JP2001064478A - Thermoplastic resin composition and molded article thereof - Google Patents

Abstract

(57) [Problem] To provide a thermoplastic resin composition having excellent sliding characteristics while maintaining mechanical properties and the like, and a resin molded product thereof. SOLUTION: (1) 50 to 99% by weight of a thermoplastic resin selected from the group consisting of polyoxymethylene, polyamide, aromatic polyester and polyphenylene sulfide;
And (2) 5 to 95% by weight of an ethylene (co) polymer segment having a weight average molecular weight of 1,000 to 1,000,000 synthesized with a metallocene catalyst and a vinyl monomer. Weight average molecular weight of 1,000
A graft copolymer comprising 5 to 95% by weight of a vinyl (co) polymer segment having a particle size of 0.1 to 1,000,000.
A thermoplastic resin composition containing 1 to 50% by weight of a multiphase structure type graft copolymer dispersed at 001 to 10 μm,
A resin molded product obtained by molding it into a predetermined shape.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermoplastic resin composition having excellent sliding properties while maintaining mechanical properties and thermal properties, and a resin molded product thereof.

[0002]

2. Description of the Related Art Polyoxymethylene, polyamide, aromatic polyester and polyphenylene sulfide are excellent in mechanical properties, electrical properties, moldability, dimensional accuracy of molded articles, etc., and are also excellent in sliding properties, so that bearings are used. Widely used for sliding members such as gears and gears. In recent years, with the expansion of fields of use, higher performance has been required for slidability, and various improvements have been made.

For example, Japanese Patent Application Laid-Open No. Sho 62-253650 discloses a thermoplastic resin composition in which a polyethylene having a specific melt index is added to reduce the friction coefficient and eliminate the squeal phenomenon during sliding. It has been disclosed. JP-A-63-33465 discloses a thermoplastic resin composition excellent in moldability, friction resistance and abrasion resistance by uniformly dispersing ultra-high molecular weight polyethylene fine powder. . Also, JP-A-2-138
No. 357 discloses polyethylene and acrylonitrile.
A thermoplastic resin composition which is excellent in moldability, friction resistance and abrasion resistance by dispersing a graft copolymer comprising a styrene copolymer is disclosed.

[0004]

However, in the method disclosed in Japanese Patent Application Laid-Open No. Sho 62-253650, the compatibility between polyethylene and polyoxymethylene is poor.
There are drawbacks in that the mechanical strength and heat resistance are greatly reduced, the obtained molded product undergoes a delamination phenomenon, and a transfer phenomenon to a mold occurs.

In the method disclosed in JP-A-63-33465, the dispersed ultra-high-molecular-weight polyethylene fine particles still have a sufficiently small particle diameter, and therefore have a sufficient effect on lowering the friction coefficient. There was a drawback that it was not possible. Further, according to the method disclosed in JP-A-2-138357, since the graft copolymer is synthesized using ordinary low-density polyethylene as a raw material, the amount of gel components generated increases, and the mechanical properties of the molded article are reduced. There was a drawback of lowering.

An object of the present invention is to provide a thermoplastic resin composition having excellent sliding characteristics while maintaining mechanical properties and thermal properties, and a resin molded product thereof.

[0007]

According to a first aspect of the present invention, there is provided a thermoplastic resin selected from the group consisting of (1) polyoxymethylene, polyamide, aromatic polyester and polyphenylene sulfide. And (2) 5 to 95% by weight of an ethylene (co) polymer segment having a weight average molecular weight of 1,000 to 1,000,000 synthesized by the metallocene catalyst;
The weight-average molecular weight formed from a vinyl monomer is 1,0
A graft copolymer comprising 5 to 95% by weight of a vinyl (co) polymer segment having a particle size of 0.001 to 10,000,000 and a particle size of 0.001 to 10 μm dispersed in the other segment. Is a thermoplastic resin composition containing 1 to 50% by weight of the resulting multiphase structure type graft copolymer.

