Patent ID: 6140435
Filing Date: 2000-10-31
Classification: A61K,A61Q,C08F,C09D,Y10S

Abstract:
Cross-linked copolymers obtained by copolymerization of a monomeric system comprising:a) from about 10 to about 97% by weight of at least one ethylenically unsaturated mono- or dicarboxylic acid;b) from 0 to about 80% by weight of at least one (C.sub.1-20)alkyl or aralkyl ester of an ethylenically unsaturated mono- or dicarboxylic acid;c) from about 0.5 to about 80% by weight of at least one associative monomer which is an ester of formulaA--O--(CH.sub.2 CHR.sub.2 O).sub.x --(CH.sub.2).sub.y --R.sub.1whereinA is an ethylenically unsaturated acylic residue, optionally containing an additional carboxylic group, wherein, optionally, said additional carboxylic group may be esterified with a (C.sub.1-20)aliphatic alkyl group;R.sub.1 is an alkyl, alkylphenyl or aralkyl residue having from 1 to 30 carbon atoms;R.sub.2 is hydrogen, methyl or ethyl;x is comprised between 0 and 50;y is comprised between 0 and 30;d) from 0 to about 20% by weight of at least one ethylenically unsaturated amide;e) from about 0.2 to about 20% by weight of at least one cross-linking agent selected from the group consisting of a diester of an ethylenically unsaturated carboxylic acid and a polyoxyalkyleneglycol containing more than 10 oxyalkylene units and a diester of an ethylenically unsaturated carboxylic acid and an emulsifier having at least two free OH-groups;f) from 0 to about 20% by weight of at least one ethylenically unsaturated sulfonic add.