Patent ID: 8287638

Claim:
An aqueous effect pigment paste comprising (A) at least one effect pigment, wherein the pigment concentration in said aqueous effect pigment paste is 1.0 to 70 percent by weight, (B) an aqueous dispersion of at least one graft copolymer prepared by subjecting at least one monomer (a) in an aqueous dispersion of at least one polyurethane (B1) to free radical (co)polymerization, wherein the at least one polyurethane comprises at least one lateral and/or at least one terminal ethenylarylene group and the at least one polyurethane is prepared by reacting (1) at least one polyurethane prepolymer (B11) comprising at least one free isocyanate group with (2) at least one adduct (B12), prepared by reacting (2.1) at least one ethenylarylene mono-isocyanate (B121) with (2.2) at least one compound (B122), selected from the group consisting of polyols, polyamines and compounds containing at least one hydroxyl group and at least one amino group, wherein at least one isocyanate-reactive group is left in the adduct (B12), and (C) at least one surface-active compound selected from the group consisting of polyoxyalkylene derivatives of nondrying oils.