公开(公告)号：US3703570A

公开(公告)日：1972-11-21

申请号：US3703570D

申请日：1969-12-29

Applicant: KALLE AG

Inventor： BUSCH WALTER ,  SCHWARZER FRANZ

IPC: B01D65/02 ,  B01D71/56 ,  C08J9/28 ,  B29D7/22 ,  B29D27/04 ,  C08G20/10

CPC classification number: B01D71/56 ,  C08J9/28 ,  C08J2201/0544

Abstract: THIS INVENTION RELATES TO AN IMPROVEMENT IN THE PROCESS FOR THE PREPARATION OF A SEMIERMEABLE MEMBRANE BY POURING A LAYER OF A SOLUTION OF A PLASTIC ONTO A SUPPORT, EVAPORATING A PORTION OF THE SOLVENT FROM THE LAYER WHEREBY THE LAYERS IS PROVIDED WITH A SURFACE LAYER POOR IN SOLVENT, AND REMOVING THE REMAINING SOLVENT FROM THE LAYER BY MEANS OF A LIQUID WHICH IS MISCIBLE WITH THE SOLVENT BUT DOES NOT DISSOLVE THE PLASTIC, THE IMPROVEMENT COMPRISNG EMPLOYING AS THE PLASTIC AT LEAST ONE POLYAMIDE WHICH IS A POLYMERIZED B-LACTAM UNSUBSTITUTED AT THE NITROGEN ATOM.

公开(公告)号：US3461115A

公开(公告)日：1969-08-12

申请号：US3461115D

申请日：1964-08-25

Applicant: KALLE AG

Inventor： SCHWARZER FRANZ

IPC: C08B11/20 ,  C08B31/00 ,  C08B37/00 ,  C08F8/14 ,  C08K5/092 ,  C08K5/11 ,  C08B11/08 ,  C08B13/00

CPC classification number: C08K5/092 ,  C08B11/20 ,  C08B31/00 ,  C08B37/00 ,  C08F8/14 ,  C08K5/11 ,  C08L29/04