Patent ID: 6891009
Filing Date: 2005-05-10
Classification: A61K,A61Q,C08F

Abstract:
1. A water-soluble or water-swellable crosslinked copolymer consisting essentially of a1) 1 to 50% by weight of a repeating structural unit of formula (1)  where n is an integer from 2 to 9,  or a2) 1 to 50% by weight of a mixture of the repeating structural unit of the formula (1) and a repeating structural unit of formula (2)  where R, R b) 49.99 to 98.99% by weight of a repeating structural unit of formula (3)  in which R c) 0.01 to 8% by weight of crosslinking structures resulting from a monomer having at least two olefinic double bonds.