Rubber-reinforced styrene resin composition and process for producing the same
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United States of America Patent
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Nov 12, 1996
Issued Date -
N/A
app pub date -
Jan 20, 1995
filing date -
Mar 18, 1991
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Abstract
A rubber-reinforced styrene resin composition consisting essentially of: (1) 2-30% by weight of a grafted rubbery polymer wherein less than 30 parts by weight of a polymer of at least an aromatic alkenyl compound and an alkenyl cyanide compound are grafted onto 100 parts by weight of a conjugated diene rubber (I) having a weight average particle size of 0.26-0.6 .mu.m and a gel content of 30-80% by weight; (2) 5-40% by weight of a grafted rubbery polymer wherein 30 parts by weight or more of a polymer of at least an aromatic alkenyl compound and an alkenyl cyanide are grafted onto 100 parts by weight of a conjugated diene rubber (II) having a weight average particle size of 0.26-0.6 .mu.m and a gel content of 30-80% by weight; and (3) 40-93% by weight of a styrene copolymer of a monomer component consisting of at least one aromatic alkenyl compound and an alkenyl cyanide compound, and the difference between grafting degree of the component (1) and the grafting degree of component (2) being 15% by weight or more.
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