Thermoplastic resin composition and molded product using same

Patent metadata

Field	Value
Publication number	US-11180652-B2
Application number	US-201816957847-A
Country	US
Kind code	B2
Filing date	Nov 2, 2018
Priority date	Dec 29, 2017
Publication date	Nov 23, 2021
Grant date	Nov 23, 2021

Abstract

The present invention relates to a thermoplastic resin composition comprising (A) 60 wt % to 75 wt % of a polycarbonate resin, (B) 5 wt % to 20 wt % of a polybutylene terephthalate resin, (C) 2 wt % to 8 wt % of a polyethylene terephthalate resin, (D) 1 wt % to 5 wt % of a methyl methacrylate-styrene-acrylonitrile copolymer, (E) 3 wt % to 8 wt % of an acrylonitrile-butadiene-styrene graft copolymer including a rubbery polymer having an average particle diameter of 200 nm to 400 nm, and (F) 5 wt % to 10 wt % of an acrylonitrile-butadiene-styrene copolymer including a rubbery polymer having an average particle diameter of 400 nm to 600 nm, and to a molded product using the same.

First claim

The invention claimed is:

1. A thermoplastic resin composition, comprising:
(A) 60 wt % to 75 wt % of a polycarbonate resin;
(B) 5 wt % to 20 wt % of a polybutylene terephthalate resin;
(C) 2 wt % to 8 wt % of a polyethylene terephthalate resin;
(D) 1 wt % to 5 wt % of a methyl methacrylate-styrene-acrylonitrile copolymer;
(E) 3 wt % to 8 wt % of an acrylonitrile-butadiene-styrene graft copolymer comprising a rubbery polymer having an average particle diameter of 200 nm to 400 nm; and
(F) 5 wt % to 10 wt % of an acrylonitrile-butadiene-styrene copolymer comprising a rubbery polymer having an average particle diameter of 400 nm to 600 nm.

2. The thermoplastic resin composition of claim 1 ,
wherein the acrylonitrile-butadiene-styrene graft copolymer (E) has a core-shell structure comprising
a core composed of a butadiene-based rubbery polymer, and
a shell composed by graft polymerization of acrylonitrile and styrene on the core.

3. The thermoplastic resin composition of claim 2 , wherein the core is included in an amount of 40 to 50 parts by weight based on 100 parts by weight of the acrylonitrile-butadiene-styrene graft copolymer (E).

4. The thermoplastic resin composition of claim 2 , wherein the styrene is included in an amount of 60 to 80 parts by weight and the acrylonitrile is included in an amount of 20 to 40 parts by weight based on 100 parts by weight of the shell of the acrylonitrile-butadiene-styrene graft copolymer (E).

5. The thermoplastic resin composition of claim 1 , wherein the acrylonitrile-butadiene-styrene copolymer (F) comprises
a dispersed phase of a core-shell structure comprising
a core composed of a butadiene-based rubbery polymer, and a shell composed by graft polymerization of acrylonitrile and styrene on the core, and
a styrene-acrylonitrile copolymer continuous phase.

6. The thermoplastic resin composition of claim 5 , wherein the core is included in an amount of 10 to 15 parts by weight based on 100 parts by weight of the acrylonitrile-butadiene-styrene copolymer (F).

7. The thermoplastic resin composition of claim 1 , wherein a weight ratio of the acrylonitrile-butadiene-styrene graft copolymer (E) and the acrylonitrile-butadiene-styrene copolymer (F) is 1:1 to 1:2.

8. The thermoplastic resin composition of claim 1 , wherein the methyl methacrylate-styrene-acrylonitrile copolymer (D) is a copolymer of a monomer mixture comprising 60 wt % to 80 wt % of methyl methacrylate, 10 wt % to 30 wt % of styrene, and greater than 0 wt % and less than or equal to 10 wt % of acrylonitrile.

9. The thermoplastic resin composition of claim 1 , wherein the methyl methacrylate-styrene-acrylonitrile copolymer (D) has a weight average molecular weight of 50,000 g/mol to 200,000 g/mol.

10. A molded product using a thermoplastic resin composition of claim 1 .

Assignees

• Lotte Chemical Corp

Inventors

• Kim Myunghun
• Kwon Keehae
• Park Jungeun

Classifications

• C08L69/00 Primary

  Compositions of polycarbonates; Compositions of derivatives of polycarbonates · CPC title

• C08L25/12

  with unsaturated nitriles · CPC title

• C08L2207/53

  Core-shell polymer · CPC title

• C08L33/12

  Homopolymers or copolymers of methyl methacrylate · CPC title

• C08L67/02

  Polyesters derived from dicarboxylic acids and dihydroxy compounds (C08L67/06 takes precedence) · CPC title