JPS60186560A - Thermoplastic resin composition - Google Patents

Abstract

PURPOSE:A polyphenylene ether resin composition providing a molded article having improved frictional resistance and wear resistance characteristics, obtained by blending a polyphenylene ether resin with a specific amount of a polyamide elastomer. CONSTITUTION:100pts.wt. polyphenylene ether resin (including homopolymer, copolymer, graft copolymer and resin blended with other resins) obtained by subjecting a monocyclic phenol shown by the formula (R1 is 1-3C alkyl; R2 and R3 are H, or 1-3C alkyl; ortho position at least one side of hydroxyl group has lower alkyl) to polycondensation is blended with 0.01-50pts.wt., preferably 0.1-30pts.wt. polyamide elastomer containing 95-10wt% hard segment consisting of >=6C aminocarboxylic acid or lactam or nylon mn salt where m+n>=12.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a resin composition, particularly a thermoplastic resin composition used as a resin molded article requiring abrasion resistance. More specifically, in order to obtain a molded product that requires a part with good one-force friction and chewing properties, 0.01 to 50 parts by weight of polyamide elastomer is blended with 100 parts by weight of polyphenylene ether resin. The present invention relates to a thermoplastic resin composition.

Polyphenylene ether resins have poor friction and wear resistance and have not been applied to parts that are subject to friction and wear.

In addition, if there are parts that require partial friction and wear resistance due to the design, insert molding of small parts made of resin with good friction and wear resistance such as nylon resin or acetal resin is performed. One part is reinforced by inserting or inserting teeth.

In addition, in cases where flat surface friction and abrasion resistance is required, all applications can be satisfied by laminating a fluorine patterned surface or a sheet or film made of nylon resin.

However, although this combined use of resins can be applied to simple shapes, it may be difficult to assemble resin molded products with complex shapes, or the inserts may be complicated. Difficult to apply. In this way, the combined use of resin has limitations depending on its shape, and
There are many problems because it takes a lot of man-hours.

An object of the present invention is to provide a resin composition that does not have the above-mentioned disadvantages, allows molded products with good friction and wear characteristics to be made from a polyphenylene ether resin, and allows complex molded products to be obtained. Especially.

As a result of intensive cross-opening efforts to obtain such a resin composition, the present inventors discovered that polyphenylene ether resin J()0
Based on parts by weight, polyamide elastomer f1. ．． 01～
This objective was achieved by a thermo-d1 plastic resin composition in which 50 parts by weight were mixed.

Polyamide elastomer itself differs from polyamide in that it has a low limit Pv value and does not have particularly excellent frictional properties. Also, unlike silicone oil, carbon, etc., it does not itself have sufficient lubricity.

A molded product obtained by mixing such a polymer compound with a polyphenylene ether resin has significantly improved friction properties, even though the polyphenylene ether resin is used as the base material. I discovered that.

The polyphenylene ether used in the present invention is a polyphenylene ether obtained by polycondensing one or more monocyclic phenols represented by the general formula (■),
It may be a homopolymer or a copolymer.
R2 and R3 are a hydrogen atom or a lower alkyl group having 1 to 1 carbon atoms, and a lower argyl substituent must always be present at the ortho position of at least one of the hydroxyl groups. Old layer compound It also includes graft copolymers obtained by graft polymerization.

Furthermore, the definition of polyphenylene ether resin in the present invention also includes a composition obtained by mixing the polyphenylene ether and other resin components.

