Method for the surface modification of formed bodies and formed bodies produced thereby

US5547575A · kind A · utility

Assignee

• Sartorius AG · DE

Inventors

• Wolfgang Demmer · Göttingen, DE
• Hans-Heinrich Horl · Bovenden, DE
• Dietmar Nussbaumer · Göttingen, DE
• Abdul Weiss · Göttingen, DE
• Eberhard Wunn · Höchberg, DE

Key dates

• Filing date: Dec 23, 1994
• Grant date: Aug 20, 1996
• Expiry date: Dec 23, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2427/12
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Fabrication of the surface-grafted microporous membranes by coating the membrane with an N-halogenated compound, followed by grafting with an unsaturated monomer and sodium dithionite in a primarily aqueous solution that may contain an organic halogen compound selected from carbon tetrachloride and trichloroacetic acid. The coating may be formed in situ and may be cross-linked.