Method for the surface modification of formed bodies and formed bodies produced thereby
AssigneeSartorius AG
InventorsWolfgang Demmer, Hans-Heinrich Horl, Dietmar Nussbaumer, Abdul R. Weiss, Eberhard Wunn
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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.
Claims13
A method of grafting polymerized components onto the surface of a polymeric microporous support membrane comprising the following steps:
- (a) providing a polymeric microporous support membrane;
- (b) forming a coated support membrane by coating said support membrane with a coating comprising an N-halogenated compound selected from an N-halogenated polymer and an N-halogenated polymeric precursor;
- and
- (c) grafting said coating to said coated support membrane by contacting the same with an ethylenically unsaturated monomer and sodium dithionite in a primarily aqueous solution.
A method of grafting polymerized components onto the surface of a polymeric microporous support membrane comprising the following steps:
- (a) providing a polymeric microporous support membrane;
- (b) forming a coated support membrane by coating said support membrane with a coating comprising an N-containing compound selected from an N-containing polymer and an N-containing polymeric precursor wherein said N has bonded thereto at least one hydrogen atom substitutable by halogen;
- and
- (c) grafting said coating to said coated support membrane by contacting the same with an ethylenically unsaturated monomer and sodium dithionite in a primarily aqueous solution that contains an organic halogen compound selected from carbon tetrachloride and trichloroacetic acid.
Dependencies are inferred from the claim text.