethylene containing 99.8 to 80% by weight of an α-olefin and 0.2 to 20% by weight of an unsaturated carboxylic acid compound. Here, as the α-olefin, ethylene or the like is used, and as the unsaturated carboxylic acid, acrylic acid, maleic acid, itaconic acid, maleic anhydride,
Examples include itaconic anhydride and maleic acid monoamide.

When the proportion of the acid-modified low molecular weight α-olefin copolymer in the crosslinked latex containing EPDM is EPDM100
When the amount is less than 0.1 part by weight with respect to part by weight, there is no effect of improving the slidability of the finally obtained resin composition.
PDM-containing crosslinked latex lacks stability, and if it exceeds 20 parts by weight, the impact strength is significantly reduced.
The content ratio of the acid-modified low molecular weight α-olefin copolymer in the DM-containing crosslinked latex is 0.1 to 20 parts by weight, preferably 1 to 15 parts by weight based on 100 parts by weight of EPDM.

The EPDM-containing crosslinked latex preferably has a gel content of 40 to 95% by weight and an average particle size of 0.2 to 1 μm in view of the balance of physical properties. That is, when the gel content of the EPDM-containing crosslinked latex is less than 40% by weight, the impact resistance and surface appearance of the finally obtained resin composition deteriorate, and when the gel content is more than 95% by weight, The impact resistance of the obtained resin composition may be significantly deteriorated. When the average particle size of the EPDM-containing crosslinked latex is less than 0.2 μm, the impact resistance of the obtained resin composition is significantly deteriorated, and when it exceeds 1 μm, the gloss is reduced and the surface appearance of the molded product is deteriorated. There are cases.

(B) If the EPDM-containing crosslinked latex of the graft copolymer is less than 40% by weight and the monomer component exceeds 60% by weight, the slidability of the finally obtained resin composition cannot be improved, Further, the crosslinked latex containing EPDM is 80%.
When the content exceeds 100% by weight and the content of the monomer component is less than 20% by weight, the surface appearance of the molded article deteriorates. For this reason, the EPDM-containing crosslinked latex of the graft copolymer (B) used in the present invention is 40 to 80% by weight and the monomer component is 60 to 20% by weight.

The monomer components capable of being graft-polymerized to EPDM include aromatic vinyl monomers, vinyl cyanide monomers, (meth) acrylate compound monomers, maleimide compound monomers, glutar Examples thereof include an imide compound monomer and an unsaturated carboxylic acid compound monomer, and these may be used alone or in combination of two or more.

Examples of the aromatic vinyl monomer include styrene, α-methylstyrene, paramethylstyrene, vinyltoluene, о-ethylstyrene, о, p-dichlorostyrene and the like. From the viewpoint of physical properties, styrene and α-methylstyrene are preferred.

The vinyl cyanide monomers include:
Acrylonitrile, methacrylonitrile and the like, and as the (meth) acrylate compound monomer, methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate, amyl acrylate, hexyl acrylate, octyl acrylate,
Acrylic esters such as 2-ethylhexyl acrylate, cyclohexyl acrylate, dodecyl acrylate, octadecyl acrylate, phenyl acrylate, benzyl acrylate, methyl methacrylate, ethyl methacrylate, propyl methacrylate, butyl methacrylate, amyl methacrylate, hexyl methacrylate, octyl methacrylate, 2-ethylhexyl methacrylate , Cyclohexyl methacrylate,
Examples include methacrylates such as dodecyl methacrylate, octadecyl methacrylate, phenyl methacrylate, and benzyl methacrylate. Maleimide compound monomers include maleimide, N-phenylmaleimide, N-cyclohexylmaleimide, N-methylmaleimide, and N-butylmaleimide. And imide compounds of α- or β-unsaturated dicarboxylic acids such as N- (p-methylphenyl) maleimide. Glutarimide compound monomers include glutarimide and N-phenylglutarimide. Examples of the unsaturated carboxylic acid monomer include unsaturated carboxylic acid amides such as acrylic acid, methacrylic acid, itaconic acid fumaric acid, acrylamide and methacrylamide.

In the present invention, the monomer components capable of being graft-polymerized with EPDM are, in particular, 60 to 76% by weight of an aromatic vinyl monomer and 40 to 2% of a vinyl cyanide monomer.
A monomer mixture containing 4% by weight is suitable in terms of improving slidability.

The hard copolymer (C) used in the present invention comprises 60 to 76% by weight of an aromatic vinyl monomer, 40 to 24% by weight of a vinyl cyanide monomer, and copolymers with these monomers. It contains 0 to 30% by weight of a polymerizable monomer. As preferred specific examples of the aromatic vinyl monomer and the vinyl cyanide monomer, those described above can be used. The monomers copolymerizable with these monomers include the above-mentioned (meth) acrylate compound monomers, maleimide compound monomers, glutarimide compound monomers, and unsaturated carboxylic acid compound monomers. And the like.

