Process of preparing polyamine-epihalohydrin resins with reduced byproduct content

A process for rendering a polyamine-epihalohydrin wet strength resin storage stable, comprising: treating a composition containing a polyamine-epihalohydrin wet strength resin which includes CPD forming species with at least one enzymatic agent, under conditions to at least one of reduce and remove the CPD-forming species to obtain a gelation storage stable reduced CPD-forming wet strength resin, so that a composition containing the reduced CPD-forming polyamine-epihalohydrin wet strength resin, when stored at pH 1 for 24 hours at 50 °C and measured at 24 hours, produces less than about 250 ppm dry basis of CPD.