Patent ID: 6361768
Filing Date: 2002-03-26
Classification: A61K,A61P,A61Q,C08F,D06M

Abstract:
A hydrophilic ampholytic polymer formed by copolymerization of:0.05 to 20 mole percent of an anionic monomer having at least one carboxy-functional group; 10 to 45 mole percent of a non-quaternized cationic monomer having at least one amino-functional group; 35 to 95 mole percent of a non-ionic hydrophilic monomer; 0.5 to 10 mole percent of a hydrophobic monomer; and, 0 to 1.5 mole percent of a cross-linking monomer, and wherein the monomers are selected so as to provide the copolymer with a glass transition temperature of above about 50Â° C. and the non-quaternized cationic monomer to the anionic monomer ratio is from about 2:1 to about 16:1.