Abstract: A water-reducible mixture of (meth)acrylic copolymers having a hydroxyl number of from 40 mg/g to 250 mg/g, an acid number of from 15 mg/g to 80 mg/g, a weight average molar mass Mw from 9 kg/mol to 40 kg/mol and a glass transition temperature Tg from ?40° C. to 80° C., based on polymerised monomers comprising at least one alkyl ester A of an olefinically un-saturated carboxylic acid having from 1 to 8 carbon atoms in the alkyl group, at least one hydroxy functional alkyl ester B of an olefinically unsaturated carboxylic acid, at least one aliphatic compound C that has both hydroxy and carboxyl functionalities, or which is a lactone or a cyclic lactone, at least one vinyl monomer D which does not comprise a moiety derived from an olefinically unsaturated carboxylic acid, at least one olefinically unsaturated carboxylic acid E, a process for its preparation, and a method of use thereof in the preparation of paints.

Abstract: A water-reducible mixture of (meth)acrylic copolymers having a hydroxyl number of from 40 mg/g to 250 mg/g, an acid number of from 15 mg/g to 80 mg/g, a weight average molar mass Mw from 9 kg/mol to 40 kg/mol and a glass transition temperature Tg from ?40° C. to 80° C., based on polymerised monomers comprising at least one alkyl ester A of an olefinically un-saturated carboxylic acid having from 1 to 8 carbon atoms in the alkyl group, at least one hydroxy functional alkyl ester B of an olefinically unsaturated carboxylic acid, at least one aliphatic compound C that has both hydroxy and carboxyl functionalities, or which is a lactone or a cyclic lactone, at least one vinyl monomer D which does not comprise a moiety derived from an olefinically unsaturated carboxylic acid, at least one olefinically unsaturated carboxylic acid E, a process for its preparation, and a method of use thereof in the preparation of paints.

Abstract: Aqueous self-crosslinking copolymer dispersions ABC obtainable by free-radically initiated copolymerization in the first stage of a monomer mixture A comprising olefinically unsaturated monomers A1 having carbonyl groups, unsaturated carboxylic acids or monoesters of unsaturated dicarboxylic acids A2, monomers A3 selected from vinylaromatic compounds, n-butyl methacrylate and also alkyl esters of unsaturated carboxylic acids or dialkyl esters of unsaturated dicarboxylic acids, esters A4 selected from alkyl esters of unsaturated carboxylic acids of dialkyl esters of unsaturated dicarboxylic acids, and other free-radically polymerizable monomers A5, and subsequent addition of a second monomer mixture B and further polymerization in the second stage, the mixture B comprising olefinically unsaturated monomers B1 corresponding to A1, esters B2 corresponding to A4, and monomers B3 corresponding to A5, and subsequently adding compounds C having hydrazine or hydrazide groups.

Abstract: Aqueous self-crosslinking copolymer dispersions ABC obtainable by free-radically initiated copolymerization in the first stage of a monomer mixture A comprising olefinically unsaturated monomers A1 having carbonyl groups, unsaturated carboxylic acids or monoesters of unsaturated dicarboxylic acids A2, monomers A3 selected from vinylaromatic compounds, n-butyl methacrylate and also alkyl esters of unsaturated carboxylic acids or dialkyl esters of unsaturated dicarboxylic acids, esters A4 selected from alkyl esters of unsaturated carboxylic acids of dialkyl esters of unsaturated dicarboxylic acids, and other free-radically polymerizable monomers A5, and subsequent addition of a second monomer mixture B and further polymerization in the second stage, the mixture B comprising olefinically unsaturated monomers B1 corresponding to A1, esters B2 corresponding to A4, and monomers B3 corresponding to A5, and subsequently adding compounds C having hydrazine or hydrazide groups.