Abstract: The invention relates to a method for producing chromophore and/or effect giving multilayer lacquers according to the wet-on-wet method. A water base lacquer is applied which contains at least one graft copolymer containing (A) at least one (meth)acrylate copolymer and (B) at least one polyurethane. The graft copolymer can be produced by (1) dispersing at least one hydrophilic or hydrophobic self cross-linking polyurethane (B) with a statistical average of at least one terminal and/or at least one lateral olefinically unsaturated group and at least one blocked isocyanate group per molecule in an aqueous medium. (2) A mixture of a at least one monomer (a1) with at least one isocyanate reactive functional group at last one monomer (a2) that can be copolymerised therewith is subsequently radically copolymerised in an emulsion in the presence of the polyurethane (B) or the polyurethanes (B). A powder slurry transparent lacquer layer is added to the resulting base lacquer layer.

Abstract: The invention relates to a method for producing chromophore and/or effect giving multilayer lacquers according to the wet-on-wet method. A water base lacquer is applied which contains at least one graft copolymer containing (A) at least one (meth)acrylate copolymer and (B) at least one polyurethane. The graft copolymer can be produced by (1) dispersing at least one hydrophilic or hydrophobic self cross-linking polyurethane (B) with a statistical average of at least one terminal and/or at least one lateral olefinically unsaturated group and at least one blocked isocyanate group per molecule in an aqueous medium. (2) A mixture of a at least one monomer (a1) with at least one isocyanate reactive functional group at last one monomer (a2) that can be copolymerized therewith is subsequently radically copolymerized in an emulsion in the presence of the polyurethane (B) or the polyurethanes (B). A powder slurry transparent lacquer layer is added to the resulting base lacquer layer.

Abstract: A polyurethane comprising lateral and/or terminal ethenylarylene groups produced by reacting a polyurethane prepolymer containing free isocyanate groups with an adduct obtained by reacting an ethenylarylene monoisocyanate with a polyol, polyamine, and/or a compound containing hydroxyl and amino groups in a molar ratio of 1:1. Also, a graft copolymer comprising a hydrophobic core comprising at least one monomer and a hydrophilic shell comprising the polyurethane, or a hydrophobic core comprising the polyurethane and a hydrophilic shell that comprises at least one monomer. Also, a graft copolymer comprising a hydrophobic core comprising at least one monomer and a hydrophilic shell comprising a polyurethane produced by dispersing at least one hydrophilic olefinic unsaturated polyurethane comprising lateral, and optionally terminal, ethenylarylene groups in an aqueous medium and copolymerizing at least one hydrophobic monomer in the polyurethane in emulsion.

Abstract: The invention embraces basecoating compositions comprising as binder constituents (i) an acrylate dispersion having a content of from 30 to 60% by weight of C1-C8-alkyl (meth)acrylate-containing monomers, from 30 to 60% by weight of vinylaromatic monomers and from 0.5 to 10% by weight of (meth)acrylic acid in the polymer, and (ii) a dispersion of a polymer which is obtainable by subjecting an ethylenically unsaturated monomer or a mixture of ethylenically unsaturated monomers to free-radical polymerization in the presence of a water-insoluble initiator or of a mixture of water-insoluble initiators and in an aqueous dispersion of a polyurethane resin which has a number-average molecular weight Mn of from 1000 to 30,000 daltons and comprises on average from 0.05 to 1.

Abstract: Self crosslinking polyurethane comprising lateral or terminal ethenylarylene groups, produced by reacting a polyurethane pre-polymer with an adduct, obtained by reacting an ethenylarylene mono-isocyanate with a compound containing hydroxyl groups or amino groups such that at least one group that is reactive to isocyanate remains in the adduct. Also, a self crosslinking graft copolymer containing at least one (meth)acrylate copolymer and at least one polyurethane produced by dispersing at least one self crosslinking olefinically unsaturated polyurethane comprising lateral or terminal ethenylarylene groups and blocked isocyanate groups in an aqueous medium and by radical copolymerization of a mixture of a monomer comprising at least one functional group that is reactive to isocyanate with a monomer that can be copolymerised with the mixture.