[0008] The second invention is the thermoplastic resin composition of the first invention further comprising a lubricant.

The third invention is a resin molded product obtained by molding the thermoplastic resin composition of the first invention or the second invention into a predetermined shape.

[0010]

Next, each component of the present invention will be described. The polyoxymethylene used in the present invention includes all known polyoxymethylenes,
For example, it is obtained by polyaddition of formaldehyde or ring-opening polymerization of trioxane or tetraoxane, which is a cyclic trimer of formaldehyde. For the purpose of improving heat resistance, for example, polyoxymethylene having acetylated terminal with acetic anhydride or copolymerized with cyclic ether or the like to prevent thermal decomposition from the polymer terminal can be used.

The polyoxymethylene used in the present invention preferably has a weight average molecular weight of 10,000 to 150,000, more preferably 15,000 to 70,000. If the weight average molecular weight is less than 10,000, sufficient mechanical properties cannot be obtained.
Exceeding the above results in poor moldability, and both are not preferred.

The polyamide used in the present invention includes, for example, nylon 6, nylon 6.6, nylon 6,10,
Aliphatic polyamide resins such as nylon 6,12, nylon 11, nylon 12, nylon 4.6, etc .; aromatic polyamide resins such as polyhexamethylene diamine terephthalamide, polyhexamethylene diamine isophthalamide, xylene group-containing polyamide And their modified products or mixtures thereof. Particularly preferred polyamide resins are nylon 6, nylon 6.6, and the like.

The aromatic polyester used in the present invention is:
A polyester having an aromatic ring in the chain unit of the polymer, which is composed of aromatic dicarboxylic acid (or its ester-forming derivative) and diol (or its ester-forming derivative)
And a polymer or copolymer obtained by a condensation reaction containing as a main component.

The aromatic dicarboxylic acid referred to herein includes:
For example, terephthalic acid, isophthalic acid, phthalic acid, 2,6
-Naphthalenedicarboxylic acid, 1,5-naphthalenedicarboxylic acid, bis (p-carboxyphenyl) methane, anthracenedicarboxylic acid, 4,4'-diphenylcarboxylic acid, 4,4'-diphenyletherdicarboxylic acid, 1,
2-bis (phenoxy) ethane-4,4'-dicarboxylic acid or their ester-forming derivatives.

The diol component is, for example, an aliphatic diol having 2 to 10 carbon atoms, ie, ethylene glycol.
Propylene glycol, 1,4-butanediol,
Neopentyl glycol, 1,5-pentaneddiol,
1,6-hexanediol, decamethylene diglycol
, Cyclohexanediol, molecular weight 400-6000
Polyethylene glycol, poly-1,3-propylene glycol, polytetramethylene glycol, and mixtures thereof.

Preferred aromatic polyesters used in the present invention include, for example, polyethylene terephthalate,
Polypropylene terephthalate, polybutylene terephthalate, polyhexamethylene terephthalate, polyethylene-2,6-naphthalate, polyethylene-1,2-
Bis (phenoxy) ethane-4,4'-dicarboxylate and the like can be mentioned. More preferred are polyethylene terephthalate and polybutylene terephthalate.

[0017] The polyphenylene sulfide used in the present invention has the following formula _{(1) - (C 6 H} 4 -S) n - represented by those in (1), and sodium sulfide generally p- dichlorobenzene Is reacted at 175 ° C. to 350 ° C. in a polar solvent such as N-methylpyrrolidone, but is not limited thereto.

Ratio of thermoplastic resin selected from the group consisting of polyoxymethylene, polyamide, aromatic polyester and polyphenylene sulfide (hereinafter abbreviated as thermoplastic resin for improving slidability) in the thermoplastic resin composition Is usually 50 to 99% by weight, preferably 60 to 95% by weight. If the amount is less than 50% by weight, the mechanical strength and the heat resistance are lowered, which is not preferable. If the amount is more than 99% by weight, that is, the proportion of the specific graft copolymer described below decreases, so that the object of the present invention is reduced. The effect of improving the sliding characteristics is small, which is not preferable.

