Abstract: Described herein is a coating composition, including (A) one or more carboxyl group containing poly(meth)acrylic polymers having an acid number in the range from 120 to 500 mg KOH/g, the acid number being calculated for the non-neutralized form of the one or more poly(meth)acrylic polymers, the one or more poly(meth)acrylic polymers optionally being at least partially neutralized; and (B) one or more compounds of formula (I) having on average at least 2 hydroxyl groups; where residues R1 are independently of each other (CH2)n with n=2, 3 or 4; residues R2 are independently of each other H or CH3; and residues R3 are independently of each other selected from H and (O?C)—R1—(C?O)—R4, where residues R4 are independently selected from OH, ORa, where Ra is a linear or branched alkyl group with 1 to 4 carbon atoms, and N(CR2CR2OH)2. Also described herein are methods of preparing and using same.

Abstract: Described herein is a curable coating composition including at least one Michael donor (A) having at least one acetoacetate group, at least one Michael acceptor (B) and at least one specific catalyst (C). Also described herein are a method of using the curable coating composition as a clear coating in a method to prepare a multilayer coating and a multilayer coating obtained from said process. Further described herein is a kit-of-parts including at least two separate containers C1 and C2, where the specific catalyst (C) and/or the at least one Michael acceptor (B) is contained in container C2. Additionally described herein is a method of using specific salts of carboxylic acids as catalyst in a reaction between a Michael donor (A) having at least one acetoacetate group and a Michael acceptor (B).

Abstract: Described herein are a curable coating composition including at least one Michael donor (A) having at least one thiol group, at least one Michael acceptor (B) and at least one specific catalyst (C), a method of using the curable coating composition as a clear coating in a process to prepare a multilayer coating and a multilayer coating obtained from said process. Also described herein is a kit-of-parts including at least two separate containers C1 and C2, where the specific catalyst (C) is contained in container C1 and/or C2. Finally, described herein is a method of using specific salts of carboxylic acids as catalyst in a reaction between a Michael donor (A) having at least one thiol group and a Michael acceptor (B).

Abstract: The present invention relates to an aqueous dispersion (P) of at least two polymeric resins (P1) and (P2) which are different from one another, (P1) being a copolymer obtainable by copolymerizing ethylenically unsaturated monomers in the presence of at least one polyurethane resin having polymerizable carbon double bonds, and (P2) being a polyester having functional hydroxyl groups, which has an acid number of <25 mg of KOH per g of polyester, and (P) being obtainable by a process encompassing at least four steps (1), (2), (3), and (4), to an aqueous coating composition comprising the aqueous dispersion (P), to a process for at least partly coating at least one substrate metal surface, coated with at least one primer coat, with a topcoat, using the aqueous coating composition, and to an at least partly coated substrate obtainable by such a process.

Abstract: The present invention relates to an aqueous dispersion (P) of at least two polymeric resins (P1) and (P2) which are different from one another, (P1) being a copolymer obtainable by copolymerizing ethylenically unsaturated monomers in the presence of at least one polyurethane resin having polymerizable carbon double bonds, and (P2) being a polyester having functional hydroxyl groups, which has an acid number of <25 mg of KOH per g of polyester, and (P) being obtainable by a process encompassing at least four steps (1), (2), (3), and (4), to an aqueous coating composition comprising the aqueous dispersion (P), to a process for at least partly coating at least one substrate metal surface, coated with at least one primer coat, with a topcoat, using the aqueous coating composition, and to an at least partly coated substrate obtainable by such a process.