Cross-linkable homo- and copolymers

Claim 1

A leather dressing agent consisting essentially of an aqueous cross-linkable copolymer dispersion wherein said copolymer is a copolymer of A. from 0.5 to 30 percent by weight of an Alpha , Beta -unsaturated acylaminomethylene carbamic acid ester of the formula wherein R'' is hydrogen or methyl and R is chloroalkyl having from two to six carbon atoms and from one to three chlorine atoms or bromoalkyl having from two to six carbon atoms and from one to three bromine atoms and B. from 99.5 to 70 percent by weight of at least one monomer of the group consisting of methylmethacrylate, ethylacrylate, butylacrylate, 2-hydroxypropylacrylate, 2-hydroxypropylmethacrylate, 2-aminoethylacrylate hydrochloride, 2-aminoethylmethacrylate hydrochloride, methacrylic amide, methacrylamido-N-methylol methyl ether, methacrylic acid, acrylonitrile, vinyl acetate, styrene, butadiene and isoprene.