The multiphase structure type graft copolymer used in the present invention includes an ethylene (co) polymer segment (hereinafter abbreviated as A segment) synthesized with a metallocene catalyst, and one or more kinds of vinyl. A graft copolymer comprising a vinyl-based (co) polymer segment (hereinafter abbreviated as B segment) formed from a series monomer.

The metallocene catalyst is formed from a transition metal compound belonging to Group IVB of the periodic table containing a ligand having a cyclopentadienyl skeleton, an organic aluminum oxy compound, a carrier, and if necessary, an organic aluminum compound. It is an olefin polymerization catalyst. Polyethylene synthesized with such a metallocene catalyst has higher strength and elastic modulus in spite of the same density and the same fluidity as low-density polyethylene synthesized by a normal high-pressure method. Similarly, when a graft copolymer is used, a graft copolymer having a polyethylene-based main chain synthesized with a metallothein catalyst has a higher strength and elastic modulus than a graft copolymer having a low-density polyethylene main chain. Is high. Therefore, when the graft copolymer having polyethylene as the main chain synthesized with a metallocene catalyst is added to the thermoplastic resin for improving the slidability, the sliding copolymer is compared with the case where the graft copolymer is added with low-density polyethylene as the main chain. The strength and elastic modulus of the thermoplastic resin for improving mobility are high. In addition, the thermoplastic resin for improving slidability is excellent in slidability (dynamic friction coefficient and specific wear amount).

The ethylene-based (co) polymer synthesized with a metallocene-based catalyst means that the constituent unit derived from ethylene is 50 to 100% by weight, preferably 70 to 100% by weight,
It is more preferably 80 to 100% by weight, and the structural unit derived from an α-olefin having 3 to 20 carbon atoms is 0 to 50% by weight, preferably 0 to 30% by weight, more preferably 0 to 20% by weight. % Is desirable.

The α-olefin having 3 to 20 carbon atoms includes, for example, propylene, 1-butene, 1-pentene, 1-hexene, 4-methyl-1-pentene,
-Octene, 1-decene, 1-dodecene, 1-tetradecene, 1-hexadecene, 1-octadecene, 1-eicosene and the like.

The weight average molecular weight of the A segment of the present invention is 1,000 to 1,000,000, preferably 5,000.
The range is from 0 to 600,000. Weight average molecular weight is 1,
If it is less than 000, the durability of the effect of improving the slidability is insufficient, so that it is not preferable. Or, when it exceeds 1,000,000, the molding processability is lowered, so that it is not preferable.

The B segment is formed from a vinyl monomer shown below. Specific examples of the vinyl monomer include (meth) acrylic esters such as hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, and 3-hydroxypropyl (meth) acrylate, acrylic acid, and methacryl. Acid, fumaric acid, maleic anhydride, itaconic acid,
Α, β-unsaturated carboxylic acids such as itaconic anhydride, bicyclo (2,2,1) -5-heptene-2,3-dicarboxylic acid and metal salts thereof, methyl acrylate, n-acrylate
Α, β-unsaturated carboxylic esters such as butyl, isobutyl acrylate, t-butyl acrylate, 2-ethylhexyl acrylate, methyl methacrylate, ethyl methacrylate, n-butyl methacrylate and isobutyl methacrylate, vinyl acetate, Vinyl esters such as vinyl propionate, vinyl caproate, vinyl caprylate, vinyl laurate, vinyl stearate, and vinyl trifluoroacetate; and unsaturated glycidyl group-containing monomers such as glycidyl acrylate, glycidyl methacrylate, and monoglycidyl itaconate. Dimer, aminoethyl (meth) acrylate, propylaminoethyl (meth) acrylate, dimethylaminoethyl methacrylate, alkyl (meth) acrylate derivatives such as aminopropyl (meth) acrylate, allylamine, Allylamine derivatives such as methacrylamine and N, N-dimethylacrylamide, vinyl aromatic monomers such as styrene; nuclear-substituted styrenes such as methylstyrene, dimethylstyrene, ethylstyrene, isopropylstyrene, chlorostyrene; α-substituted styrene; For example, monomers such as α-methylstyrene, α-ethylstyrene; (meth) acrylonitrile and the like can be mentioned. One or two or more of these vinyl monomers are used.

