Composition of a polycarbonate resin and a selectively hydrogenated copolymer of a vinyl aromatic compound and an olefinic elastomer
AssigneeGeneral Electric Company
InventorsJan Bussink, Johannes W. J. DeMunck, Petrus C. A. Marie van Abeelen
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Abstract
There are provided compositions having superior impact resistance and improved solvent resistance comprising (a) an aromatic polycarbonate resin and (b) a minor amount of a selectively hydrogenated elastomeric block copolymer. The use of component (b) also provides remarkable improvements in the melt flow characteristics, in resistance to brittle failure, and in the resistance to environmental stress crazing and cracking of the polycarbonate resin component (a).
Claims26
A thermoplastic composition having superior resistance to impact fracture in thick-walled molded articles and improved environmental solvent resistance comprising an intimate blend of:
- (a) an aromatic polycarbonate resin;
- and
- (b) up to 3.5 parts by weight, based on 100 parts by weight of components (a) and (b) combined, of a selectively hydrogenated linear copolymer of a vinyl aromatic compound (A).sub.n and (A.sup.1).sub.n and an olefinic elastomer (B), of the type A-B-A.sup.1, wherein n is an integer from 1 to 10.
A thermoplastic composition comprising an intimate blend of:
- (a) 97 parts by weight of poly-(2,2-diphenylpropane carbonate);
- and
- (b) 3 parts by weight of hydrogenated styrene-butadiene-styrene block copolymer.
A thermoplastic composition comprising an intimate blend of:
- (a) 95 parts by weight of poly-(2,2-diphenylpropane carbonate);
- (b) 3 parts by weight of hydrogenated styrene-butadiene-styrene block copolymer;
- and
- (c) titanium dioxide pigment.
A thermoplastic composition having superior resistance to impact fracture in thick-walled molded articles and improved environmental solvent resistance comprising an intimate blend of:
- (a) an aromatic polycarbonate resin;
- and
- (b) up to about 3.0 parts by weight, based on 100 parts by weight of components (a) and (b) combined, of a selectivity hydrogenated linear copolymer of a vinyl aromatic compound (A).sub.n and (A.sup.1).sub.n and an olefinic elastomer (B), of the type A-B-A.sup.1, wherein n is an integer from 1 to 10.
Dependencies are inferred from the claim text.