Patent · US Expired

Epihalohydrin-based resins having a reduced halogen content

US5516885A · kind A · utility

12Cited by

9References

12Claims

0Family size

Assignee

AKZO NOBEL N.V. · NL

Inventors

Marek Gorzynski · Düren, DE
Andreas Pingel · Düren, DE

Key dates

Filing date	Dec 15, 1993
Grant date	May 14, 1996
Priority date	—
Expiry date	Dec 15, 2013

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD21H17/56
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The disclosed invention pertains to a process for the preparation of a water-soluble, nitrogen-containing, epihalohydrin-based 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 ion-exchanger. 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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.