Patent ID: 6043301
Filing Date: 2000-03-28
Classification: C08G,C08L,C09D

Abstract:
An aqueous coating composition comprising:a. an aqeous, polyester- and acrylate-based polymer dispersion having a solids content of from 35 to 50% by weight and obtainable by free radical polymerization of:1.) from 80 to 20% by weight of:i. at least one (meth) acrylic acid ester of mono- or polyalcohols, wherein said esters may contain free hydroxyl groups;ii. at least one ethylenically unsaturated, at least monofunctional acid and optionallyiii. at least one ethylenically unsaturated monomer other than i and ii or mixtures thereof: with2.) from 20 to 80% by weight of a polyester resin capable of undergoing free-readical polymerization containing of from 0.2 to 1.5 polymerizable double bonds per molecule and having a molecular weight of from 300 to 8,000, said resin being obtainable by a polycondensation of at least dihydric polyalcohols with at least dibasic polycarboxylic acids or derivatives thereof in the presence of polyalcohols containing at least one polymerizable double bond, the amounts employed of i,ii and iii and the polyester resin being such that the resulting polymer has a hydroxyl value (OH value) of from 30 to 200 and an acid value of from 5 to 100;b. at least one amino resin as crosslinking agent, wherein the weight ratio of the solids content of the polymer dispersion to the crosslinking agent is from 60:40 to 85:15;c. at least one water-soluble and/or water-emulsifiable low-molecular weight polyalcohol comprising dimethylolcyclohexane and in an amount of from 0.5% to 15% by weight, based on the solids content of the polymer dispersion said low-molecular polyalcohol being non-volatile and reacting with said amino resin under baking conditions; and optionallyd. conventional lacquer additives.