Patent ID: 8383749

Claim:
A pigment formulation comprising (i) at least one organic pigment, at least one inorganic pigment or a mixture thereof, (ii) a dispersant obtained by polymerization of monomers [A], [B], [C] and [D], wherein [A] is a monomer of the formula (I) wherein A is a C 2 - to C 4 -alkylene and B is a C 2 - to C 4 -alkylene other than A, R is hydrogen or methyl, m is from 1 to 500; n is from 1 to 500, subject to the proviso that the sum of m+n equals 2 to 1000; [B] is a monomer of the formula (II) wherein D is a C 3 -alkylene and R is hydrogen or methyl, o is from 2 to 500; [C] is an ethylenically unsaturated monomer containing an aromatic group; and [D] is an ethylenically unsaturated monomer containing an alkyl radical wherein monomer [C] is a compound of the formula (IIIa) or (IIIb): wherein X a is an aromatic or araliphatic radical having 3 to 30 carbon atoms, optionally containing heteroatoms selected from the group consisting of N, O and S, Z a is H or (C 1 -C 4 )-alkyl, Z b is H or (C 1 -C 4 )-alkyl, and Z c is H or (C 1 -C 4 )-alkyl; wherein R 1 is hydrogen or methyl, X b is an aromatic or araliphatic radical having 3 to 30 carbon atoms, optionally containing heteroatoms selected from the group consisting of N, O and S, W a is an oxygen or an NH group and wherein monomer [D] is a compound of the formula (IV): 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 heteroatoms selected from the group consisting of O, N and S, and optionally is unsaturated, W b is oxygen or an NH group.