Patent ID: 7393396
Filing Date: 2008-07-01
Classification: C08K,C09B,C09D

Abstract:
1. A process for coloring pastes, inks, paints, coverings, coatings or coating materials comprising: providing an aqueous pigment paste including water, at least one pigment and a synergistic combination of dispersants including: a). a primary dispersant; and b). a secondary dispersant including at least one ionic liquid composed of at least one cation of the general formulae (1) to (4): in which R 1 ,R 2 ,R 3 ,R 4 are identical or different and are hydrogen, a linear or branched aliphatic hydrocarbon radical with or without double bonds and having 1 to 30 carbon atoms, a cycloaliphatic hydrocarbon radical with or without double bonds and having 5 to 40 carbon atoms, an aromatic hydrocarbon radical having 6 to 40 carbon atoms, an alkylaryl radical having 7 to 40 carbon atoms, a linear or branched aliphatic hydrocarbon radical with or without double bonds interrupted by one or more heteroatoms and having 2 to 30 carbon atoms, a linear or branched aliphatic hydrocarbon radical with or without double bonds interrupted by one or more functionalities selected from the group consisting of —O—C(O)—, —(O)C—O—, —NH—C(O)—, —(O)C—NH, —(CH 3 )N—C(O)—, —(O)C—N(CH 3 )—, —S(O 2 )—O—,—O—S(O 2 )—, —S(O 2 )—NH—, —NH—S(O 2 )—, —S(O 2 )—N(CH 3 )—, and —N(CH 3 )—S(O 2 )— and having 2 to 30 carbon atoms, a linear or branched, aliphatic or cycloaliphatic hydrocarbon radical with or without double bonds which is terminally functionalized by OH, OR′, NH 2 , N(H)R′, or N(R′) 2 , where R′ is a C 1 - to C 30 -alkyl radical with or without double bonds and has 1 to 30 carbon atoms, or a polyether —(R 5 —O) n —R 6 of blockwise or random construction, where R n is 1 to 100, and R R