Patent ID: 7112628

Claim:
An aqueous electrophoretic lacquer capable of being deposited cataphoretically having a solids content of 30 to 70 wt. % comprising an aqueous dispersion A) comprising 40 to 85 wt. % of component a1) comprising at least one cationically modified polyurethane (meth)acrylate having terminal, ethylenically unsaturated (meth)acrylate double bonds and 15 to 60 wt. % of component a2) comprising at least one reactive thinner having at least two ethylenically unsaturated (meth)acrylic double bonds; wherein the polyurethane (meth)acrylate comprises a cationically modified urethane prepolymer having terminal NCO groups bonded via groups selected from the group consisting of urethane, urea, amide and ester groups to the terminal ethylenically unsaturated (meth)acrylic double bonds to form the polyurethane (methacrylate); and wherein the (meth)acrylic double bonds of the mixture of component a1) and component a2) correspond to a bromine number of 20 to 150 g bromine/100 g solids and wherein the urethane prepolymer is the reaction product of i) at least one isocyanate selected from the group consisting of aliphatic polyisocyanate, cycloaliphatic polyisocyanates, araliphatic polyisocyanates, aromatic polyisocyanates and any mixtures thereof, said polyisocyanates having a molecular weight of more than 174; ii) at least one polyhydroxyl compound with a number average molecular weight of Mn of 400 to 5000, iii) at least one compound having a group that is cationic by neutralization and two groups that are reactive with isocyanates, and iv) optionally, at least one polyhydroxyl compound having a number average molecular weight Mn of 60 to less than 400.