# US 2023/0265288 A1 · Heat resistance resin composition and injection molded body thereof

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- Number: US 2023/0265288 A1
- Document ID: US20230265288A1
- Status: Published application
- Kind: A1
- Application number: 18/017,963
- Filed: 2021-09-02
- Published: 2023-08-24
- Earliest claimed: 2020-09-09
- Assignees: Denka Company Limited
- Applicants: Denka Company Limited
- Inventors: Soichiro NAKANISHI
- Web page: https://patentgrep.com/patent/US20230265288A1

## CPC

- C08L 25/12: with unsaturated nitriles
- C08L 79/08: Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- B29C 45/0001: {characterised by the choice of material}
- C08F 8/32: by reaction with amines
- C08F 212/10: with nitriles
- C08F 279/04: Vinyl aromatic monomers and nitriles as the only monomers
- B29K 2079/08: {PI, i.e. polyimides or derivatives thereof}
- B29K 2995/0017: Heat stable
- B29L 2031/30: Vehicles, e.g. ships or aircraft, or body parts thereof {(vanes or blades B29L2031/08, air bags B29L2022/027)}
- C08L 2201/08: Stabilised against heat, light or radiation or oxydation
- C08L 2205/025: containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
- C08L 2205/03: containing three or more polymers in a blend
- C08L 2205/035: containing four or more polymers in a blend
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29L: INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES

## Abstract

A heat resistant resin composition which does not cause stringing when performing fusion-bonding using heated plates. A heat resistant resin composition, including: a maleimide-based copolymer; and at least one resin selected from the group including: ABS resin, ASA resin, AES resin, and SAN resin; wherein: the heat resistant resin composition has a ratio G′/G″ of storage modulus (G′) to loss modulus (G″) measured in accordance with JIS K 7244-10 under conditions of 240° C. at an angular velocity of 0.63 rad/s is 0.30 or more and 1.00 or less.

## Claims

### Claim 1

A heat resistant resin composition, comprising:
a maleimide-based copolymer; and
at least one resin selected from the group consisting of: ABS resin, ASA resin, AES resin, and SAN resin; wherein:
the heat resistant resin composition has a ratio G′/G″ of storage modulus (G′) to loss modulus (G″) measured in accordance with JIS K 7244-10 under conditions of 240° C. at an angular velocity of 0.63 rad/s is 0.30 or more and 1.00 or less.

### Claim 2 (depends on 1)

The heat resistant resin composition of claim 1, wherein the maleimide-based copolymer is contained by 5 to 40 mass %, and the resin is contained by 60 to 95 mass %.

### Claim 3 (depends on 1)

The heat resistant resin composition of claim 1, wherein the maleimide-based copolymer comprises 40 to 60 mass % of an aromatic vinyl monomer unit and 60 to 40 mass % of a maleimide-based monomer unit.

### Claim 4 (depends on 1)

The heat resistant resin composition of claim 1, wherein a melt mass flow rate of the heat resistant resin composition measured in accordance with JIS K 7210 under conditions of 220° C. and 10 kg is 5 to 30 g/10 min.

### Claim 5 (depends on 1)

The heat resistant resin composition of claim 1, wherein a Vicat softening temperature of the heat resistant resin composition measured in accordance with JIS K-7206 is 105° C. to 130° C.

### Claim 6 (depends on 1)

An injection molded body molded by using the heat resistant resin composition of claim 1.

### Claim 7 (depends on 6)

The injection molded body of claim 6 used as an interior material or an exterior material of an automobile.