Transparent, rubber-modified styrene copolymer

Details Transparent, rubber-modified styrene copolymer Transparent, rubber-modified styrene copolymer

2005-02-01

2005-02-01

Seidleck, James J. (Department: 1711)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C525S098000, C525S099000, C525S243000, C525S316000

Reexamination Certificate

active

06849690

ABSTRACT:
The present invention relates to a method of preparing rubber-modified styrene copolymer resin with excellent transparency and impact resistance, specifically to a method of preparing transparent resin of rubber-modified styrene copolymer comprising graft-copolymerizing styrene monomer and (meth)acrylate monomer in the presence of block or random styrene-butadiene copolymer which has 30-50% of styrene skeleton content and 20-40 cp of 5% toluene solution viscosity at 25iÉ. According to the method of the present invention, the transparent resin containing the rubber particles of a double structure comprising onion and core-shell structure can provide transparent resin of rubber-modified styrene copolymer resin with excellent transparency and impact resistance as well as good gloss.

REFERENCES:
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patent: 0 703 252 (1996-03-01), None
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patent: 7-330996 (1995-12-01), None
patent: 10-072512 (1998-03-01), None
International Search Report for International Application No. PCT/KR 01/02153; Mar. 14, 2002.
International Preliminary Examination Report for International Application No. PCT/KR 01/02153; Dec. 17, 2002.

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