Patent ID: 6753388
Filing Date: 2004-06-22
Classification: B03D,C08F

Abstract:
A structurally-modified water-soluble polymer having a reduced specific viscosity above 3 dl/g, the polymer prepared by initiating polymerization of an aqueous solution of monomers selected from the group consisting of acrylamide, methacrylamide, acrylic acid, sodium acrylate, ammonium acrylate, methacrylic acid, sodiumn methacrylate, ammonium methacrylate, 2-acrylamido-2-methylpropanesulfonic acid, 2-acrylamido-2-methylpropanesulfonic acid sodium salt, dialkylaminoalkyl acrylates and methacrylates and their quaternary or acid salts and dialkylaminoalkylacrylamides or methacrylamides and their quaternary or acid salts under free radical polymerization conditions to form a polymer solution and adding at least one structural modifier to the polymer solution after at least 30% polymerization of the monomers has occurred.