초록 ▼

Thermoplastic molding compositions are described which comprise a miscible admixture of (a) an aromatic polycarbonate resin, (b) an olefinic polymer or copolymer and a minor amount of (c) a third component which is an acrylic polymer. The presence of the acrylic polymer permits the incorporation of

Thermoplastic molding compositions are described which comprise a miscible admixture of (a) an aromatic polycarbonate resin, (b) an olefinic polymer or copolymer and a minor amount of (c) a third component which is an acrylic polymer. The presence of the acrylic polymer permits the incorporation of amounts of component (b) in excess of 10 parts by weight per 100 parts by weight of (a) and (b) together to improve the stress cracking resistance without normally attendant loss in ductility.

대표청구항 ▼

A thermoplastic composition, comprising an intimate blend of (a) a major proportion of an aromatic polycarbonate resin; (b) at least about 10.4 parts by weight of a polyolefin or an olefin copolymer resin per 100 parts by weight of (a) and (b) combined; and (c) a third polymeric component comprising

A thermoplastic composition, comprising an intimate blend of (a) a major proportion of an aromatic polycarbonate resin; (b) at least about 10.4 parts by weight of a polyolefin or an olefin copolymer resin per 100 parts by weight of (a) and (b) combined; and (c) a third polymeric component comprising (i) a polymerization product of acrylic comonomers, or an acrylic monomer with a diene rubber, alone, or including styrene or (ii) a multiphase interpolymer of a first elastomeric phase comprising an acrylic rubber and a rigid thermoplastic final phase, or (iii) a mixture of (i) and (ii), the amount of (c) being at least sufficient to impart to the blend a resistance to environmental stress cracking and crazing greater than that possessed by (a) and (b) together.