Patent ID: 7897013

Claim:
A composition for enhancing the wet strength of paper comprising a blend of two components: (a) a polymeric paper strengthening agent; and (b) a stabilized glyoxalated polyacrylamide in a concentration of between about 1% and about 35% by weight of the two components, wherein the stabilized glyoxalated polyacrylamide is prepared by (1) reacting a first portion of glyoxal with a polyacrylamide having pendant amide groups to form a first reaction mixture comprising glyoxalated polyacrylamide; (2) adding an acid to the first reaction mixture to form a second reaction mixture having a reduced pH and comprising the glyoxalated polyacrylamide; and (3) adding a second portion of glyoxal to the second reaction mixture to form the stabilized glyoxalated polyacrylamide.