Patent ID: 7905955

Claim:
An aqueous pigment preparation comprising (A) at least one organic pigment, inorganic pigment or a combination thereof, (B) a dispersant of formula (I) or (II) or mixtures of dispersants of formulae (I) and (II), wherein the indices a, b and c indicate the molar fraction of the respective monomers a=0.01-0.8 b=0.001-0.8 c=0.001-0.8 provided the sum total of a+b+c is 1, and A is C 2 -C 4 -alkylene, B is a C 2 -C 4 -alkylene other than A, R is hydrogen or methyl, m is from 1 to 500; n is from 1 to 500; provided the sum total of m+n is from 2 to 1000; X 1 is an aromatic or araliphatic radical having 3 to 30 carbon atoms optionally containing one or more of the hetero atoms N, O and S, Z 1 is H or (C 1 -C 4 )-alkyl, Z 2 is H or (C 1 -C 4 )-alkyl, Z 3 is H or (C 1 -C 4 )-alkyl; R 1 is hydrogen or methyl, X 2 is an aromatic or araliphatic radical having 3 to 30 carbon atoms optionally containing one or more of the heteroatoms N, O and S, W 1 is oxygen or an NH group, R 2 is hydrogen or methyl, Y is an aliphatic hydrocarbyl radical having 1 to 30 carbon atoms, optionally linear, branched or cyclic, and optionally contains hetero atoms O, N S or a combination thereof and optionally is unsaturated, W 2 is oxygen or an NH group; (C) optionally wetters, (D) optionally further surfactants, dispersants or a combination thereof, (E) optionally one or more organic solvents, one or more hydrotropic substances or a combination thereof, (F) optionally further additive materials customary for preparing aqueous pigment dispersions, and (G) water.