Method for eliminating formamide from polymerizates containing n-vinyl formamide units

US6541573B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Manfred Niessner · Schifferstadt, DE
• Martin Rubenacker · Altrip, DE
• Norbert Mahr · Schifferstadt, DE

Key dates

• Filing date: Feb 7, 2001
• Grant date: Apr 1, 2003
• Expiry date: Feb 7, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F6/006
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for the elimination of formamide from polymers containing N-vinylformamide units involves treating formamide-containing polymers with from 1 to 2 mol-equivalents of an acid or a base, based on 1 mol-equivalent of formamide, under reaction conditions such that the N-vinylformamide units in the polymer undergo virtually no hydrolysis.