Thermoplastic resin composition and molded article thereof

Patent metadata

Field	Value
Publication number	US-10633536-B2
Application number	US-201616062136-A
Country	US
Kind code	B2
Filing date	Dec 2, 2016
Priority date	Dec 21, 2015
Publication date	Apr 28, 2020
Grant date	Apr 28, 2020

Abstract

A resin composition which comprises 100 parts by weight of a resin having a carboxyl group in at least part of the end of the molecular chain, 5 to 80 parts by weight of an ethylene-α-olefin copolymer, 1 to 30 parts by weight of an epoxy group-containing silicon elastomer and 0.01 to 3 parts by weight of at least one antioxidant selected from the group consisting of hindered phenol compound, phosphite compound, phosphonite compound and thioether compound and has low-temperature impact resistance and suppresses delamination.

First claim

The invention claimed is:

1. A resin composition comprising:
(A) 100 parts by weight of a resin having a carboxyl group in at least part of the end of the molecular chain,
(B) 5 to 80 parts by weight of an ethylene-α-olefin copolymer,
(C) 1 to 30 parts by weight of an epoxy group-containing crosslinked silicone elastomer, and
(D) 0.01 to 3 parts by weight of at least one antioxidant selected from the group consisting of hindered phenol compound, phosphite compound, phosphonite compound and thioether compound.

2. The resin composition according to claim 1 , wherein the resin is an aromatic polyester.

3. The resin composition according to claim 1 , wherein the ethylene-α-olefin copolymer is an ethylene-α-olefin copolymer modified with an unsaturated carboxylic acid or an acid derivative thereof.

4. The resin composition according to claim 1 , wherein the resin is an aromatic polyester comprising 80 to 100 mol % of naphthalene dicarboxylic acid and 0 to 20 mol % of at least one selected from the group consisting of terephthalic acid and isophthalic acid as dicarboxylic acid components and ethylene glycol as a diol component.

5. A method of improving the low-temperature impact resistance of a molded article, wherein a molded article of the resin composition of claim 1 is heated at a temperature range from (glass transition temperature of the resin −40° C.) to (glass transition temperature of the resin +40° C.).

6. The resin composition according to claim 2 , wherein the ethylene-α-olefin copolymer is an ethylene-α-olefin copolymer modified with an unsaturated carboxylic acid or an acid derivative thereof.

7. The resin composition according to claim 2 , wherein the resin is an aromatic polyester comprising 80 to 100 mol % of naphthalene dicarboxylic acid and 0 to 20 mol % of at least one selected from the group consisting of terephthalic acid and isophthalic acid as dicarboxylic acid components and ethylene glycol as a diol component.

8. The resin composition according to claim 3 , wherein the resin is an aromatic polyester comprising 80 to 100 mol % of naphthalene dicarboxylic acid and 0 to 20 mol % of at least one selected from the group consisting of terephthalic acid and isophthalic acid as dicarboxylic acid components and ethylene glycol as a diol component.

9. The resin composition according to claim 6 , wherein the resin is an aromatic polyester comprising 80 to 100 mol % of naphthalene dicarboxylic acid and 0 to 20 mol % of at least one selected from the group consisting of terephthalic acid and isophthalic acid as dicarboxylic acid components and ethylene glycol as a diol component.

10. A method of improving the low-temperature impact resistance of a molded article, wherein a molded article of the resin composition of claim 2 is heated at a temperature range from (glass transition temperature of the resin −40° C.) to (glass transition temperature of the resin +40° C.).

11. A method of improving the low-temperature impact resistance of a molded article, wherein a molded article of the resin composition of claim 3 is heated at a temperature range from (glass transition temperature of the resin −40° C.) to (glass transition temperature of the resin +40° C.).

12. A method of improving the low-temperature impact resistance of a molded article, wherein a molded article of the resin composition of claim 6 is heated at a temperature range from (glass transition temperature of the resin −40° C.) to (glass transition temperature of the resin +40° C.).

13. A method of improving the low-temperature impact resistance of a molded article, wherein a molded article of the resin composition of claim 4 is heated at a temperature range from (glass transition temperature of the resin −40° C.) to (glass transition temperature of the resin +40° C.).

14. A method of improving the low-temperature impact resistance of a molded article, wherein a molded article of the resin composition of claim 7 is heated at a temperature range from (glass transition temperature of the resin −40° C.) to (glass transition temperature of the resin +40° C.).

15. A method of improving the low-temperature impact resistance of a molded article, wherein a molded article of the resin composition of claim 8 is heated at a temperature range from (glass transition temperature of the resin −40° C.) to (glass transition temperature of the resin +40° C.).

16. A method of improving the low-temperature impact resistance of a molded article, wherein a molded article of the resin composition of claim 9 is heated at a temperature range from (glass transition temperature of the resin −40° C.) to (glass transition temperature of the resin +40° C.).

Assignees

• Teijin Ltd

Inventors

• Nakatani Yuji
• Matsuno Yuichi

Classifications

• C08L69/005 Primary

  Polyester-carbonates · CPC title

• C08L81/02

  Polythioethers; Polythioether-ethers · CPC title

• C08K5/37

  Thiols · CPC title

• C08K5/52

  Phosphorus bound to oxygen only · CPC title

• C08L2203/30

  used for thermoforming · CPC title