The slidable resin composition of the present invention comprises (A) 5 to 90 parts by weight of the aromatic polycarbonate resin described above,
(B) 60 to 10 parts by weight of an EPDM graft copolymer,
(C) 50 to 0 parts by weight of the hard copolymer are (A), (B),
And (C) so that the total amount is 100 parts by weight.

(B) EPDM-based graft copolymer is 10
If the amount is less than 90 parts by weight and the total of (A) the aromatic polycarbonate resin or (A) the aromatic polycarbonate resin and (C) the hard copolymer exceeds 90 parts by weight, the desired sliding property is obtained. I can't. (B) When the EPDM graft copolymer exceeds 60 parts by weight and the total of (A) the aromatic polycarbonate resin or (A) the aromatic polycarbonate resin and (C) the hard copolymer is less than 40 parts by weight. In this case, the surface gloss and the surface appearance deteriorate, and in either case, it is not preferable. Particularly preferred formulations in the present invention are (A) 10 to 80 parts by weight of an aromatic polycarbonate resin, (B) EP
The DM graft copolymer is 40 to 20 parts by weight, and the (C) hard copolymer is 0 to 50 parts by weight.

(A) an aromatic polycarbonate resin,
The mixing of the (B) EPDM graft copolymer and (C) the hard copolymer can be performed by a Banbury mixer, a kneader or a melt kneader of a single or twin screw extruder, whereby a uniform composition can be obtained. Obtainable.

The slidable resin composition of the present invention comprises:
In addition to (A) an aromatic polycarbonate resin, (B) an EPDM graft copolymer, and (C) a hard copolymer, if necessary, an antioxidant, a heat stabilizer, a light stabilizer, a lubricant, a plasticizer, a flame retardant , An antistatic agent, an inorganic or organic colorant, and the like.

[0031]

EXAMPLES The present invention will be described more specifically with reference to Production Examples, Examples and Comparative Examples below, but the present invention is not limited to the following Examples unless it exceeds the gist. In the following, “parts” indicates parts by weight.

[Production of EPDM-Containing Crosslinked Latex] Production Example 1 Production of EPDM-Containing Crosslinked Latex (a) EPDM (EPT3012P, manufactured by Mitsui Chemicals, Inc., having an ethylene content of 82 mol% and 5-ethylidene-
Contains 1 mol% of 2-norbornene. After 100 parts were dissolved in 566 parts of n-hexane, 10 parts of acid-modified polyethylene (High Wax 2203A) manufactured by Mitsui Chemicals, Inc. was added, and 4.5 parts of oleic acid was further added to completely dissolve. Separately K to 700 parts of water
Ethylene glycol 0.5
Then, the mixture was maintained at 60 ° C., and the above-prepared polymer solution was gradually added thereto to emulsify, followed by stirring with a homomixer. Next, a part of the solvent and water are distilled off to obtain a particle size of 0.4 to 0.6 μm.
m of latex was obtained. To this latex, 1.5 parts of divinylbenzene and 1.0 part of di-t-butylperoxytrimethylcyclohexane were added to 100 parts of EPDM as a rubber component, and reacted at 120 ° C. for 1 hour to obtain an EPDM-containing crosslinked latex (a). .

Production Example 2 Production of EPDM-Containing Crosslinked Latex (b) In Production Example 1, except that 1.0 part of di-t-butylperoxytrimethylcyclohexane was changed to 2.0 parts.
The crosslinked latex (b) containing EPDM was produced in the same manner as in Production Example 1.

Production Example 3 Production of EPDM-Containing Crosslinked Latex (c) In Preparation Example 1, except that 1.0 part of di-tert-butylperoxytrimethylcyclohexane was changed to 3.0 parts.
It was produced in the same manner as in Production Example 1 to obtain an EPDM-containing crosslinked latex (c).

Production Example 4 Production of Crosslinked Latex (d) Containing EPDM In Production Example 1, the acid-modified polyethylene (high wax)
Except not adding 2203A), it manufactured by the method similar to manufacture example 1, and obtained EPDM containing crosslinked latex (d).

Production Example 5 Production of EPDM-Containing Crosslinked Latex (e) In Production Example 1, the acid-modified polyethylene (high wax)
2203A) A crosslinked latex containing EPDM (e) was obtained in the same manner as in Production Example 1 except that 10 parts was changed to 25 parts.

Each of the EPDM-containing crosslinked latexes (a) to (e) obtained above was coagulated with dilute sulfuric acid, washed with water and dried, and 1 g of each was collected and immersed in 200 ml of toluene for 40 hours. Each gel content was determined by filtering through a stainless steel mesh wire mesh and drying the residue.

