Thermoplastic Resin Composition and Molded Parts Using the Same

Patent metadata

Field	Value
Publication number	US-2016319128-A1
Application number	US-201615140630-A
Country	US
Kind code	A1
Filing date	Apr 28, 2016
Priority date	Apr 30, 2015
Publication date	Nov 3, 2016
Grant date	—

Abstract

A polycarbonate resin composition and a molded article for automotive parts manufactured using the same. The thermoplastic resin composition includes: (A) a polycarbonate resin; (B) a rubber-modified vinyl graft copolymer comprising (B-1) a first rubber-modified vinyl graft copolymer comprising a rubber polymer having an average particle diameter of about 230 nm to about 380 nm and (B-2) a second rubber-modified vinyl graft copolymer comprising a rubber polymer having an average particle diameter of about 60 nm to about 200 nm; (C) an aromatic vinyl-vinyl cyanide copolymer; and (D) a (meth)acrylic copolymer. The thermoplastic resin composition can have excellent properties in terms of heat stability and gloss.

First claim

What is claimed is:

1 . A thermoplastic resin composition comprising:
(A) a polycarbonate resin; (B) a rubber-modified vinyl graft copolymer comprising (B-1) a first rubber-modified vinyl graft copolymer comprising a rubber polymer having an average particle diameter of about 230 nm to about 380 nm and (B-2) a second rubber-modified vinyl graft copolymer comprising a rubber polymer having an average particle diameter of about 60 nm to about 200 nm; (C) an aromatic vinyl-vinyl cyanide copolymer; and (D) a (meth)acrylic copolymer.

2 . The thermoplastic resin composition according to claim 1 , comprising:
about 65 wt % to about 85 wt % of the polycarbonate resin (A); about 2 wt % to about 15 wt % of the rubber-modified vinyl graft copolymer (B); about 2 wt % to about 25 wt % of the aromatic vinyl-vinyl cyanide copolymer (C); and about 5 wt % to about 30 wt % of the (meth)acrylic copolymer (D), each based on the total weight of the polycarbonate resin (A), the rubber-modified vinyl graft copolymer (B), the aromatic vinyl-vinyl cyanide copolymer (C), and the (meth)acrylic copolymer (D).

3 . The thermoplastic resin composition according to claim 1 , wherein the rubber-modified vinyl graft copolymer (B) comprises the first rubber-modified vinyl graft copolymer (B-1) and the second rubber-modified vinyl graft copolymer (B-2) in a weight ratio of about 1:0.25 to about 1:4.

4 . The thermoplastic resin composition according to claim 1 , wherein the rubber-modified vinyl graft copolymer (B) comprises an acrylonitrile-butadiene-styrene graft copolymer (g-ABS).

5 . The thermoplastic resin composition according to claim 1 , wherein the aromatic vinyl-vinyl cyanide copolymer (C) comprises a styrene-acrylonitrile copolymer.

6 . The thermoplastic resin composition according to claim 1 , wherein the (meth)acrylic copolymer (D) comprises a methyl methacrylate copolymer.

7 . The thermoplastic resin composition according to claim 1 , wherein the (meth)acrylic copolymer (D) comprises a methyl methacrylate-styrene-acrylonitrile copolymer (MSAN).

8 . The thermoplastic resin composition according to claim 7 , wherein a weight ratio of the aromatic vinyl-vinyl cyanide copolymer (C) to the methyl methacrylate-styrene-acrylonitrile copolymer (MSAN) ranges from about 1:0.25 to about 1:4.

9 . The thermoplastic resin composition according to claim 1 , wherein the (meth)acrylic copolymer (D) comprises a methyl methacrylate-acrylonitrile-butadiene-styrene graft copolymer (g-MABS).

10 . A molded article for automotive parts manufactured using the thermoplastic resin composition according to claim 1 .

11 . The molded article for automotive parts according to claim 10 , wherein the molded article has a volatile gas generation amount of about 900 ppm or less, as measured by a process in which 5 g of pellets prepared from the thermoplastic resin composition are placed in a petri dish, and the dish is covered with a glass panel and heated on a hot plate at 250° C. for 3 hours, followed by measuring the weight increase of the glass panel.

12 . The molded article for automotive parts according to claim 10 , wherein the molded article has a gloss of about 95 GU to about 110 GU as measured at a reflection angle of 20° and a gloss of about 90 GU to about 105 GU as measured at a reflection angle of 60° in accordance with ASTM D523.

13 . The molded article for automotive parts according to claim 10 , wherein, when the molded article comprises a black colorant, the molded article has a brightness (L) of less than about 29, as measured by the Commission Internationale de l'Eclairage (CIE) Lab color system.

Assignees

• Samsung Sdi Co Ltd

Inventors

• Park Jung Woo
• Kim Myung Hun
• Kwon Kee Hae
• Hong Chang Min

Classifications

• C08L69/00 Primary

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