Thermoplastic resin composition and molded product using same

Patent metadata

Field	Value
Publication number	US-11958965-B2
Application number	US-201917043063-A
Country	US
Kind code	B2
Filing date	Apr 1, 2019
Priority date	Mar 30, 2018
Publication date	Apr 16, 2024
Grant date	Apr 16, 2024

Abstract

Provided are a thermoplastic resin composition and a molded product using same, wherein the thermoplastic resin composition includes a base resin including (A-1) 10 wt % to 30 wt % of a first acrylate-based graft copolymer having an acrylate-based rubbery polymer with an average particle diameter of 300 nm to 400 nm; (A-2) 10 wt % to 35 wt % of a second acrylate-based graft copolymer having an acrylate-based rubbery polymer with an average particle diameter of 100 nm to 200 nm; (B) 10 wt % to 15 wt % of an aromatic vinyl compound-vinyl cyanide compound copolymer; and (C) 35 wt % to 55 wt % of α-methylstyrene-based copolymer, and (D) 1 to 5 parts by weight of an ultrahigh molecular weight styrene-acrylonitrile copolymer having a weight average molecular weight of greater than or equal to 5,000,000 g/mol, based on 100 parts by weight of the base resin.

First claim

The invention claimed is:

1. A thermoplastic resin composition, comprising
a base resin comprising
(A-1) 10 wt % to 30 wt % of a first acrylate-based graft copolymer having an acrylate-based rubbery polymer with an average particle diameter of 300 nm to 400 nm;
(A-2) 25 wt % to 35 wt % of a second acrylate-based graft copolymer having an acrylate-based rubbery polymer with an average particle diameter of 100 nm to 200 nm;
(B) 10 wt % to 15 wt % of an aromatic vinyl compound-vinyl cyanide compound copolymer; and
(C) 40 wt % to 50 wt % of α-methylstyrene-based copolymer, and
(D) 1 to 5 parts by weight of an ultrahigh molecular weight styrene-acrylonitrile copolymer having a weight average molecular weight of greater than or equal to 5,000,000 g/mol, based on 100 parts by weight of the base resin.

2. The thermoplastic resin composition of claim 1 , wherein the first acrylate-based graft copolymer (A-1) and/or the second acrylate-based graft copolymer (A-2) is a graft copolymer of 40 wt % to 60 wt % of a mixture of an aromatic vinyl compound and a vinyl cyanide compound onto 40 wt % to 60 wt % of the acrylate-based rubbery polymer.

3. The thermoplastic resin composition of claim 1 , wherein the first acrylate-based graft copolymer (A-1) and/or the second acrylate-based graft copolymer (A-2) is an acrylonitrile-styrene-acrylate graft copolymer.

4. The thermoplastic resin composition of claim 1 , wherein the aromatic vinyl compound-vinyl cyanide compound copolymer (B) is a copolymer of a monomer mixture including 60 wt % to 80 wt % of an aromatic vinyl compound and 20 wt % to 40 wt % of a vinyl cyanide compound.

5. The thermoplastic resin composition of claim 1 , wherein the aromatic vinyl compound-vinyl cyanide compound copolymer (B) has a weight average molecular weight of 80,000 g/mol to 200,000 g/mol.

6. The thermoplastic resin composition of claim 1 , wherein in the aromatic vinyl compound-vinyl cyanide compound copolymer (B), the aromatic vinyl compound comprises styrene unsubstituted or substituted with a halogen or a C1 to C10 alkyl group not including α-methylstyrene, or a combination thereof.

7. The thermoplastic resin composition of claim 1 , wherein in the aromatic vinyl compound-vinyl cyanide compound copolymer (B), the vinyl cyanide compound comprises acrylonitrile, methacrylonitrile, fumaronitrile, or a combination thereof.

8. The thermoplastic resin composition of claim 1 , wherein the α-methylstyrene-based copolymer (C) is a copolymer of a monomer mixture including 50 wt % to 80 wt % of α-methylstyrene, 10 wt % to 50 wt % of a vinyl cyanide compound, and 0 wt % to 40 wt % of an aromatic vinyl compound.

9. The thermoplastic resin composition of claim 8 , wherein in the α-methylstyrene-based copolymer (C), the aromatic vinyl compound comprises styrene unsubstituted or substituted with a halogen or a C1 to C10 alkyl group not including α-methylstyrene, or a combination thereof and the vinyl cyanide compound comprises acrylonitrile, methacrylonitrile, fumaronitrile, or a combination thereof.

10. The thermoplastic resin composition of claim 1 , which further comprises an additive selected from an ultraviolet (UV) stabilizer, a fluorescent whitening agent, a releasing agent, a nucleating agent, an inorganic material, a lubricant, an antistatic agent, a heat stabilizer, an impact-reinforcing agent, a pigment, and/or a dye.

11. A molded product using the thermoplastic resin composition of claim 1 .

Assignees

• Lotte Chemical Corp

Inventors

• Park Jieun
• Kwon Keehae
• Kim Younghyo
• Kim Jungwook
• Shin Hyeongseob

Classifications

• C08L25/12 Primary

  with unsaturated nitriles · CPC title

• C08L25/16 Primary

  Homopolymers or copolymers of alkyl-substituted styrenes · CPC title

• C08L51/04

  grafted on to rubbers · 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

• C08L2205/035

  containing four or more polymers in a blend · CPC title