Patent ID: 11939522
Assignee: S.P.C.M. SA
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C  E | IPC C  E

Claim 2:
3. The method according to claim 1, wherein the water-soluble polymer is an amphoteric polymer of acrylamidopropyltrimethylammonium chloride and of at least one anionic monomer, wherein the anionic monomer is selected from the group consisting of acrylic acid, methacrylic acid, itaconic acid, crotonic acid, maleic acid, fumaric acid, sulphonated monomers, phosphonated monomers, 2-acrylamido-2-methylpropanesulphonic acid, vinylsulphonic acid, vinylphosphonic acid, allylsulphonic acid and allylphosphonic acid, wherein the anionic monomer is not in salt form or partially or totally in salt form.