The average particle size of the latex was determined by a particle size distribution analyzer (CAPA-500, manufactured by Horiba).

EPDM-containing crosslinked latex (a)
Table 1 below shows the content of the acid-modified polyethylene, the content of the gel, and the particle size of (e).

[0040]

[Table 1]

[Production of Graft Copolymer] Production Example 6 Production of Graft Copolymer (B-1) 70 parts of EPDM-containing crosslinked latex (a), 170 parts of water, 0.01 parts of sodium hydroxide were placed in a stainless steel polymerization tank equipped with a stirrer.
Parts, sodium pyrophosphate 0.45 part, ferrous sulfate 0.01 part,
0.57 parts of dextrose was charged, and the polymerization temperature was kept constant at 80 ° C., acrylonitrile 9 parts, styrene 21 parts, CHP
(Cumene hydroperoxide) 1.0 part for 150 minutes, simultaneously 0.45 parts of sodium pyrophosphate, 0.01 parts of ferrous sulfate, 0.56 parts of dextrose, 1.0 part of sodium oleate, 3 parts of water
Polymerization was carried out while continuously adding 0 parts for 180 minutes to obtain a graft polymer latex. The monomer conversion and the coagulated amount of the obtained latex were 93% and 0.2%, respectively.
5%. Thereafter, an antioxidant was added to the latex, a coagulation treatment was performed with sulfuric acid, and a step of washing, dehydration and drying was performed to obtain a powder of the graft copolymer (B-1).

Production Example 7 Production of Graft Copolymer (B-2) In Production Example 6, the crosslinked latex containing EPDM (a)
A graft copolymer latex was produced in the same manner as in Production Example 6, except that the EPDM-containing crosslinked latex (b) was used instead of the above, to obtain a powder of the graft copolymer (B-2). The monomer conversion rate and the coagulated product precipitation amount of this graft polymer latex were 90% and 0.22%, respectively.

Production Example 8 Production of Graft Copolymer (B-3) In Production Example 6, the crosslinked latex containing EPDM (a)
A graft copolymer latex was produced in the same manner as in Production Example 6 except that the EPDM-containing crosslinked latex (c) was used instead of the above, to obtain a powder of the graft copolymer (B-3). The monomer conversion rate and the coagulated product precipitation amount of the graft polymer latex were 92% and 0.31%, respectively.

Production Example 9 Production of Graft Copolymer (B-4) In Production Example 6, the crosslinked latex containing EPDM (a)
A graft copolymer latex was produced in the same manner as in Production Example 6 except that the EPDM-containing crosslinked latex (d) was used instead of the above, to obtain a powder of the graft copolymer (B-4). The monomer conversion rate and the coagulated product precipitation amount of this graft polymer latex were 92% and 0.52%, respectively.

Production Example 10 Graft copolymer (B-5)
In Production Example 6, the EPDM-containing crosslinked latex (a)
A graft polymer latex was produced in the same manner as in Production Example 6 except that the EPDM-containing crosslinked latex (e) was used instead of the above, to obtain a powder of the graft copolymer (B-5). The monomer conversion rate and the coagulated amount of the graft polymer latex were 93% and 0.24%, respectively.

[Production of Hard Copolymer] Production Example 11 Production of Hard Copolymer (C-1) After sufficiently replacing the inside of an autoclave equipped with a stirrer with nitrogen, 120 parts of distilled water and 0.003 part of sodium alkylbenzenesulfonate were prepared. , Acrylonitrile 30 parts, styrene 70 parts,
Benzoyl peroxide 0.7 part, t-butyl peroxybenzoate 0.07 part, calcium phosphate 0.6 part, t-
0.18 parts of dodecyl mercaptan was charged, the internal temperature was raised to 80 ° C. while stirring at a rate of 350 rpm, and polymerization was carried out at this temperature for 9 hours. Then, the internal temperature was raised to 120 ° C. over 2.5 hours, and the reaction was carried out at this temperature for 2 hours. The obtained slurry was washed and dried to obtain a hard copolymer (C-1). The monomer conversion of the obtained hard polymer was 98%.

Production Example 12 Production of Hard Copolymer (C-2) After sufficiently replacing the inside of an autoclave equipped with a stirrer with nitrogen, 120 parts of distilled water, 0.003 part of sodium alkylbenzenesulfonate, 27 parts of acrylonitrile, 23 parts of styrene ,
α-Methylstyrene 37 parts, N-phenylmaleimide 13
Parts, benzoyl peroxide 0.7 parts, t-butyl peroxybenzoate 0.07 parts, calcium phosphate 0.6 parts,
0.18 parts of t-dodecyl mercaptan was charged, the internal temperature was raised to 80 ° C. while stirring at a rate of 350 rpm, and polymerization was carried out at this temperature for 9 hours. Then, the internal temperature was raised to 120 ° C. over 2.5 hours, and the reaction was carried out at this temperature for 2 hours. The obtained slurry was washed and dried to obtain a hard copolymer (C-2). The monomer conversion of the obtained hard polymer was 97%.

