Patent ID: 7323242

Claim:
A heat-curable binder based on an aqueous polymer dispersion, said aqueous polymer dispersion comprising: an emulsion polymer (EP) prepared by emulsion polymerization of constituent monomers in an aqueous medium, said constituent monomers comprising principle monomers and copolymerizable monomers, which, when comprising monomers containing carboxylic acid groups or carboxylic anhydride groups, the fraction of said monomers containing carboxylic acid groups or carboxylic anhydride groups being less than 5% by weight of the emulsified polymer that is formed; an acid polymer (SP) composed of 40 to 100% by weight of an ethylenically unsaturated monocarboxylic acid, an ethylenically unsaturated dicarboxylic acid or an ethylenically unsaturated dicarboxylic anhydride; and a curative comprising monofunctional or polyfunctional epoxide compounds and further comprising a curative selected from the group consisting of a polyol having a molecular weight of less than 1000 g/mol and an alkanolamine containing at least two hydroxyl groups.