Thermoplastic resin composition and molded article employing same

Patent metadata

Field	Value
Publication number	US-2017292017-A1
Application number	US-201515508042-A
Country	US
Kind code	A1
Filing date	Nov 26, 2015
Priority date	Dec 4, 2014
Publication date	Oct 12, 2017
Grant date	—

Abstract

The present invention relates to a styrene-based thermoplastic resin composition with improved flowability and, more specifically, a thermoplastic resin composition, which retains heat resistance and improved flowability by introducing a low-molecular weight styrene-acrylonitrile (SAN) resin into an acrylonitrile-butadiene-styrene (ABS) resin, which has enhanced heat resistance through the addition of a heat-resistant resin, and to a molded article into which the composition is molded. According to the resin composition, there can be obtained: a thermal resin composition, which has an improvement in the flowability of the heat-resistant ABS resin and retains non-deteriorating or favorable heat resistance and impact resistance; and a molded article.

First claim

1 . A thermoplastic resin composition with improved flowability comprising
a heat-resistant acrylonitrile-butadiene-styrene (ABS) resin; and a styrene-acrylonitrile (SAN) resin having a weight average molecular weight (Mw) of 10,000 to 70,000.

2 . The thermoplastic resin composition with improved flowability according to claim 1 , characterized in that said thermoplastic resin composition comprises 0.5 to 10 parts by weight of the styrene-acrylonitrile resin having a weight average molecular weight (Mw) of 10,000 to 70,000, relative to 100 parts by weight of the heat-resistant acrylonitrile-butadiene-styrene resin.

3 . The thermoplastic resin composition with improved flowability according to claim 1 , characterized in that said heat-resistant acrylonitrile-butadiene-styrene resin comprises a copolymer wherein acrylonitrile and styrene are grafted to a butadiene rubbery polymer, and at least one selected from the group consisting of a-methylstyrene (AMS)-based heat-resistant resin, N-phenylmaleimide (PMI)-based heat-resistant resin and a combination thereof.

4 . The thermoplastic resin composition with improved flowability according to claim 1 , characterized in that said heat-resistant acrylonitrile-butadiene-styrene resin further comprises a styrene-acrylonitrile resin having a weight average molecular weight of 100,000 to 180,000.

5 . The thermoplastic resin composition with improved flowability according to claim 3 , characterized in that said heat-resistant acrylonitrile-butadiene-styrene resin comprises
a) 15 to 40% by weight of an acrylonitrile-butadiene-styrene graft copolymer; b-1) 20 to 85% by weight of an a -methylstyrene-based heat-resistant resin; and c) 0 to 65% by weight of a styrene-acrylonitrile resin having a weight average molecular weight of 100,000 to 180,000.

6 . The thermoplastic resin composition with improved flowability according to claim 3 , characterized in that said heat-resistant acrylonitrile-butadiene-styrene resin comprises
a) 15 to 40% by weight of an acrylonitrile-butadiene-styrene graft copolymer; b-2) 5 to 40% by weight of an N-phenylmaleimide-based heat-resistant resin; and c) 20 to 80% by weight of a styrene-acrylonitrile resin with a weight average molecular weight (Mw) of 100,000 to 180,000.

7 . The thermoplastic resin composition with improved flowability according to claim 3 , characterized in that said heat-resistant acrylonitrile-butadiene-styrene resin comprises
a) 15 to 40% by weight of an acrylonitrile-butadiene-styrene graft copolymer; b-1) 20 to 80% by weight of an α-methylstyrene-based heat-resistant resin; b-2) 5 to 40% by weight of an N-phenylmaleimide-based heat-resistant resin; and c) 0 to 60% by weight of a styrene-acrylonitrile resin having a weight average molecular weight of 100,000 to 180,000.

8 . A molded article molding the thermoplastic resin composition of claim 1 .

9 . The thermoplastic resin composition with improved flowability according to claim 4 , characterized in that said heat-resistant acrylonitrile-butadiene-styrene resin comprises
a) 15 to 40% by weight of an acrylonitrile-butadiene-styrene graft copolymer; b-1) 20 to 85% by weight of an a -methylstyrene-based heat-resistant resin; and c) 0 to 65% by weight of a styrene-acrylonitrile resin having a weight average molecular weight of 100,000 to 180,000.

10 . The thermoplastic resin composition with improved flowability according to claim 4 , characterized in that said heat-resistant acrylonitrile-butadiene-styrene resin comprises
a) 15 to 40% by weight of an acrylonitrile-butadiene-styrene graft copolymer; b-2) 5 to 40% by weight of an N-phenylmaleimide-based heat-resistant resin; and c) 20 to 80% by weight of a styrene-acrylonitrile resin with a weight average molecular weight (Mw) of 100,000 to 180,000.

11 . The thermoplastic resin composition with improved flowability according to claim 4 , characterized in that said heat-resistant acrylonitrile-butadiene-styrene resin comprises
a) 15 to 40% by weight of an acrylonitrile-butadiene-styrene graft copolymer; b-1) 20 to 80% by weight of an a -methylstyrene-based heat-resistant resin; b-2) 5 to 40% by weight of an N-phenylmaleimide-based heat-resistant resin; and c) 0 to 60% by weight of a styrene-acrylonitrile resin having a weight average molecular weight of 100,000 to 180,000.

Assignees

• Lg Chemical Ltd

Inventors

• Jung Dae San
• Han Seung Hun
• Kim Seong Lyong
• Joo Hyun Ho
• Lee Ju Hyeong
• Lee Soo Kyeong

Classifications

• C08L2205/03

  containing three or more polymers in a blend · CPC title

• C08L35/00

  Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical, and containing at least one other carboxyl radical in the molecule, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers · CPC title

• C08L55/02 Primary

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

• C08L2205/035

  containing four or more polymers in a blend · CPC title

• C08L2207/04

  Thermoplastic elastomer · CPC title