Abstract: The present invention provides a process for producing beta-form pigmentary copper phthalocyanine comprising a) producing crude copper phthalocyanine by charging phthalic anhydride or phthalimide, urea, a copper compound and a catalyst, at a substantially continuous and uniform rate, into a reaction chamber containing dry, granular, pre-formed copper phthalocyanine, and removing the reaction product from the reaction chamber; and b) convening the crude copper phthalocyanine produced in step a) into pigmentary form, by milling it either in the dry state or in an aqueous medium; mixing the milled material with an aqueous emulsion comprising i) a liquid C.sub.6 -C.sub.20 amine which is insoluble in water or alkali but is soluble in acid and ii) a surfactant capable of emulsifying the liquid amine; rendering the resulting mixture acidic to thereby dissolve the amine; and finally separating the desired pigmentary copper phthalocyanine from the treatment mixture.

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 Iin 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.