초록 ▼

Novel copolymers and molding compositions are prepared from acyl halide derivatives of dicarboxylic acids, acyl halide derivatives of tricarboxylic aromatic anhydrides and aromatic diamines and about 1 to about 10 percent by weight of phthalic anhydride moieties. Also, glass filled copolymers are pr

Novel copolymers and molding compositions are prepared from acyl halide derivatives of dicarboxylic acids, acyl halide derivatives of tricarboxylic aromatic anhydrides and aromatic diamines and about 1 to about 10 percent by weight of phthalic anhydride moieties. Also, glass filled copolymers are prepared. The copolymers are useful as engineering plastics.

대표청구항 ▼

An injection moldable polyamide copolymer comprising about 1 to about 10 percent phthalic anhydride moieties and comprising recurring polyamide A units of [Figure] capable of undergoing imidization wherein →denotes isomerization and polyamide B units of [Figure] wherein the molar ratio of A units to

An injection moldable polyamide copolymer comprising about 1 to about 10 percent phthalic anhydride moieties and comprising recurring polyamide A units of [Figure] capable of undergoing imidization wherein →denotes isomerization and polyamide B units of [Figure] wherein the molar ratio of A units to B units is about 80 to 20 to 20 to 80, and wherein R is a divalent aromatic hydrocarbon radical of from 6 to about 20 carbon atoms or 2 divalent hydrocarbon radicals of from about 6 to 20 carbon atoms joined directly or by stable linkages selected from the group consisting of －O－, methylene, －CO－, －SO2－, and －S－radicals and X is a divalent aromatic radical.