Glyoxalated polyacrylamide compositions

C - Chemistry – Metallurgy – 08 – L

Patent

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Details

C08L 33/26 (2006.01) C08F 8/00 (2006.01) C08F 120/56 (2006.01) C08K 5/19 (2006.01) D21H 17/33 (2006.01) D21H 21/20 (2006.01)

Patent

CA 2498021

A method for making a storage-stable glyoxalated polyacrylamide composition suitable for use as a strengthening agent for paper in which the glyoxal is added to the base polyacrylamide polymer in two portions and a scavenger for aldehyde groups is used. Aldehyde scavengers which are adducts of choline or a choline salt and an optionally substituted acrylamide monomer can be used to stabilize glyoxalated polyacrylamide compositions and to provide supplementary cationic charges for the polymer backbone. Compositions comprising a blend of a storage-stable glyoxalated polyacrylamide and a polymeric paper strengthening agent can be used to enhance the strength of paper, particularly the wet strength of paper.

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