PROCESS FOR THE PRODUCTION OF POLYAMIDOAMINE-EPICHLORHYDRIN RESINS FOR THE MANUFACTURE OF WET-RESISTANT PAPERS WITH A LOW MONOCHLORO-3-PROPANEDIOL-1,2 CONTENT

摘要

The invention concerns a method for obtaining polyamidoamine-epichlorhydrin resins (PAE) suited for making wet-strength paper with low monochloro-3-propanediol-1,2 content. The method consists in synthesizing resins as such, which are then percolated on activated carbon columns. Thus aqueous resins are obtained free of detectable organo-chlorinated by-products, which are used as wet-strength additives for making paper for special uses containing less than 50 ppb of monochloro-3-propanediol-1,2.