Examples 1 to 10 and Comparative Examples 1 to 10 The ratio of the aromatic polycarbonate resin shown in Tables 2 and 3, the graft copolymer and the hard copolymer obtained in the above production example, and polyoxyethylene 0.3 parts of polyoxypropylene glycol and 0.5 parts of 2- (2-hydroxy 5-t-octylphenyl) benzotriazole were added, and the mixture was uniformly kneaded with a Banbury mixer, and then pelletized with a pelletizer. After the obtained pellets were dried at 120 ° C. for 5 hours by a hot air circulating drier, they were molded by an injection molding machine at a cylinder temperature of 280 ° C. and a mold temperature of 80 ° C. to obtain test pieces for each test.

As the aromatic polycarbonate resin, Iupilon S-3000 (viscosity average molecular weight: 22000) and E-2000 manufactured by Mitsubishi Engineering-Plastics Corporation are used.
(Viscosity average molecular weight: 30,000) was used. Tables 2 and 3 show S
-3000 is shown as PC-1, and E-2000 is shown as PC-2.

The properties of the obtained molded article were tested under the following conditions and methods, and the results are shown in Tables 2 and 3.

[Slidability (Coefficient of Dynamic Friction)] JIS-K7
It was measured according to the 218 A method (ring-on-ring method). Testing machine: Orientec Co., Ltd. EFM-iii EM
Type friction tester Test piece: Hollow cylindrical test piece (inner diameter 20 mm, outer diameter 25.6 mm) A test piece was mounted on the upper and lower sides, rubbed under each load, and the dynamic friction coefficient was measured. Load: 1.5kg, 2.0kg, 2.5kg, 3.0kg, 3.5kg, 4.0k
g, 4.5 kg [Glossy (%)] According to JIS Z8741 (reflectance at an incident angle of 60 °). Surface appearance: visually evaluated according to the following criteria. ：: No unevenness of flow mark and pearly luster. Δ: The flow mark and pearl-like glossiness are slightly uneven, but can be used. X: The flow mark and pearl-like glossiness are recognized. [Fluidity (g / 10 min)] ASTM D-123
According to 8. 220 ° C, 10 kg [Izod impact value (J / m)] ASTM D-25
According to 6. 1/4 inch thickness, notch [Heat deformation temperature (° C.)] According to ASTM D-648. 1/4 inch thick

[0052]

[Table 2]

[0053]

[Table 3]

From Tables 2 and 3, it can be seen that the slidable resin composition of the present invention has a good balance of sliding characteristics, surface gloss, surface appearance, fluidity and impact resistance, and has extremely excellent characteristics. it is obvious.

[0055]

As described in detail above, the slidable resin composition of the present invention exhibits excellent properties in mechanical properties such as impact strength, moldability such as fluidity, and surface appearance of a molded article. In addition, it has extremely good sliding properties and is extremely suitable as a molding material for electronic equipment parts and automobile parts.

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Tsutomu Yoshitomi 525-14 Oki Obe, Uji, Ube City, Yamaguchi Prefecture F-term in Ube Plant Ube Plant (reference) 4J002 BC06Y BN06X CG00W 4J026 AA11 AA12 AA13 AC02 AC17 AC18 AC32 BA05 BA06 BA08 BA25 BA27 BA31 BA32 DA04 DB04 DB16 GA09

Claims (1)

[Claims] (A) aromatic polycarbonate resin
90 parts by weight, and (B) an ethylene / propylene / non-conjugated diene copolymer 1
In the presence of 40 to 80% by weight (as a solid content) of an ethylene / propylene / non-conjugated diene-containing crosslinked latex containing 0.1 to 20 parts by weight of an acid-modified low molecular weight α-olefin copolymer with respect to 00 parts by weight. (C) aromatic vinyl; 60 to 10 parts by weight of a graft copolymer obtained by emulsion polymerization of 60 to 20% by weight of a monomer component capable of being graft-polymerized with the ethylene / propylene / non-conjugated diene copolymer; Hard copolymer containing 60 to 76% by weight of a monomer, 40 to 24% by weight of a vinyl cyanide monomer, and 0 to 30% by weight of a monomer copolymerizable with these monomers. A slidable resin composition containing 0 parts by weight (100 parts by weight in total of (A), (B) and (C)).