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US 4,381,320 AGranted
Non-ionic absorbent polymers
AssigneeJohnson & Johnson
InventorHien V. Nguyen
Life of this patent
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Abstract
An absorbent material is produced by exposing an aqueous solution of polyvinyl alcohol and a low molecular weight, water soluble copolymer containing polymerized oxyethylene and oxypropylene units, to sufficient electromagetic or corpuscular ionizing radiation to form a gel.
Claims11
Process which comprises exposing an aqueous solution of polyvinyl alcohol and a low molecular weight, water-soluble copolymer containing polymerized oxyethylene and oxypropylene units to electromagnetic or corpuscular ionizing radiation of sufficient dosage to form a gel, wherein the molecular weight of said copolymer is below about 12,000.
Dependencies are inferred from the claim text.