Thermoplastic resin composition, method of preparing the same, and molded article manufactured using the same

Patent metadata

Field	Value
Publication number	US-12134689-B2
Application number	US-202017299256-A
Country	US
Kind code	B2
Filing date	Sep 11, 2020
Priority date	Sep 18, 2019
Publication date	Nov 5, 2024
Grant date	Nov 5, 2024

Abstract

The present invention relates to a thermoplastic resin composition, a method of preparing the same, and a molded article manufactured using the same. More specifically, the thermoplastic resin composition of the present invention includes 100 parts by weight of a base resin consisting of an acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer (A-1) containing acrylate rubber having an average particle diameter of 0.05 to 0.15 μm as a core, an acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer (A-2) containing acrylate rubber having an average particle diameter of 0.3 to 0.6 μm as a core, an aromatic vinyl polymer (B-1), and a heat-resistant aromatic vinyl polymer (B-2); and 0.5 to 10 parts by weight of a polyolefin elastomer (C). Within this range, the thermoplastic resin composition may have a heat deflection temperature (HDT) of 89° C. or more.

First claim

The invention claimed is:

1. A thermoplastic resin composition, comprising:
100 parts by weight of a base resin consisting of an acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer (A-1) containing acrylate rubber having an average particle diameter of 0.05 to 0.15 μm as a core, an acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer (A-2) containing acrylate rubber having an average particle diameter of 0.3 to 0.6 μm as a core, an aromatic vinyl polymer (B-1), and a heat-resistant aromatic vinyl polymer (B-2); and
0.5 to 10 parts by weight of a polyolefin elastomer (C),
wherein the thermoplastic resin composition has a heat deflection temperature (HDT) of 89° C. or more,
wherein a weight ratio of the graft copolymer (A-1) to the graft copolymer (A-2) is 1:1.1 to 1:5,
wherein the aromatic vinyl polymer (B-1) is a styrene-acrylonitrile copolymer,
wherein the heat-resistant aromatic vinyl polymer (B-2) is an aromatic vinyl polymer comprising one or more selected from the group consisting of alpha-methylstyrene and maleimide-based compounds as a heat-resistant monomer, and
wherein the polyolefin elastomer (C) is one or more selected from ethylene-alpha-olefin copolymers.

2. The thermoplastic resin composition according to claim 1 , wherein the graft copolymer (A-1) is contained in an amount of 1 to 30% by weight, the graft copolymer (A-2) is contained in an amount of 5 to 50% by weight, the aromatic vinyl polymer (B-1) is contained in an amount of 40 to 85% by weight, and the heat-resistant aromatic vinyl polymer (B-2) is contained in an amount of 5 to 50% by weight.

3. The thermoplastic resin composition according to claim 1 , wherein the graft copolymer (A-1) and the graft copolymer (A-2) independently comprise 40 to 60% by weight of acrylate rubber, 25 to 45% by weight of an aromatic vinyl compound, and 10 to 20% by weight of a vinyl cyanide compound.

4. The thermoplastic resin composition according to claim 1 , wherein the polyolefin elastomer (C) has a melt index (190° C., 2.16 kg) of 0.3 to 20 g/10 minutes.

5. The thermoplastic resin composition according to claim 1 , wherein the thermoplastic resin composition has an Izod impact strength (¼ inch, ASTM D1238) of 6 kg·cm/cm or more.

6. The thermoplastic resin composition according to claim 1 , wherein the thermoplastic resin composition has a melt index (220° C., 10 kg) of 9 g/10 minutes or more.

7. A molded article, comprising the thermoplastic resin composition of claim 1 .

8. A method of preparing a thermoplastic resin composition, the method comprising:
kneading and extruding, under conditions of 200 to 330° C. and 100 to 500 rpm,
100 parts by weight of a base resin consisting of an acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer (A-1) containing acrylate rubber having an average particle diameter of 0.05 to 0.15 μm as a core, an acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer (A-2) containing acrylate rubber having an average particle diameter of 0.3 to 0.6 μm as a core, an aromatic vinyl polymer (B-1), and a heat-resistant aromatic vinyl polymer (B-2); and 0.5 to 10 parts by weight of a polyolefin elastomer (C),
wherein the thermoplastic resin composition has a heat deflection temperature (HDT) of 89° C. or more,
wherein a weight ratio of the graft copolymer (A-1) to the graft copolymer (A-2) is 1:1.1 to 1:5,
wherein the aromatic vinyl polymer (B-1) is a styrene-acrylonitrile copolymer,
wherein the heat-resistant aromatic vinyl polymer (B-2) is an aromatic vinyl polymer comprising one or more selected from the group consisting of alpha-methylstyrene and maleimide-based compounds as a heat-resistant monomer, and
wherein the polyolefin elastomer (C) is one or more selected from ethylene-alpha-olefin copolymers.

9. A thermoplastic resin composition, comprising:
100 parts by weight of a base resin consisting of 1 to 30% by weight of an acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer (A-1) containing acrylate rubber having an average particle diameter of 0.05 to 0.15 μm as a core, 5 to 50% by weight of an acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer (A-2) containing acrylate rubber having an average particle diameter of 0.3 to 0.6 μm as a core, 40 to 85% by weight of an aromatic vinyl polymer (B-1), and 5 to 50% by weight of a heat-resistant aromatic vinyl polymer (B-2); and
0.5 to 10 parts by weight of a polyolefin elastomer (C),
wherein a weight ratio of the graft copolymer (A-1) to the graft copolymer (A-2) is 1:1.1 to 1:5,
wherein the aromatic vinyl polymer (B-1) is a styrene-acrylonitrile copolymer,
wherein the heat-resistant aromatic vinyl polymer (B-2) is an aromatic vinyl polymer comprising one or more selected from the group consisting of alpha-methylstyrene and maleimide-based compounds as a heat-resistant monomer, and
wherein the polyolefin elastomer (C) is one or more selected from ethylene-alpha-olefin copolymers.

Assignees

• Lg Chemical Ltd

Inventors

• Jang Jeongmin
• Kim Tae Hoon
• Park Chun Ho
• Sung Da Eun
• An Yong Hee
• Cho Wangrae
• Kim Ho Hoon

Classifications

• C08L23/0815

  with aliphatic 1-olefins containing one carbon-to-carbon double bond · CPC title

• C08L51/04 Primary

  grafted on to rubbers · CPC title

• C08L2205/035

  containing four or more polymers in a blend · CPC title

• C08L2205/025

  containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure · CPC title

• C08L2201/08

  Stabilised against heat, light or radiation or oxydation · CPC title