PROCEDURE FOR PRODUCING A TENSE MEMBRANE COMPOSED OF A MICROPOROUS SUBSTRATE, AN INTERMEDIATE LAYER AND A POLYMERIZED FILM, PARTICULARLY OF POLYURETHANE.

摘要

Composite dense membranes are described comprising (1) a dense ultrathin selective film of a silicon-free polymerizate, (2) a dense, highly permeable intermediate layer formed by conventional polymerization fluids, e.g., gases may be selectively separated using such a composite dense membrane and (3) a microporous substrate supporting the plasma polymerizate film and the intermediate layer.