Patent ID: 6544325
Filing Date: 2003-04-08
Classification: C09B

Abstract:
A pigment dispersion comprising a pigment, from 2 to 20% by weight of a rheology improver and from 10 to 400% by weight of a high molecular mass organic material, each based on the total amount of pigment, in whichthe pigment is a solid solution whose host pigment is unsubstituted copper phthalocyanine and whose guest pigment is a quinacridone, quinacridonequinone, dioxazine, indanthrone, indigo, isoviolanthrone, perylene, amino-substituted 1,4-diketo-2,5-diarylpyrrolo[3,4c]pyrrole- or alkoxy-substituted Naphtol AS azo pigment, the amount of guest pigment being from 0.1 to 50% by weight, based on the amount of copper phthalocyanine; and the rheology improver is selected from the group consisting of quinacridone, dihydroquinacridone, quinacridonequinone, 1,1â€²-dianthraquinonyl, dioxazine, indanthrone, indigo, isoindolinone, isoviolanthrone, phthalocyanine, 1,4-diketopyrrolo[3,4c]pyrrole cores substituted by groups containing nitrogen or sulfur and mixtures thereof.