Glyoxylated polyacrylamide composition strengthening agent
AssigneeGeorgia-Pacific Resins, Inc.
InventorsCornel Hagiopol, Yuping Luo, David F. Townsend, Karla D. Favors, James W. Johnston, Clay E. Ringold, Lakeisha D. Saddler, Donald G. Jenkins
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Abstract
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.
Claims31
A method for producing a glyoxalated polyacrylamide composition of improved stability useful for strengthening paper comprising reacting a first portion of glyoxal with a polyacrylamide having pendant amide groups to form a glyoxalated polyacrylamide and thereafter acidifying the glyoxalated polyacrylamide and adding a second portion of glyoxal to the acidified glyoxalated polyacrylamide to produce the glyoxalated polyacrylamide composition of improved stability.
A glyoxalated polyacrylamide composition of improved stability prepared by reacting a first portion of glyoxal with a polyacrylamide having pendant amide groups to form a glyoxalated polyacrylamide and thereafter acidifying the glyoxalated polyacrylamide and adding a second portion of glyoxal to the acidified glyoxalated polyacrylamide to produce the glyoxalated polyacrylamide composition of improved stability.
Dependencies are inferred from the claim text.