Absorption rate of absorbent polymers by treating with glyoxal
Patent 4051086 Issued on September 27, 1977. Estimated Expiration Date: 
September 27, 1994. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
September 27, 1994. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.InventorAssigneeApplicationNo. 05/670484 filed on 03/25/1976US Classes:525/154, With saturated aldehyde or aldehyde derivative (including methylol ethers or condensates) reactant or solid polymer thereof; or with solid copolymer derived from at least one aldehyde or aldehyde derivative reactant wherein at least one of the reactants forming the solid copolymer is saturated; or with SPFI wherein at least one of the necessary ingredients is an aldehyde or aldehyde derivative reactant or with a reaction product thereof; or with SICP containing an aldehyde or aldehyde derivative525/385, Oxygen compound contains an ether group525/54.3, Previously formed solid polymer containing chemically combined carbohydrate admixed with a chemical treating or ethylenic agent, SPFI, SICP, or solid polymer528/493, Aldehyde or ketone604/368, Collagen or gelling material604/376Carboxy-radical containingExaminersPrimary: Woodberry, Edward M.Attorney, Agent or FirmAbstractWater-absorbent crosslinked polymers are improved in their wicking capacity by treatment of their surface with glyoxal. The polymer can be a polysaccharide--acrylamide graft copolymer or a polymer or copolymer of acrylamide and/or sodium acrylate or sodium methacrylate.Other References
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