Water-soluble graft copolymers of starch-acrylamide and uses therefor
AssigneeUniversity of Florida
InventorsGeorge B. Butler, Thieo E. Hogen-Esch, John J. Meister, Huey Pledger, Jr.
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Abstract
Graft copolymers having starch as the central chain with grafted side chains of acrylamide or acrylamide-acrylic acid, and a process for preparation of such copolymers in the presence of Ce.sup.+4 or other redox initiators. These copolymers are employed in preparing highly viscous aqueous solutions that are particularly useful in oil recovery from subterranean wells.
Claims5
Water-soluble graft copolymer comprising a backbone molecule of water-soluble starch with branch chains grafted thereto of polymerized acrylamide units or a mixture of polymerized acrylamide units and polymerized acrylic acid units.
Dependencies are inferred from the claim text.