Title: Treatment of resins to lower levels of cpd-producing species and improve gelation stability
Application Number: 200480021017 Application Date: 2004.05.14
Publication Number: 1826370 Publication Date: 2006.08.30
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: C08G73/02,D21H17/55,D21H21/20
Applicant(s) Name: Hercules Inc. Address:
Inventor(s) Name:
Attorney & Agent: guo xiaodong
Abstract:
     A process for treating a composition containing a polyamine-epihalohydrin resin that has a low level of CPD-producing species and good gelation stability is disclosed. A polyamine-epihalohydrin resin is prepared with a ratio of epihalohydrin: amine of less than about 1.1:1.0; The resin is then subjected to a base treatment followed by an acid treatment resulting in a resin that has good gelation storage stability and produces low levels of CPD.
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