Stabilized phthalocyanine pigment compositions

Abstract

A heat-stable, pigmented thermoplastic resin composition comprising A) a thermoplastic resin; B) a metal phthalocyanine pigment; and C) 0.5 to 30% by weight of, based on the weight of component B), as agent for imparting heat stability to component B), a phthalocyanine compound having the formula (I): MPc(CH.sub.2 NHCO--A).sub.y I in which Pc is a phthalocyanine residue which is optionally substituted by up to an average of 1 chlorine or bromine atom, or of 1 sulphonic acid group; M is hydrogen or a metal capable of forming a metal phthalocyanine; y is a number ranging from 0.1 to 4.0; and A is C.sub.1 -C.sub.21 alkyl, C.sub.2 -C.sub.21 alkenyl, C.sub.5 -C.sub.8 cycloalkyl, C.sub.7 -C.sub.11 aralkyl, C.sub.6 - or C.sub.10 aryl, or a 5- or 6-membered heterocyclic residue, or a fused heterocyclic system.

Dependencies are inferred from the claim text.