Epihalohydrin-based resins having a reduced halogen content

Abstract From the Canadian patent

The disclosed invention pertains to a process for the preparation of a watersoluble, nitrogen-containing, epihalohydrinbased resin having a reduced content of total halogen organic halogen, adsorbable organic halogen (AOX) and by-products. The process involves treatment of nitrogen-containing epihalohydrin-based resins , or intermediate reaction-products with a basic ionexchanger. The invention also pertains to novel resins displaying such halogen contents far below the values known in the art. Subject resins are useful as wet-strength agents for paper and are preferably of the polyaminoamide-epihalohydrin type.