Examples of the monocyclic phenol represented by the general formula (I) include 2,6-dimethylphenol, so(S-diethylphenol, 2,6-dipropylphenol, 2-
Methyl-6-ethylphenol, 2-methyl-6-propylphenol, 2-ethyl-+1-propylphenol, m-cresol, 2. ;)-dimethylphenol, 2. :(-diethylphenol, 2.3-dipropylphenol: (-ethylphenol, 2-methyl-3-propylphenol, 2-ethyl-; 3-methylphenol, 2-
Ethyl m: 5-propylphenol, 2-tulovir 12(-methylphenol, 2-propyl m:(-ethylphenol, 2.:3, U-trimethylphenol,
2. 2<, 1. + - Triethylphenol (;-
Tripropylphenol, 2.0-dimethyl-;)-ethylphenol, 2-dimethyl-;5-propylphenol and the like are encouraged. As the polyphenylene ether obtained by the 20-car contraction of the phenol C), for example, poly(211-dimethyl-1
,・1-phenylene) ether, poly(2(i-diethyl-1.・1-phenylene) ether, poly(2.
0-mbrobyl-1,/l-7enylene) ether, poly(2-methyl-6-nityl-1,11-phenylene)
Ether, po IJ (2-methyl-, 'l+-furopyru 1.4-phenylene) ether, bo IJ (2
-ethyl-6-broby-1; 4-phenylene)
Ether, 2,6-dimethylphenol/2&6-drimethylphenol copolymer, 2, (!-dimethylphenol/2, 8. 6-) ethylphenol copolymer, 2,6-diethylphenol/2, :(,
Examples include 11-trimethylphenol copolymer, 2,6-dipropylphenol/2,36-)limethylphenol copolymer, etc.b Other thermoplastic resin components to be mixed with polyphenylene ether include vinyl aromatic resins. It's a good thing. A resin containing at least 25 ml of single structural units represented by the following general formula (n) in its polymer, (where R4 is an aqueous atom or a lower alkyl group, and Z is a halogen atom or a lower alkyl group). and p is 0 or 1~
; )) For example, polystyrene, rubber-reinforced polystyrene, poly(
Styrene/acrylonitrile) copolymers, rubber-reinforced (styrene/acrylonitrile) copolymers, etc., but some of these styrenes or acrylonitriles are α-methylstyrene, acrylic esters, methacrylic esters, and unsaturated dicarboxylic acids. , unsaturated dicarboxylic acid anhydrides, etc., which are substituted with unsaturated monomers that can be co-Φ-combined with styrene. 's fever i, i ding!
1. Copolymers of diene compounds such as polybutadiene and polyisoglare and vinyl aromatic compounds, nitrile rubber, ethylene-propylene copolymers, ethylene-propylene-diene copolymer, thiol rubber, polysulfide rubber, acrylic IYZ coat, 'ij5
The present invention can also be applied to polyurethane and polyester elastomer.

In the present invention, the polyamide elastomer refers to an aminocarboxylic acid or lactam having 6 or more carbon atoms or m-
1-n≧12 nylon nl? 1. J:! , Akira 1゛)
A hard segment of 95 to 10, preferably ←j aim 1
It refers to a polyamide copolymer containing 11 to 20, more preferably 80 to 3;

Aminocarboxylic acid or lactam having 6 or more carbon atoms here
) include ω-aminocaproic acid, ω-aminoenanthate, ω-aminocaprylminobervonic acid, ω-aminocaprin l'i2,',
, I1'-aminoundecanoic acid, aminocarboxylic acids such as 12-aminododecanoic acid, or caprolactam,
Lactams such as laurolactam and nylon (j +11+
,, If-40, (J-1 2, 1. 1-
(1, i. l - i. 01]. , 1・j2,
■ Examples include nylon salts such as 2.6, 12.IIJ, 12.]2.

The soft segment, which is the second component of the polyamide copolymer of the present invention, is a material other than nylon that is compatible with the polyphenyl ether resin and has a miscibility of 7ml or more, and can be copolymerized with the polyamide component.

Specifically, poly(alkylene oxide) glycol,
Examples include polyentyl polyol, polycaprolactone polyol, and polycarbonate polyol. Further, the OH groups of these polyols may be aminated or carboxylated. Examples of poly(alkylene oxide) glycols include polyethylene glycol, poly('', 2 and J,; 3 propylene oxide) glycol, poly(tetramethylene oxide) glycol, poly(hexamethylene oxide) glycol, ethylene oxide and brobylene oxide. Block or random co-Φ' combination 1+, Bukonoku Xt-1 random co-I11 combination of ethylene oxide and tetrahydrofuran, etc. are used.

Average molecule of this: 14 is 500 to 2+ O fl
(It is l.

In the present invention, both ends of poly(alkylene oxide) glycol may be aminated or carboxylated. The bond between the first component and the second component may be an ester bond or an amide bond depending on the terminal of the second component. components can be used.

As a specific synthesis method, for example, time 11i4 50
-45419, JP-A-55-1; (1:i4 is shown in 842/l, etc.).

As dicarboxylic acids, those having 4 to 2 carbon atoms can be considered, including terephthalic acid, isophthalic acid, phthalic acid, naphthalene-2. 6-dicarboxylic acid, naphthalene-2,7-dicarboxylic acid, diphenyl-4,4 dicarboxylic acid, diphenoxyethane dicarboxylic acid, 3-sulfoisophthalic acid 11
Aromatic dicarvone such as sodium sodium 1. f,'1.
4-Cyclohexanedicarvone to % 1+ 2-cyclohexanedicarvone ability, dicyclohexyl-4.4 dicarboxylic fat LiJ group dicarbonyl V and amber nushu equipment adipine 'mosquito, sebacic acid, dodecane dicarboxylic acid @' liff rib Oak.

