METHOD FOR PREPARING RUBBER REINFORCED GRAFT COPOLYMER AND RUBBER REINFORCED GRAFT COPOLYMER PREPARED THEREBY

Title:

METHOD FOR PREPARING RUBBER REINFORCED GRAFT COPOLYMER AND RUBBER REINFORCED GRAFT COPOLYMER PREPARED THEREBY

Document Type and Number:

WIPO Patent Application WO/2015/046729

Kind Code:

A1

Abstract:

The present disclosure relates to a method for preparing a rubber reinforced graft copolymer and a rubber reinforced graft copolymer prepared thereby and, more specifically, to a method for preparing a rubber reinforced graft copolymer, in which i) 40 to 50 wt% of rubber latex having an average particle size of 0.25 to 0.45 ㎛ and a gel content of 80 to 95 wt%; ii) 10 to 20 wt% of rubber latex having an average particle size of 0.49 to 0.13 ㎛ and a gel content of 85 to 99 wt%; iii) 20 to 35 wt% of α-methyl styrene; and iv) 5 to 20 wt% of a vinyl cyanide monomer are emulsification-polymerized using polymerization water, an emulsifying agent, a molecular weight regulator, an initiator, and an activating agent, wherein the entire quantity of rubber latex of i) and ii) are fed in before polymerization initiation, and the vinyl cyanide monomer of iv) is not or only partially fed in before polymerization initiation, and then the remainder is fed after the polymerization initiation, and to a rubber reinforced graft copolymer prepared thereby. According to the present disclosure, provided are an α-methyl styrene based rubber reinforced graft copolymer capable of improving heat resistance as well as polymerizing productivity and a rubber reinforced graft copolymer prepared thereby.

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Inventors:

JUNG YU SUNG (KR)
CHAI JOO BYUNG (KR)
PARK EUN SEON (KR)
JEON TAE YOUNG (KR)
LEE JIN HO (KR)
KIM YOUNG MIN (KR)

Application Number:

PCT/KR2014/006615

Publication Date:

April 02, 2015

Filing Date:

July 21, 2014

Export Citation:

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Assignee:

LG CHEMICAL LTD (KR)

International Classes:

C08F279/02; C08F2/22; C08F279/04; C08L51/04

Foreign References:

KR20090020851A	2009-02-27
KR100653503B1	2006-12-04
KR20120021786A	2012-03-09
KR20110071663A	2011-06-29
KR930006082B1	1993-07-07

Attorney, Agent or Firm:

CHO, INJE (KR)
조인제 (KR)

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