Patent ID: 8293695
Filing Date: 2012-10-23
Classification: C11D

Abstract:
1. A composition comprising a mixture of a) at least one water-soluble phthalocyanine photocatalyst of formula 1(b) and b) at least one azo dyestuff and/or at least one triphenylmethane dyestuff, wherein (1b) is in which PC is the phthalocyanine ring system; Me is Zn; Fe(II); Ca; Mg; Na; K; Al-Z Z q is 0; 1 or 2; r is any number from 1 to 4; Q a branched alkoxy radical of the formula an alkylethyleneoxy unit of the formula an alkylethyleneoxy unit of the formula -(T B B M T X R Y R R R R M is hydrogen; or an alkali metal ion or ammonium ion, Z a is 0 or 1; b is from 0 to 6; c is from 0 to 100; d is 0; or 1; e is from 0 to 22; v is an integer from 2 to 12; w is 0 or 1; where the phthalocyanine ring system may also comprise further solubilising groups, wherein the at least one azo dyestuff of formula is sectected from the group consisting of wherein X and Y, independently of one another, are each hydrogen; C R Z is C n is 1 or 2 and m is 0, 1 or 2, as well as the corresponding salts thereof and mixtures thereof which composition produces a relative hue angle of 220-320 °, wherein the dyestuff component is degraded when the composition is exposed to sunlight and wherein the degradation rate of the azo dyestuff(s) and/or triphenylmethane dyestuff(s) is at least 1% per 2 hours.