Mention may be made of dicarboxylic acids.

As the diamine, aromatic, alicyclic, and aliphatic groups are used. Specifically, as aliphatic cyamine,
Hexamethylene diamine comes to mind.

The polyamide elastomer is preferably blended in an amount of 0.01 to 50 parts by weight, preferably 0.1 to 30 parts by weight, and more preferably 0.5 to 15 parts by weight, per 100 parts by weight of the polyphenylene ether resin.

If the amount of the polyamide elastomer blended is less than 0.01 part per 100 parts by weight of the polyphenylene ether resin, the effect of improving friction and wear characteristics will be small. Further, if the amount is 50 parts by weight or more based on 100 parts by weight of the polyphenylene ether resin, it is not preferable because mechanical strength will decrease.

The resin composition of the present invention is effective as a material for molded products having sliding parts as described above, and molded products having sliding parts specifically include bearings, cams, pistons, and hubs for VTR cassettes. Pulleys, ratchet gears, small power transmission gears,
Examples include pushers, switches, control levers for car heaters and air conditioners, enclosures for devices with rotating bearings, and cassette cases for recording.

In the resin composition according to the present invention, if necessary, 5 may be added to fillers or reinforcing agents such as lubricants, dispersants, stabilizers, dyes and pigments, flame retardants, antistatic agents, and glass fibers. Of course.

Examples and comparative examples will be described below.

Examples and Comparative Examples In this experiment, the polyphenylene needle resin was
E, P, L containing 5 parts by weight or more of polyphenylene ether
The resin manufactured by Daicel Chemical Industries, Ltd. under the trade name "Noryl", Grade 731J was used, while the polyamide elastomer was used under the trade name "Diamide PAE E47L" manufactured by Daicel Chemical Industries, Ltd.
was used.

E47L was synthesized from 60% by weight of lauryllactam, 41% by weight of α,w-dihydroxy(polytetrahydrofuran) having an average molecular weight of 1.000, and 9% by weight of dotecanedicarboxylic acid.

Table 1 shows the position of individual components used as raw materials.
It was shown to. Weigh the above raw materials at the blending ratio shown in Table 2,
Mix each and put the mixture into a 40mmφ extruder (L/
D=20), the resin composition was kneaded and extruded and pelletized to obtain a resin composition.

The resin-combined acid pellets thus obtained were injection molded using an injection molding machine TS-100 manufactured by Nissei Plastics. The friction and wear test piece has an inner diameter of 20 mmφ, an outer diameter of 26 mmφ, and a height of 1.
．． A 5 mm cylindrical test piece for a Suzuki friction and wear tester was molded. The molding conditions were cylinder temperature 200℃, mold temperature 50℃, injection pressure 65kg/cm2G, and cycle 60.
The test piece was formed in seconds. The same injection molding machine was used for measuring mechanical properties, and the cylinder temperature was 200°C, the mold temperature was 50°C, the injection pressure was 65kg/cm2G, and the cycle was 60 seconds.

Friction and wear tests and mechanical strength tests were conducted using the thus formed test pieces.

In the friction and wear test, a steel test piece of the same shape as this test piece was installed in the lower rotating part of the Suzuki type friction and wear tester, and a compounded resin molded test piece was installed in the upper stationary part, and the surface pressure was 1 kg/cm2 and the average circumference was set. Measurements were performed without lubrication under sliding conditions of 10 m/min.

The specific wear amount (unit: mm3/kg·km) was calculated using the following formula.

In the same manner as in the examples, a resin from companies E, P, and L, trade name "Noryl", and clade 731J was used as the polyphenylene needle-based resin, and polyester elastomer (Pervrene P-150B) was blended with this, and " A friction and wear test was conducted using "Noryl Grade 731J" itself. The conditions for molding the test piece and the conditions for measurement were the same as in the examples.

Measurement of mechanical properties is ASTM D638, ASTM D7
90, according to the method of ASTM D256.

Table 3 shows the results measured according to the conditions described above.

Claims (1)

[Claims] 1. A thermoplastic resin composition comprising 0.01 to 5.0 parts by weight of a polyamide elastomer to 100 parts by weight of a polyphenylene ether resin.