US 10,689,473 B2 · Graft copolymer, method of preparing graft copolymer, thermoplastic resin composition including graft copolymer, and molded part including thermoplastic resin composition

Abstract

The present invention relates to a graft copolymer having excellent thermal stability, a method of preparing the graft copolymer, a thermoplastic resin composition including the graft copolymer, and a molded part including the thermoplastic resin composition. According to the present invention, since the thermoplastic resin composition of the present invention includes the graft copolymer having excellent thermal stability, the thermoplastic resin composition and the molded part manufactured using the thermoplastic resin composition have excellent physical properties, such as impact strength, fluidity, and transparency. Furthermore, the degree of discoloration that may occur when the resin composition or the molded part is allowed to stay in an injection molding machine or stay at a high temperature for a long period of time may be reduced.

Claims17

Dependent claims

A graft copolymer, comprising:

a conjugated diene rubber core;
and a shell surrounding the rubber core,
wherein the shell is obtained by graft-polymerizing a (meth)acrylic acid alkyl ester compound, an aromatic vinyl compound, and a vinyl cyanide compound,
wherein, when the graft polymerization is performed, a metal salt of sorbic acid is added in an amount of 0.1 to 0.49 parts by weight based on 100 parts by weight of a total composition of the conjugated diene rubber core and the shell,
wherein the shell has a weight average molecular weight of 80,000 to 300,000 g/mol.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

16/083,857Filed 2 Jan 2018

Priority

KR 10-2017-001078524 Jan 2017

Published

US 2019/0062484 A128 Feb 2019

Granted

23 Jun 2020

Term ends

Not estimatedThe source records don’t support an estimate.

Classification16 codes

C08F 279/02
Macromolecular compounds obtained by polymerising monomers on to polymers of monomers having two or more carbon-to-carbon double bonds as…
C08F 2/24
Emulsion polymerisation: with the aid of emulsifying agents
C08F 2/26
With the aid of emulsifying agents: anionic
C08F 2/38
Processes of polymerisation: polymerisation using regulators, e.g. chain terminating agents , e.g. telomerisation

Graft copolymer, method of preparing graft copolymer, thermoplastic resin composition including graft copolymer, and molded part including thermoplastic resin composition

Life of this patent

Graft copolymer, method of preparing graft copolymer, thermoplastic resin composition including graft copolymer, and molded part including thermoplastic resin composition

Life of this patent

Abstract

Claims17