Thermoplastic resin composition and molded article using same

Patent metadata

Field	Value
Publication number	US-11124647-B2
Application number	US-201916456376-A
Country	US
Kind code	B2
Filing date	Jun 28, 2019
Priority date	Dec 30, 2016
Publication date	Sep 21, 2021
Grant date	Sep 21, 2021

Abstract

Provided are a thermoplastic resin composition including 100 parts by weight of a base resin including (A-1) a polycarbonate resin, (A-2-1) a first acrylonitrile-butadiene-styrene graft copolymer including a rubber polymer having an average particle diameter of 200 nm to 400 nm and an acrylonitrile-butadiene-styrene copolymer comprising (A-2-2) a second acrylonitrile-butadiene-styrene graft copolymer including a rubber polymer having an average particle diameter of 400 nm to 600 nm, and (A-3) an aromatic vinyl compound-vinyl cyanide compound copolymer; (B) 1 to 10 parts by weight of a crosslinked styrene-acrylonitrile copolymer; and (C) 5 to 15 parts by weight of a flame retardant, and a molded article using the same.

First claim

The invention claimed is:

1. A thermoplastic resin composition, comprising
100 parts by weight of a base resin comprising
(A-1) a polycarbonate resin,
(A-2-1) a first acrylonitrile-butadiene-styrene graft copolymer including a rubber polymer having an average particle diameter of 200 nm to 400 nm and
(A-2-2) an acrylonitrile-butadiene-styrene copolymer comprising a second acrylonitrile-butadiene-styrene graft copolymer including a butadiene rubbery polymer having an average particle diameter of 400 nm to 600 nm, wherein the (A-2-2) acrylonitrile-butadiene-styrene copolymer comprises 10 wt % to 25 wt % of the butadiene rubbery polymer based on 100 wt % of the (A-2-2) acrylonitrile-butadiene-styrene copolymer, and
(A-3) an aromatic vinyl compound-vinyl cyanide compound copolymer resin;
(B) 1 to 10 parts by weight of a crosslinked styrene-acrylonitrile copolymer; and
(C) 5 to 15 parts by weight of a flame retardant.

2. The thermoplastic resin composition of claim 1 , comprising:
55 to 75 wt % of the (A-1) polycarbonate resin,
10 to 15 wt % of the (A-2-1) first acrylonitrile-butadiene-styrene graft copolymer including a rubber polymer having an average particle diameter of 200 nm to 400 nm,
10 to 18 wt % of the (A-2-2) acrylonitrile-butadiene-styrene copolymer comprising the second acrylonitrile-butadiene-styrene graft copolymer including a butadiene rubber polymer having an average particle diameter of 400 nm to 600 nm, and
10 wt % or less of the (A-3) aromatic vinyl compound-vinyl cyanide compound copolymer resin
based on 100 wt % of the (A) base resin.

3. The thermoplastic resin composition of claim 1 , wherein each of the first acrylonitrile-butadiene-styrene graft copolymer and the second acrylonitrile-butadiene-styrene graft copolymer have a core-shell structure.

4. The thermoplastic resin composition of claim 3 , wherein the core consists of butadiene and the shell consists of a copolymer of acrylonitrile and styrene.

5. The thermoplastic resin composition of claim 1 , wherein
the (A-3) aromatic vinyl compound-vinyl cyanide compound copolymer has a weight average molecular weight of 320,000 g/mol to 420,000 g/mol.

6. The thermoplastic resin composition of claim 1 , wherein
in the (A-3) aromatic vinyl compound-vinyl cyanide compound copolymer,
the aromatic vinyl compound is selected from the group consisting of styrene, styrene substituted with a halogen, styrene substituted with a C1 to C10 alkyl group, α-methyl styrene, and combinations thereof.

7. The thermoplastic resin composition of claim 1 , wherein
in the (A-3) aromatic vinyl compound-vinyl cyanide compound copolymer,
the vinyl cyanide compound is selected from the group consisting of acrylonitrile, methacrylonitrile, fumaronitrile, and combinations thereof.

8. The thermoplastic resin composition of claim 1 , wherein the (A-3) aromatic vinyl compound-vinyl cyanide compound copolymer is a styrene-acrylonitrile copolymer (SAN).

9. The thermoplastic resin composition of claim 1 , wherein the (B) crosslinked styrene-acrylonitrile copolymer has a weight average molecular weight of 3,000,000 g/mol to 7,000,000 g/mol.

10. The thermoplastic resin composition of claim 1 , wherein the (C) flame retardant is selected from the group consisting of phosphate compounds, phosphite compounds, phosphonate compounds, polysiloxanes, phosphazene compounds, phosphinate compounds, melamine compounds, and combinations thereof.

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

Assignees

• Lotte Advanced Mat Co Ltd

Inventors

• Kim Myunghun
• Kwon Keehae
• Park Jungeun

Classifications

• C08L2201/02

  Flame or fire retardant/resistant · CPC title

• C08L25/12

  with unsaturated nitriles · CPC title

• C08L55/02

  ABS [Acrylonitrile-Butadiene-Styrene] polymers · CPC title

• C08L2205/035

  containing four or more polymers in a blend · CPC title

• C08L51/04

  grafted on to rubbers · CPC title