PHTHALOCYANINE DERIVATIVE AND PIGMENT COMPOSITION

摘要

PURPOSE:To improve the light stability of a blended pigment and the light stability of materials to be colored and retaining a pigment compsn. dispersed therein, by blending a phthalocyanine derivative represented by the specific formula with other pigment. CONSTITUTION:This phthalocyanine derivative is represented by formula 1, wherein Pc is an n-valent residue of phthalocyanine; X is a methylene, carbonyl or sulfonyl group; R1 and R2 are each H, an alkyl or allyl group provided that at least one of R1 and R2 is always a group other than H; n is 1-4. Pc is pref. a residue of copper phthalocyanine. A pigment compsn. consisting of said phthalocyanine derivative of formula I and at least one org. pigment and/or at least one inorg. pigment is formed. The amount of the phthalocyanine derivative to be blended is pref. at least 0.1%.