# US 12,110,391 B2 · Resin composition and molded body

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- Number: US 12,110,391 B2
- Document ID: US12110391B2
- Status: Granted
- Kind: B2
- Application number: 17/432,285
- Filed: 2020-03-13
- Published: 2022-06-02
- Granted: 2024-10-08
- Earliest claimed: 2019-03-26
- Assignees: Dow-Mitsui Polychemicals Co., Ltd.
- Applicants: Dow-Mitsui Polychemicals Co., Ltd.
- Inventors: Takahiro Shimizu; Kazuyuki Oogi; Sadaki Yamamoto; Chikara Ichinoseki
- Web page: https://patentgrep.com/patent/US12110391B2

## CPC

- C08L 77/02: Polyamides derived from omega-amino carboxylic acids or from lactams thereof (C08L77/10 takes precedence)
- C08L 77/06: Polyamides derived from polyamines and polycarboxylic acids (C08L77/10 takes precedence)
- C08L 2205/03: containing three 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)

## Abstract

A resin composition includes: a polyamide resin (A); an ionomer of an ethylene-unsaturated carboxylic acid-based copolymer (B); and an ethylene-based polymer (C), wherein a content of the polyamide resin (A) is 50% by mass or more with respect to a total amount of the polyamide resin (A), the ionomer of an ethylene-unsaturated carboxylic acid-based copolymer (B) and the ethylene-based polymer (C), and wherein a content of the ethylene-based copolymer (C) is less than 50% by mass with respect to a total amount of the ionomer of an ethylene-unsaturated carboxylic acid-based copolymer (B) and the ethylene-based polymer (C).

## Claims

### Claim 1

A resin composition comprising:
a polyamide resin (A);
an ionomer of an ethylene-unsaturated carboxylic acid-based copolymer (B); and
an ethylene-based polymer (C) that is not the ionomer of an ethylene-unsaturated carboxylic acid-based copolymer (B),
wherein the content of the polyamide resin (A) is 50% by mass or more with respect to the total amount of the polyamide resin (A), the ionomer of an ethylene-unsaturated carboxylic acid-based copolymer (B) and the ethylene-based polymer (C),
wherein the content of the ethylene-based copolymer (C) is less than 50% by mass with respect to the total amount of the ionomer of an ethylene-unsaturated carboxylic acid-based copolymer (B) and the ethylene-based polymer (C),
wherein the content of the ethylene-based polymer (C) is from more than 0% by mass to 2.5% by mass with respect to the total amount of the resin composition,
wherein the ethylene-based polymer (C) comprises an ethylene-unsaturated ester copolymer, and
wherein the polyamide resin (A) is at least one selected from the group consisting of Nylon 4, Nylon 6, Nylon 46, Nylon 66, Nylon 610, Nylon 612, Nylon 11, Nylon 12, and a copolymer thereof.

### Claim 2 (depends on 1)

The resin composition according to claim 1, wherein the content of the ionomer of an ethylene-unsaturated carboxylic acid-based copolymer (B) is 35% by mass or less with respect to the total amount of the polyamide resin (A), the ionomer of an ethylene-unsaturated carboxylic acid-based copolymer (B) and the ethylene-based polymer (C).

### Claim 3 (depends on 1)

The resin composition according to claim 1, wherein the melt flow rate of the ethylene-based polymer (C) is 0.1 to 600 g/10 min., the melt flow rate being measured in accordance with JIS K7210-1:2014 under conditions of 190° C. and a load of 2160 g.

### Claim 4 (depends on 1)

The resin composition according to claim 1, wherein the melt flow rate of the ionomer of an ethylene-unsaturated carboxylic acid-based copolymer (B) is 0.1 to 100 g/10 min., the melt flow rate being measured in accordance with JIS K7210-1:2014 under conditions of 190° C. and a load of 2160 g.

### Claim 5 (depends on 1)

The resin composition according to claim 1, wherein the content of a structural unit derived from an unsaturated carboxylic acid in the ethylene-unsaturated carboxylic acid-based copolymer of the ionomer of an ethylene-unsaturated carboxylic acid-based copolymer (B) is 5 to 25% by mass with respect to the total amount of the ethylene-unsaturated carboxylic acid-based copolymer.

### Claim 6 (depends on 1)

A molded body, which is a molded product of the resin composition according to claim 1.