Patent ID: 7335699

Claim:
Water-soluble aminoplast ether copolymers of the following structural type: where: Z comprises an aminoplast unit based on a glycolurile of formula wherein R is selected from the group consisting of hydrogen, alkyl groups, and acyl groups; B comprises a radical of an essentially water-insoluble polymer selected from poly-n-butyl acrylate, poly-n-butyl methacrylate, polyethyl acrylate, polytetrahydrofuran, polyethyl methacrylate, polymethyl acrylate, polymethyl methacrylate, a predominantly aliphatic polycarbonate and a predominantly aromatic polycarbonate, which are able to react with the OR-function of the aminoplast unit, R1 comprises a radical of a hydrophilic organic compound containing at least one functional group which is able to react with the OR group of the aminoplast unit to form an ether bond, selected from the group consisting of a radical of methylcellulose, polyacrylic acid, polymethacrylic acid, ethylene/acrylic acid/sodium acrylate copolymer, polyalkylglycol, polyvinyl alcohols and polyvinylpyrrolidone, and a is at least 1; wherein the overall mass of the water-soluble aminoplast ether copolymer is from about 2000 to 50 000 g/mol.