Preparation of modified polymers of N-vinylpyrrolid-2-one and their use for the preparation of polymers interrupted by bridge members

US4229551A · kind A · utility

Assignee

• BASF SE

Inventors

• Ferdinand Straub · Hockenheim, DE
• Herbert Spoor · Schifferstadt, DE
• Claus Cordes

Key dates

• Filing date: Jul 9, 1979
• Grant date: Oct 21, 1980
• Expiry date: Jul 9, 1999

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F8/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for the preparation of modified poly-N-vinylpyrrolid-2-one containing two identical reactive groups, wherein polyvinylpyrrolidone is treated with complex hydrides, with or without further reaction of the modified polyvinylpyrrolidone with a reactive bifunctional compound, to give a polymer which has a molecular weight at least 2.5 times as great as that of the starting polymer.