Patent ID: 6191210
Filing Date: 2001-02-20
Classification: C09D

Abstract:
An aqueous coating material, comprising at least one water-dilutable binder resulting from the free-radical polymerization of:(A) from 20 to 90% by weight of a mixture of monomers, comprising:(a1) from 3 to 50% by weight of a first monomer selected from the group consisting of acrylic acid, methacrylic acid and mixtures thereof, and(a2) from 50 to 97% by weight of an ethylenically unsaturated second monomer which is different from said first monomer (a1) or a mixture of such ethylenically unsaturated monomers,wherein the composition of said mixture of monomers (a1) and (a2) is selected such that polymerization of said mixture of monomers (a1) and (a2) alone gives a polymer whichhas a glass transition temperature of from 0 to 150 degrees C.,contains from 0.04 to 1.0 milliequivalents of one or more of the following functional groups: --COOH, --OH, --NR.sub.3, --CN, --CONH.sub.2, --CO--, --NHCONH--, --OCONH--, --OPO.sub.3 H, --OSO.sub.3 H, --R--OR--R--, (where R is an organic radical), andcomprises from 0 to 50% by weight of one or more cycloaliphatic groups substituted by at least one alkyl group having 1 to 12 carbon atoms and selected from the group consisting of cyclopentyl, cyclohexyl, perhydronapthyl, perhydroanthracyl, perhydrophenanthryl, adamantyl, isobornyl, bicyclohexyl, bicycloheptyl, bicyclooctyl, bicyclononyl, bicyclodecyl, bicycloundecyl, biciclododecyl groups and mixtures thereof;in the presence of(B) from 9.9 to 79.9% by weight of a halogen-free copolymer composed of:(b1) from 1 to 99% of propylene;(b2) from 1 to 99% by weight of at least one olefin which is copolymerizable with (b1) and which contains per molecule from five to twenty carbon atoms, with the exception of isoprene, and(b3) from 0 to 50% by weight, of a member of the group consisting of ethylene butylene, and mixtures thereof,or of a mixture of such copolymers, and(C) from 0.1 to 10% by weight of a free-radical initiator or a mixture of free-radical initiators,and, after neutralization of at least 20% of the carboxyl groups which are present in the resulting polymerization product,dispersing the polymerization product in water,wherein the sum of the percentages by weight of components (A), (B), and (C) and of (a1) and (a2) and (b1), (b2) and (b3) is, in each case, always 100% by weight.