# US 10,865,266 B2 · Thermoplastic resin composition

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- Number: US 10,865,266 B2
- Document ID: US10865266B2
- Status: Granted
- Kind: B2
- Application number: 15/778,172
- Filed: 2016-12-07
- Published: 2018-10-04
- Granted: 2020-12-15
- Earliest claimed: 2015-12-15
- Assignees: Nippon A&L Inc.
- Applicants: Nippon A&L Inc.
- Inventors: Taka Ikeda; Takayoshi Fujiwara
- Web page: https://patentgrep.com/patent/US10865266B2

## CPC

- C08F 257/02: on to polymers of styrene or alkyl-substituted styrenes
- C08F 212/08: Styrene
- C08F 222/36: Amides or imides
- C08F 279/04: Vinyl aromatic monomers and nitriles as the only monomers
- C08L 25/12: with unsaturated nitriles
- C08L 35/06: Copolymers with vinyl aromatic monomers
- C08F 2500/17: Viscosity
- C08F 2800/20: as weight or mass percentages
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)

## Abstract

The present invention provides a thermoplastic resin composition comprising 10 to 60 mass % of a graft copolymer (A), 1 to 20 mass % of a copolymer (B), 10 to 88 mass % of a copolymer (C), and 1 to 10 mass % of a copolymer (D). The contents of (A) to (D) are each relative to the total amount thereof. Copolymers (A), (B), (C), and (D) are as described in the specification.

## Claims

### Claim 1

A thermoplastic resin composition comprising:
a graft copolymer (A) obtained by graft polymerization of aromatic vinyl monomers and monomers other than maleimide monomers that can be copolymerized with the aromatic vinyl monomers under the presence of a rubbery polymer;
a copolymer (B) obtained by polymerization of only maleimide monomers and at least one type of other monomers selected from the group consisting of aromatic vinyl monomers, vinyl cyanide monomers, amide monomers, unsaturated carboxylic acid monomers, and combinations thereof;
a copolymer (C) having a reduced viscosity of less than 1.0 dl/g obtained by polymerization of aromatic vinyl monomers and monomers other than maleimide monomers that can be copolymerized with the aromatic vinyl monomers; and
a copolymer (D) having a reduced viscosity of 1.0 to 3.0 dl/g obtained by polymerization of aromatic vinyl monomers and monomers other than maleimide monomers that can be copolymerized with the aromatic vinyl monomers, wherein
the content of the graft copolymer (A) is 10 to 60 mass %, the content of the copolymer (B) is 1 to 20 mass %, the content of the copolymer (C) is 10 to 88 mass %, and the content of the copolymer (D) is 1 to 10 mass %, based on the total amount of the graft copolymer (A), the copolymer (B), the copolymer (C), and the copolymer (D);
the reduced viscosity is measured after dissolving the copolymer (C) or (D) in N,N-dimethylformamide to make a solution at a concentration of 0.4 g/100 ml then measuring at a temperature of 30° C.

### Claim 2 (depends on 1)

The thermoplastic resin composition according to claim 1, wherein the thermoplastic resin composition has a melt volume rate of 15 cm3/10 min or more as measured under conditions of a measurement temperature of 220° C. and a measurement load of 10 kgf.

### Claim 3 (depends on 2)

The thermoplastic resin composition according to claim 2, wherein the copolymer (D) has a reduced viscosity of 1.0 to 1.4 dl/g.

### Claim 4 (depends on 1)

The thermoplastic resin composition according to claim 1, wherein the copolymer (D) has a reduced viscosity of 1.0 to 1.4 dl/g.

### Claim 5 (depends on 1)

The thermoplastic resin composition according to claim 1, wherein the copolymer (B) is obtained by polymerization of only maleimide monomers and at least one type of other monomers selected from aromatic vinyl monomers, amide monomers, and unsaturated carboxylic acid monomers.