Among copolymers composed of these monomers, styrene (co) polymers are preferred because of their high compatibility with thermoplastic resins for improving slidability, especially polyoxymethylene or polyamide. Coalescence is preferred, and styrene-acrylonitrile copolymer is particularly preferred.

The B segment has a weight average molecular weight of 1,000 to 1,000,000, preferably 5,000.
It is in the range of 0 to 500,000. Weight average molecular weight is 1,
If it is less than 000, the compatibility becomes poor and the durability of the effect of improving the slidability is insufficient, so that it is not preferable. Or 1,
The case where the amount exceeds 1,000,000 is not preferable because of the same reason.

A occupying in the multiphase structure type graft copolymer
The proportion of the segment is 5 to 95% by weight, preferably 20%.
９０90% by weight. Therefore, the proportion of the B segment in the multiphase structure type graft copolymer is as follows:
It is 5 to 95% by weight, preferably 10 to 80% by weight.
When the proportion of the A segment is less than 5% by weight or the proportion of the B segment exceeds 95% by weight, the effect of improving the slidability is insufficient, which is not preferable. On the other hand, if the proportion of the A segment exceeds 95% by weight or the proportion of the B segment is less than 5% by weight, the compatibility is lowered, and the mechanical properties and the durability of the sliding performance are undesirably lowered.

Further, the multi-phase structure type graft copolymer referred to in the present invention is obtained by dispersing a B segment or A segment, which is a different segment, in a matrix of A segment or B segment in a spherical and uniform manner. Say. The particle size of the dispersed polymer is 0.001 to 10
μm, preferably 0.01 to 5 μm. When the dispersed particle diameter is less than 0.001 μm or more than 10 μm, the dispersibility is low, for example, the appearance is deteriorated or the mechanical properties are decreased, which is not preferable. The proportion of the multiphase structure type graft copolymer in the thermoplastic resin is usually 1 to 5
0% by weight, preferably 5 to 40% by weight.

The lubricant used in the present invention is usually added to improve the slidability of the resin, and includes, for example, spindle oil, refrigerating machine oil, turbine oil, machine oil, cylinder oil, gear oil. Mineral oils such as liquids; hydrocarbons such as liquid paraffin, paraffin wax, and polyethylene wax; fatty acids such as lauric acid, myristic acid, palmitic acid, and stearic acid; alcohols such as hexyl alcohol, octyl alcohol, cetyl alcohol, and stearyl alcohol; Dimethylpolysiloxane or the like can be used. The proportion of the lubricant in the thermoplastic resin is usually 20% by weight or less, preferably 0.1 to 15% by weight, more preferably 0.5 to 10% by weight.
% By weight.

The grafting method for producing the multi-phase structure type graft copolymer used in the present invention may be any of generally known methods such as a chain transfer method and an ionizing radiation irradiation method, but is most preferable. Is based on the following method. This is because the grafting efficiency is high and secondary aggregation due to heat does not occur, so that the expression of performance is more effective and the production method is simple.

Next, the method for producing the multi-phase structure type graft copolymer used in the present invention will be specifically described in detail. That is, 100 parts by weight of polyethylene synthesized with a metallocene catalyst is suspended in water. To 1 to 400 parts by weight of at least one vinyl monomer, one or a mixture of two or more radically polymerizable organic peroxides represented by the following formula (2) or (3) is added to the vinyl monomer. 0.1 to 20 parts by weight based on 100 parts by weight of the monomer and a polymerization initiator having a decomposition temperature of 40 to 90 ° C. for obtaining a half-life of 10 hours are mixed with a vinyl monomer and a radical polymerizable organic polymer. A mixed solution prepared by dissolving 0.01 to 5 parts by weight with respect to 100 parts by weight of the total amount of the oxides is added, and the mixture is heated under the condition that decomposition of the polymerization initiator does not substantially occur, and the vinyl monomer and the radical Polyethylene is impregnated with a polymerizable organic peroxide and a polymerization initiator, and when the impregnation rate reaches the initial 50% by weight or more, the temperature of the aqueous suspension is increased, and the vinyl monomer and the radical polymerizable Organic peroxide in polyethylene Is allowed if,
Obtain a grafting precursor.

