Patent ID: 8182598
Filing Date: 2012-05-22
Classification: C09B,C09D,G03F,G03G

Abstract:
1. A method of coloring a color filtercomprising the step of adding a colorant to the color filter during the production thereof, wherein the colorant includes a pigment preparation comprising a) a dioxazine compound of the formula (I) as base pigment and b) a dioxazine compound of the formula (II) as pigment dispersant wherein Q is an m-valent radical of the base pigment of the formula (I), Y is a bridging moiety from the series —(CR X is the radical of an aliphatic or aromatic, five-, six- or seven-membered heterocyclic system attached to the bridging member Y via a C atom and has in each case 1 to 3 identical or different ring heteroatoms selected from the group consisting of nitrogen, oxygen and sulfur and, optionally, also has a benzo-fused ring optionally substituted by C or is a phthalimido radical attached to the bridging member Y via the imide nitrogen and and is optionally substituted up to a maximum of four times on the benzoid ring by chloro, bromo, nitro, carboxyl, N—(C or is a radical —NR or in which the group —NR m indicates a numerical value between 1 and 4 wherein the pigment dispersant is a compound of the formula (III)