REDUCED BYPRODUCT POLYAMINE-EPIHALOHYDRIN RESINS

摘要

Processes for rendering a polyamine-epihalohydrin resin storage stable, including processes that prepare a storage stable resin and/or processes tha t treat resins. A composition containing a polyamine-epihalohydrin resin which includes CPD-forming species can be treated with at least one agent under conditions to at least one of inhibit, reduce and remove the CPD-forming species to obtain a reduced CPD-forming resin so that a composition containi ng the reduced CPD-forming polyamine-epihalohydrin resin when stored for 2 week s at 50~C, and a pH of about 2.5 to 3.5 contains less than about 250 ppm dry basis of CPD. The invention is also directed to a gelation storage stable reduced CPD-forming resin so that a composition containing the reduced CPD- forming polyamine-epihalohydrin resin, when stored at pH 1 for 24 hours at 50~C and measured at 24 hours, produces less than about 1000 ppm dry basis o f CPD. A paper product containing the storage stable polyaminopolyamide- epihalohydrin resin, when corrected for adding at about a 1 wt% addition lev el of the polyaminopolyamide-epihalohydrin resin, contains less than about 250 ppb of CPD. Moreover, a resin can be prepared starting from a prepolymer having a low acid number or low concentration of acid end groups. The invention is also directed to papers containing the resins.