By kneading the grafting precursor in a molten state, the multiphase structure type graft copolymer used in the present invention can be obtained. At this time, a polyphase structure type graft copolymer can be obtained by mixing a polyethylene or vinyl (co) polymer into the grafting precursor and kneading the mixture under melting. The radically polymerizable organic peroxide represented by the formula (2) is the following compound.

[0033]

Embedded image

In the formula, R ¹ is a hydrogen atom or a group having 1 to 2 carbon atoms.
R ² is a hydrogen atom or a methyl group; R ³ and R ⁴ are each an alkyl group having 1 to 4 carbon atoms; R ⁵ is an alkyl group having 1 to 12 carbon atoms, a phenyl group, an alkyl-substituted phenyl group or a carbon atom; Shows cycloalkyl groups of the numbers 3 to 12. m is 1 or 2.

The radically polymerizable organic peroxide represented by the formula (3) is the following compound.

[0036]

Embedded image

In the formula, R ⁶ is a hydrogen atom or a group having 1 to 4 carbon atoms.
R ⁷ is a hydrogen atom or a methyl group; R ⁸ and R ⁹ are each an alkyl group having 1 to 4 carbon atoms; R ¹⁰ is an alkyl group having 1 to 12 carbon atoms, a phenyl group, an alkyl-substituted phenyl group or a carbon atom; Shows cycloalkyl groups of the numbers 3 to 12. n is 0, 1 or 2.

The melting and kneading temperature is usually 150 to 35.
0 ° C. If the temperature is lower than 150 ° C., the melting is incomplete or the melt viscosity is high, the mixing becomes insufficient, and phase separation or delamination appears in the molded product, which is not preferable. On the other hand, when the temperature exceeds 350 ° C., decomposition or gelation of the mixed resin occurs, which is not preferable.

As a method of melting and mixing, Banbury
It can be carried out by a commonly used kneading machine such as a mixer, a pressure kneader, a kneading extruder, a twin-screw extruder or a roll. In the present invention, an inorganic flame retardant such as magnesium hydroxide or aluminum hydroxide, an organic flame retardant such as a halogen-based or phosphorus-based, a metal powder, an antioxidant, an ultraviolet ray inhibitor, without departing from the scope of the present invention. Lubricants, dispersants, coupling agents, foaming agents, crosslinking agents, coloring agents, additives such as carbon black, and other polyolefin resins; aromatic polyesters, polyphenylene ethers, polycarbonates
Engineering plastics such as polystyrene, polyoxymethylene, polyphenylene sulfide; polystyrene,
A vinyl resin such as ABS or polyvinyl chloride may be added.

[0040]

The present invention will be described in further detail with reference to Reference Examples, Examples and Comparative Examples. The abbreviations in the table represent the following. mPE: Polyethylene (trade name: Sumikasen E, FV4
04, manufactured by Sumitomo Chemical Co., Ltd.) Weight average molecular weight: about 170,000 (measured by high temperature GPC)) LDPE: polyethylene (trade name: Sumikasen G40)
1. Sumitomo Chemical Co., Ltd.) St: Styrene AN: Acrylonitrile DVB: Divinylbenzene MAA: Methacrylic acid

POM: Polyoxymethylene (trade name: Delrin 100, manufactured by DuPont) PA: Nylon 6 (trade name: MC100L, Kanebo Co., Ltd.)
PBT: Polybutylene terephthalate (trade name: UBE)
PBT1000, manufactured by Ube Industries, Ltd.) PPS: polyphenylene sulfide (trade name: Sumicon FM, MK104, manufactured by Sumitomo Bakelite Co., Ltd.)

