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US 11,529,589 B2Granted
Method for producing a porous monolayer polymer membrane, porous monolayer polymer membrane, and use thereof for filtration
AssigneeSartorius Stedim Biotech GmbH
InventorsBjörn Hansmann, Jörg Hosch, Jan Schwellenbach
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Abstract
The present invention relates to a method for producing a porous monolayer polymer membrane, to a porous monolayer polymer membrane, and to the use of the polymer membrane for filtration.
Claims7
A method for producing a porous monolayer polymer membrane, which comprises the following steps:
- (A) providing a membrane-forming casting solution which comprises a membrane-forming polymer and a solvent therefor;
- (B) providing a non-membrane-forming and nonprecipitating protective solution;
- (C) providing a support;
- (D) applying at least the casting solution and the protective solution to the support to form a film comprising a casting solution layer and a protective solution layer bordering thereon, wherein the film is formed by applying the casting solution to the support to form the casting solution layer, and applying the protective solution layer to the casting solution layer to form the protective solution layer;
- (E) contacting the film with a precipitant;
- and
- (F) removing the protective solution layer by dissolving or chemically decomposing the protective layer solution.
4 more elements
Dependencies are inferred from the claim text.