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US 6,280,571 B1Granted
Stabilizer for creping adhesives
AssigneeHercules Incorporated
InventorAnthony John Allen
Life of this patent
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Abstract
Composition comprising at least one water soluble polymer, such as polyamidoamine-epichlorohydrin resin, polyamine-epichlorohydrin resin, polyvinyl alcohol, etc. and at least one stabilizer, such as hypophosphorous acid, phosphorous acid, hypodiphosphoric acid, etc. and salts thereof, suitable as creping adhesive for paper.
Claims32
An aqueous composition comprising at least one water soluble polymer comprising at least one of polyamidoamine-epichlorohydrin resin polyamine-epichlorohydrin resin, reaction products of epichlorohydrin with highly branched polyamidoamines and polyvinyl alcohol;
- and at least one stabilizer present in an amount effective to stabilize the water soluble polymer against thermooxidative degradation, said at least one stabilizer comprising at least one of hypophosphorous acid, phosphorous acid, hypodiphosphioric acid, diphosphiorous acid, hypophosphioric acid, pyrophosphiorous acid and salts of any of these acids.
Dependencies are inferred from the claim text.