公开(公告)号：US3852388A

公开(公告)日：1974-12-03

申请号：US35242873

申请日：1973-04-19

Applicant: GEN ELECTRIC

Inventor： KIMURA S

IPC: B01D67/00 ,  B01D69/02 ,  B01D71/52 ,  C08J9/28 ,  B29D27/04 ,  B01D39/16

CPC classification number: C08J9/28 ,  B01D67/0011 ,  B01D67/0013 ,  B01D69/02 ,  B01D71/52 ,  B01D2323/12 ,  B01D2325/022 ,  C08J2201/0543 ,  C08J2201/0546 ,  Y10S264/14 ,  Y10T428/249961 ,  Y10T428/249979 ,  Y10T428/249989 ,  Y10T428/268

Abstract: A method is disclosed for the preparation (by the utilization of a proper solvent system) of dry asymmetric membranes comprising a porous layer of interconnected crystals of polymer material. Membranes of many polymer materials may be optionally prepared either with or without a dense surface layer as one face thereof. In either case the porous layer is structured with graded porosity. A three-component casting solution is prepared containing the polymer, a first good volatile solvent for the polymer and (relative to the first solvent) a poor less-volatile solvent for the polymer, which is miscible with the good solvent. A membrane is cast at room temperature, allowed to desolvate at room temperature for a short time and is then immersed in a precipitating agent, that is miscible with both the aforementioned solvents but is a non-solvent for the polymer. The membrane is then permitted to dry.

Abstract translation: 公开了一种用于制备干燥不对称膜（通过使用合适的溶剂体系）的方法，其包括聚合物材料的互连晶体的多孔层。 许多聚合物材料的膜可以任选地制备为具有或不具有致密表面层作为其一个面。 在任一种情况下，多孔层均具有渐变孔隙度。 制备含有聚合物的三组分流延溶液，用于聚合物的第一良好的挥发性溶剂和（相对于第一溶剂）聚合物的差的易挥发溶剂，其与良溶剂可混溶。 将膜在室温下浇铸，在室温下短时间脱盐，然后浸入与上述溶剂混溶的沉淀剂中，但是是聚合物的非溶剂。 然后允许膜干燥。

公开(公告)号：US3762136A

公开(公告)日：1973-10-02

申请号：US3762136D

申请日：1971-07-01

Applicant: GEN ELECTRIC

Inventor： KIMURA S

IPC: B01D67/00 ,  B01D69/02 ,  B01D71/52 ,  C08J9/28 ,  B01D53/22

CPC classification number: C08J9/28 ,  B01D67/0011 ,  B01D67/0013 ,  B01D69/02 ,  B01D71/52 ,  B01D2323/12 ,  B01D2325/022 ,  C08J2201/0543 ,  C08J2201/0546 ,  Y10S264/14 ,  Y10T428/249961 ,  Y10T428/249979 ,  Y10T428/249989 ,  Y10T428/268

Abstract: A method is disclosed for the preparation (by the utilization of a proper solvent system) of dry asymmetric membranes comprising a porous layer of interconnected crystals of polymer material. Membranes of many polymer materials may be optionally prepared either with or without a dense surface layer as one face thereof. In either case the porous layer is structured with graded porosity. A three-component casting solution is prepared containing the polymer, a first good volatile solvent for the polymer and (relative to the first solvent) a poor less-volatile solvent for the polymer, which is miscible with the good solvent. A membrane is cast, allowed to desolvate for a short time and is then immersed in a leaching agent, that is miscible with both the aforementioned solvents but is a non-solvent for the polymer. The membrane is then permitted to dry.

公开(公告)号：US3709774A

公开(公告)日：1973-01-09

申请号：US3709774D

申请日：1970-05-13

Applicant: GEN ELECTRIC

Inventor： KIMURA S

IPC: B01D67/00 ,  B01D69/02 ,  B01D71/52 ,  C08J9/28 ,  B32B5/18

CPC classification number: C08J9/28 ,  B01D67/0011 ,  B01D67/0013 ,  B01D69/02 ,  B01D71/52 ,  B01D2323/12 ,  B01D2325/022 ,  C08J2201/0543 ,  C08J2201/0546 ,  Y10S264/14 ,  Y10T428/249961 ,  Y10T428/249979 ,  Y10T428/249989 ,  Y10T428/268

Abstract: A METHOD IF DISCLOSED FOR THE PREPARATION (BY THE UTILIZATION OF A PROPER SOLVENT SYSTEM) OF DRY ASYMMETRIC MEMBERANES COMPRISING A POROUS LAYER OF INTERCONNECTED CRYSTALS OF POLYMER MATERIAL. MEMBRANES OF MANY POLYMER MATERIALS MAY BE OPTIONALLY PREPARED EITHER WITH OR WITHOUT A DENSE SURFACE LAYER AS ONE FACE THEREOF. IN EITHER CASE THE POROUS LAYER IS STRUCTURED WITH GRADED POROSITY. A THREE-COMPONENT CASTING SOLUTION SOLUTION IS PREPARED CONTAINING THE POLYMER, A FIRST GOOD VOLATILE SOLVENT FOR THE POLYMER AND (RELATIVE TO THE FIRST SOLVENT) A POOR LESS-VOLATILE SOLVENT FOR THE POLYMER, WHICH IS MISCIBLE WITH THE GOOD SOLVENT. A MEMBRANE IS CAST, ALLOWED TO DESOLVATE FOR A SHOT TIME AND IS THEN IMMERSED IN A LEACHING AGENT, THAT IT MISCIBLE WITH BOTH THE AFOREMENTIONED SOLVENTS BUT IS A NON-SOLVENT FOR THE POLYMER. THE MEMBRANE IS THEN PERMITTED TO DRY.

Abstract translation: 公开了一种用于制备干燥不对称膜（通过使用合适的溶剂体系）的方法，其包括聚合物材料的互连晶体的多孔层。 许多聚合物材料的膜可以任选地制备为具有或不具有致密表面层作为其一个面。 在任一种情况下，多孔层均具有渐变孔隙度。 制备含有聚合物的三组分流延溶液，用于聚合物的第一良好的挥发性溶剂和（相对于第一溶剂）聚合物的不良挥发性较差的溶剂，其与良溶剂可混溶。 将膜浇铸，允许脱溶剂短时间，然后浸入浸出剂中，其与上述溶剂可混溶，但是是聚合物的非溶剂。 然后允许膜干燥。