Patent ID: 11897979
Assignee: CHANGCHUN UNIVERSITY OF TECHNOLOGY
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 2:
3. The method according to claim 1, wherein:
the vinyl acid monomer is at least one item selected from the group consisting of acrylic acid, methacrylic acid, itaconic acid, methylfumaric acid, 2-butenoic acid, maleic acid, methylmaleic acid, 2-acrylamido-2-methylpropanesulfonic acid, and methylallylsulfonic acid;
the vinylamine monomer is at least one item selected from the group consisting of dimethylamino ethyl methacrylate, 2-ethylamino ethyl methacrylate, and N,N-dimethylallylamine;
the vinylamide monomer is at least one item selected from the group consisting of acrylamide, methacrylamide, N-hydroxymethyl acrylamide, N,N-dimethylacrylamide, amine methylallyl sulfonate, and amine styrene sulfonate; and
the ammonium salt of the vinyl acid comprises ammonium itaconate.