The following lubricating oils were used. Dimethyl polysiloxane (trade name: SH200, manufactured by Toray Silicon Co., Ltd.) Stearyl stearate (trade name: Unistar M967
6, Nippon Oil & Fats Co., Ltd.) Gear oil (trade name: Daphne mechanic oil 100)
Idemitsu Kosan Co., Ltd.)

The test method is as follows. (1) Izod impact value (with notch): JIS K7
110 (2) Deflection temperature under load: JIS K7207 (3) Dynamic friction coefficient: As a pin plate type friction test, a load of 1 kgf, a sliding speed of 10 cm / sec, a measurement time of 1 hour, and a partner material: carbon steel S45C were used. (4) Specific wear: JIS as a thrust type friction wear test
According to K7218, load 40kgf, sliding speed 15cm
/ Sec, partner material: carbon steel S45C.

Reference Example 1 (Production of Graft Copolymer of Multi-Phase Structure Type) In a stainless steel autoclave having a volume of 5 liters, 2500 g of pure water was added, and 2.5 g of polyvinyl alcohol as a suspending agent was further added. Dissolved. Polyethylene (trade name: Sumikacene E, FV) synthesized with a metallocene catalyst
404) 700 g, styrene 190 g and acrylonitrile 100 g were added and stirred and dispersed. Then, the autoclave was heated to 75 ° C. and stirred for 2 hours to impregnate styrene and acrylonitrile into polyethylene. Next, the temperature of the autoclave was lowered to 70 ° C., 1.5 g of 3,5,5 trimethylhexanoyl peroxide as a polymerization initiator, and t-butyl peroxymethacryloyloxyethyl carbonate as a radical polymerizable organic peroxide. 4 g was dissolved in a mixed solution of 10 g of styrene, and this solution was charged and stirred in the autoclave.

The temperature of the autoclave was maintained at 70 ° C., and the temperature was maintained for 4 hours to complete the polymerization, followed by washing with water and drying to obtain a graft precursor. The styrene-acrylonitrile copolymer as the grafting precursor was extracted with toluene, and the weight average molecular weight was measured by gel permeation chromatography to be 110,000.

Then, the grafted precursor was subjected to a Labo Plastomill single screw extruder (manufactured by Toyo Seiki Seisaku-sho, Ltd.) for 20 minutes.
It was extruded at 0 ° C. and subjected to a grafting reaction to obtain a multi-phase structure type graft copolymer. When this was analyzed by pyrolysis gas chromatography, the weight ratio (%) of polyethylene: styrene: acrylonitrile was 7
0:20:10. At this time, the graft efficiency of the styrene / acrylic acid polymer segment was 70% by weight.
Met.

The multiphase structure type graft copolymer was observed with a scanning electron microscope “JEOL JSM T300” (manufactured by JEOL Ltd.).
A multiphase structure in which 4 μm spherical resin was uniformly dispersed was observed.

Reference Examples 2 to 11 In the same manner as in Reference Example 1, the composition and the like were changed to the ratios shown in Tables 1 to 3 to synthesize a multiphase-structured graft copolymer. The results are shown in Tables 1 to 3. Indicated.

[0049]

[Table 1]

[0050]

[Table 2]

[0051]

[Table 3]

Reference Example 12 A composition was prepared in the same manner as in Reference Example 1 without using t-butylperoxymethacryloyloxyethyl carbonate, and the results are shown in Table 3.

Example 1 900 g of polyoxymethylene (trade name: Delrin 100, manufactured by DuPont) and 100 g of the multi-phase structure type graft copolymer (A) synthesized in Reference Example 1 were dry-blended.
The mixture was melt-kneaded with a twin-screw extruder (PCM30, manufactured by Ikegai Iron & Steel Corp.) set at 210 ° C. Next, an in-line screw injection molding machine (TS-35-FV2) set to 210 ° C.
Each test piece was prepared using a No. 5 type (manufactured by Tabata Machine Industry Co., Ltd.), and the Izod impact value (Kgfcm / cm ² ), deflection temperature under load (° C.), dynamic friction coefficient (dimensionless), specific wear amount (mm ³⁾ / Kg · Km). Table 4 shows the results.

