Patent ID: 11958925
Assignee: UPL LTD
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A method for producing a superabsorbent polymer comprising:
a) graft polymerizing a monomer on a polysaccharide surface in the presence of a redox catalytic system to form a copolymer; and,
b) neutralizing the copolymer to obtain a granulated superabsorbent polymer;
wherein said redox catalyst system comprises cerium (+4) salts with at least one selected from the group consisting of: ceric ammonium nitrate; ammonium persulfate; sodium persulfate; potassium persulfate; ferrous peroxide; ferrous ammonium sulfate-hydrogen peroxide; L-ascorbic acid, and potassium permanganate-ascorbic acid;
wherein said monomer is at least one selected from the group of: acrylamide; methacrylamide; 2-acrylamido-2-methylpropanesulfonic acid; methacrylic acid; vinyl sulfonic acid; ethyl acrylate; and, potassium acrylate, and
wherein said graft polymerization is carried out at room temperature.