Patent ID: 7303652
Filing Date: 2007-12-04
Classification: C08G,C12N

Abstract:
1. A process for rendering a polyamine-epihalohydrin resin storage stable, comprising: treating a composition containing a polyamine-epihalohydrin resin, the composition comprising a solids content of at least 15 wt % and including CPD-forming species, and wherein the resin is formed in a reaction having a molar ratio of epihalohydrin to secondary amine group of less than 0.50, with at least one enzymatic agent under conditions to at least one of inhibit, reduce and remove the CPD-forming species to obtain a gelatin storage stable reduced CPD-forming resin so that the composition containing the reduced CPD-forming polyamine-epihalohydrin resin when stored for 24 hours at 50° C., and a pH of about 1.0 releases less than about 100 ppm dry basis of CPD, wherein the solids content of the composition containing a polyamine-epihalohydrin resin is at least 15 wt % when treated with the at least one enzymatic agent and wherein the at least one enzymatic agent is selected from the group consisting of an esterase, a lipase, a protease or a combination thereof.