Patent ID: 8221537

Claim:
An aqueous pigment preparation comprising (A) at least one organic, inorganic pigment, or a mixture 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 are 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-O) m is propylene oxide units and (B-O) n is ethylene oxide units, or (A-O) m is ethylene oxide units and (B-O) n is propylene oxide units, and the molar fraction of ethylene oxide units is in the range from 50 to 98%, based on the sum total of ethylene oxide and propylene oxide units, the alkylene oxide units (A-O) m and (B-O) n are arranged in blocks, 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; XA 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, ZA is H or (C 1 -C 4 )-alkyl, ZB is H or (C 1 -C 4 )-alkyl, ZC is H or (C 1 -C 4 )-alkyl; R 1 is hydrogen or methyl, XB 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, WA is oxygen or an NH group, R 2 is hydrogen or methyl, Y is an aliphatic hydrocarbyl radical having 1 to 30 carbon atoms, which are linear, branched or cyclic, optionally containing hetero atoms O, N, S or a combination thereof and, optionally, may be unsaturated, WB is oxygen or an NH group; Q is SO 3 , CH 2 COO; or QM is: wherein M is H, a monovalent metal cation, a divalent metal cation, NH 4 + , a secondary, tertiary or quaternary ammonium ion, or a combination thereof, or is the equivalent of di-, tri- or polyvalent metal ions; (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, (G) water; and wherein the asterisk in the formula QM represents a free valency and indicates the linkage to the group (B-O) n .