# US 5,710,212 A · Thermoplastic resin composition

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- Number: US 5,710,212 A
- Document ID: US5710212A
- Status: Granted
- Kind: A
- Application number: 08/671,196
- Filed: 1996-06-27
- Granted: 1998-01-20
- Earliest claimed: 1995-06-28
- Assignees: Ube Industries, Ltd.
- Inventors: Yukihiko Asano; Kazuhiro Doi
- Web page: https://patentgrep.com/patent/US5710212A

## CPC

- C08L 77/00: Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain (of polyhydrazides C08L79/06; of polyamideimides or polyamide acids C08L79/08); Compositions of derivatives of such polymers
- C08L 71/126: {modified by chemical after-treatment}
- C08L 23/02: not modified by chemical after-treatment
- C08L 23/10: Homopolymers or copolymers of propene
- C08L 71/12: Polyphenylene oxides
- Y10S 525/905: Polyphenylene oxide
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## Abstract

A thermoplastic resin composition includes 40-75 parts by weight of a polyamide resin (A), 5-30 parts by weight of a modified polyphenylene ether (B) which is a polyphenylene ether modified with an .beta., .beta.-unsaturated carboxylic acid or a derivative thereof, 1-30 parts by weight of an aromatic vinyl compound-aliphatic hydrocarbon copolymer (C), and 1-30 parts by weight of an ethylene-.alpha.-olefin copolymer (D) or a polypropylene resin (E) with the total amount of the components (A), (B), (C), and (D) or (E) being 100 parts by weight. The polyamide resin (A) is present as a matrix phase and the other components (B), (C), and (D) or (E) are present as a disperse phase consisting of core-shell structure grains, in each of which grains the modified polyphenylene ether (B) forms a shell phase, the aromatic vinyl compound-aliphatic hydrocarbon copolymer (C) forms an intermediate phase and the ethylene-.alpha.-olefin copolymer(D) or the polypropylene resin (E) forms a core phase.

## Claims

### Claim 1

A thermoplastic resin composition comprising:
40-75 parts by weight of a polyamide resin (A),
5-30 parts by weight of a modified polyphenylene ether (B) which is a polyphenylene ether modified with an .alpha.,.beta.-unsaturated carboxylic acid or a derivative thereof,
1-30 parts by weight of an aromatic vinyl compound-aliphatic hydrocarbon copolymer (C), and
1-30 parts by weight of a copolymer of ethylene with an .alpha.-olefin of 3 or more carbon atoms (D): with the total amount of the components (A), (B), (C) and (D) being 100 parts by weight, wherein the component (A) is present as a matrix phase and the other components (B), (C) and (D) are present as a disperse phase consisting of core-shell structure grains, in each of which grains the modified polyphenylene ether (B) forms a shell phase, the aromatic vinyl compound-aliphatic hydrocarbon copolymer (C) forms an intermediate phase and the copolymer of ethylene with the .alpha.-olefin (D) forms a core phase.

### Claim 2

A thermoplastic resin composition comprising:
40-75 parts by weight of a polyamide resin (A),
5-30 parts by weight of a modified polyphenylene ether (B) which is a polyphenylene ether modified with an .alpha.,.beta.-unsaturated carboxylic acid or a derivative thereof,
1-30 parts by weight of an aromatic vinyl compound-aliphatic hydrocarbon copolymer (C), and
1-30 parts by weight of a polypropylene resin (E) with the total amount of the components (A), (B), (C) and (E) being 100 parts by weight, wherein the component (A) is present as a matrix phase and the other components (B), (C) and (E) are present as a disperse phase consisting of core-shell structure grains, in each of which grains the modified polyphenylene ether (B) forms a shell phase, the aromatic vinyl compound-aliphatic hydrocarbon copolymer (C) forms an intermediate phase and the polypropylene resin (E) forms a core phase.

### Claim 3 (depends on 1, 2)

A thermoplastic resin composition according to claim 1 or 2, wherein the aromatic vinyl compound-aliphatic hydrocarbon copolymer (C) is a hydrogenated or non-hydrogenated styrene-butadiene copolymer.

### Claim 4 (depends on 1, 2)

A thermoplastic resin composition according to claim 1 or 2, wherein the aromatic vinyl compound-aliphatic hydrocarbon copolymer (C) is a hydrogenated or non-hydrogenated styrene-isoprene copolymer.

### Claim 5 (depends on 1, 2)

A thermoplastic resin composition according to claim 1 or 2, wherein the polyamide resin (A) has a number-average molecular weight of 10,000-50,000.

### Claim 6 (depends on 1, 2)

A thermoplastic resin composition according to claim 1 or 2, wherein the modified polyphenylene ether (B) has an intrinsic viscosity of 0.2-1.0 dl/g as measured at 25.degree. C. in chloroform.

### Claim 7 (depends on 1, 2)

A thermoplastic resin composition according to claim 1 or 2, wherein the aromatic vinyl compound-aliphatic hydrocarbon copolymer (C) has a number-average molecular weight of 20,000-250,000.

### Claim 8 (depends on 1)

A thermoplastic resin composition according to claim 1, wherein the ethylene-.alpha.-olefin copolymer (D) has an ethylene content of 30-85 mole %.

### Claim 9 (depends on 2)

A thermoplastic resin composition according to claim 2, wherein the polypropylene resin (E) has a melt flow rate of 0.3-150 g/10 min as measured at 230.degree. C. under a load of 2.16 kg according to ASTM D 1238.