Process for the surface grafting of formed bodies, in particulate also microporous membranes made from nitrogen-containing polymers

US5215692A · kind A · utility

Assignee

• Sartorius AG · DE

Inventors

• Hans-Heinrich Horl · Bovenden, DE
• Dietmar Nussbaumer · Göttingen, DE
• Eberhard Wunn · Höchberg, DE

Key dates

• Filing date: May 1, 1992
• Grant date: Jun 1, 1993
• Expiry date: May 1, 2012

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S264/62
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Halogen-substitutable hydrogen atoms are linked to nitrogen atoms of a polymer, with ethylenically-unsaturated monomers. By using inorganic or organic hypohalogenites and/or organic N-halogen derivatives as halogenation means, hydrogen atoms on the nitrogen atoms of the polymer membranes or polymer formed materials are replaced by halogen atoms and part of these are removed by reducing agents in the presence of ethylenically unsaturated monomers, with radical grafting of these on to the nitrogen atoms, after which the remaining halogen atoms are removed by reducing agents in the absence of monomers.