[0054]

[Table 4]

Examples 2 to 17 As shown in Tables 4 to 7, the ratio of polyoxymethylene, the graft copolymer having a multiphase structure was changed, or another resin was used. Each test piece was prepared by melt-kneading. The test results are shown in Tables 4 to 7.

[0056]

[Table 5]

[0057]

[Table 6]

[0058]

[Table 7]

Examples 18 and 19 In addition to the thermoplastic resin composition shown in Example 1, stearyl stearate (trade name: Unistar M9) was used as a lubricant.
676, manufactured by NOF Corporation) or dimethylpolysiloxane (trade name: SH200, Toray Silicone Co., Ltd.)
Was blended with the composition shown in Table 8, and a test was conducted in the same manner as in Example 1. The results are shown in Table 8.

[0060]

[Table 8]

Examples 20 and 21 The same tests as in Example 1 were carried out except that the polyoxymethylene, the graft copolymer having a multiphase structure and the lubricant were changed to those shown in Table 8, and the results were shown in Table 8. Indicated.

Comparative Example 1 Using the multiphase structure type graft copolymer synthesized in Reference Example 4, melt kneading with polyoxymethylene was carried out in the same manner as in Example 1, and the same test as in Example 1 was carried out. Table 9 shows the results.
It was shown to.

[0063]

[Table 9]

Comparative Examples 2 to 6 As shown in Table 9, the type and amount of the multi-phase structure type graft copolymer were changed and melt-kneaded in the same manner as in Comparative Example 1 to prepare respective test pieces. did. Table 9 shows the test results.
It was shown to.

From the above results, it was found that the thermoplastic resin composition of the present invention and the resin molded product thereof were excellent in sliding performance and mechanical properties. On the other hand, the resin compositions exemplified in the comparative examples cannot achieve both sliding performance and mechanical properties.

[0066]

The thermoplastic resin composition of the present invention has excellent sliding properties while maintaining mechanical and thermal properties.
In addition, it can be easily manufactured only by mixing under melting, and the degree of slidability can be determined by the compounding ratio of the specific multi-phase structure type graft copolymer and lubricant. It is. The thermoplastic resin composition of the present invention and a resin molded product thereof include, for example, automobile parts, home appliance parts,
It can be used for a wide range of applications such as precision machine parts.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C08L 81/02 C08L 81/02 F-term (Reference) 4F071 AA15 AA15X AA28X AA33X AA40 AA45 AA55 AA62 AA71 AA77 AA81 AD02 AE11 AH17 AH18 EA01 4J002 AE05Y BB03Y BN05X BN06X CB00W CF05W CF06W CF07W CF08W CL01W CL03W CN01W CP03Y EC066 EF056 FD17Y FD176 GM00

Claims (3)

[Claims] (1) 50-99% by weight of a thermoplastic resin selected from the group consisting of polyoxymethylene, polyamide, aromatic polyester and polyphenylene sulfide;
And (2) 5 to 95% by weight of an ethylene (co) polymer segment having a weight average molecular weight of 1,000 to 1,000,000 synthesized with a metallocene catalyst and a vinyl monomer. Weight average molecular weight of 1,000
A graft copolymer comprising 5 to 95% by weight of a vinyl (co) polymer segment having a particle size of 0.1 to 1,000,000.
A thermoplastic resin composition containing 1 to 50% by weight of a multiphase structure type graft copolymer dispersed at 001 to 10 μm. 2. The thermoplastic resin composition according to claim 1, further comprising a lubricant. 3. A resin molded product obtained by molding the thermoplastic resin composition according to claim 1 into a predetermined shape.