Method for preparing graft copolymer of...

Details Method for preparing graft copolymer of... Method for preparing graft copolymer of...

2005-02-15

2005-02-15

Egwim, Kelechi C. (Department: 1713)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C523S201000, C524S458000, C525S242000, C525S902000, C526S328500, C526S329200, C526S329700

Reexamination Certificate

active

06855786

ABSTRACT:
The present invention relates to a method of preparing an impact-reinforcement agent for polyvinylchloride (PVC) resin having superior anti-stress whitening properties, and specifically to a method for preparing a graft copolymer of methyl-methacrylate-butadiene-styrene (MBS) comprising 3 steps of graft-copolymerizing monomers such as alkylmethacrylate, acrylate, and an ethylene-unsaturated aromatic compound to a rubber latex, in sequence.

REFERENCES:
patent: 4352910 (1982-10-01), Katto et al.
patent: 4431772 (1984-02-01), Katto et al.
patent: 4857592 (1989-08-01), Hoshino et al.
patent: 6331580 (2001-12-01), Molnar
patent: 54-133588 (1979-10-01), None
patent: 09-003142 (1997-01-01), None
patent: 09-296015 (1997-11-01), None

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