GB1295585A – – Google Patents
GB1295585A – – Google Patents
Info
Publication number
GB1295585A
GB1295585A
GB1295585DA
GB1295585A
GB 1295585 A
GB1295585 A
GB 1295585A
GB 1295585D A
GB1295585D A
GB 1295585DA
GB 1295585 A
GB1295585 A
GB 1295585A
Authority
GB
United Kingdom
Prior art keywords
polymer
solvent
membrane
good
miscible
Prior art date
1970-05-13
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
1970-05-13
Filing date
1971-04-19
Publication date
1972-11-08
1971-04-19
Application filed
filed
Critical
1972-11-08
Publication of GB1295585A
publication
Critical
patent/GB1295585A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
C—CHEMISTRY; METALLURGY
C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
C08J9/28—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof by elimination of a liquid phase from a macromolecular composition or article, e.g. drying of coagulum
B—PERFORMING OPERATIONS; TRANSPORTING
B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
B01D—SEPARATION
B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
B01D67/0002—Organic membrane manufacture
B01D67/0009—Organic membrane manufacture by phase separation, sol-gel transition, evaporation or solvent quenching
B01D67/0011—Casting solutions therefor
B—PERFORMING OPERATIONS; TRANSPORTING
B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
B01D—SEPARATION
B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
B01D67/0002—Organic membrane manufacture
B01D67/0009—Organic membrane manufacture by phase separation, sol-gel transition, evaporation or solvent quenching
B01D67/0013—Casting processes
B—PERFORMING OPERATIONS; TRANSPORTING
B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
B01D—SEPARATION
B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
B01D69/02—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor characterised by their properties
B—PERFORMING OPERATIONS; TRANSPORTING
B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
B01D—SEPARATION
B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
B01D71/06—Organic material
B01D71/52—Polyethers
B—PERFORMING OPERATIONS; TRANSPORTING
B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
B01D—SEPARATION
B01D2323/00—Details relating to membrane preparation
B01D2323/12—Specific ratios of components used
B—PERFORMING OPERATIONS; TRANSPORTING
B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
B01D—SEPARATION
B01D2325/00—Details relating to properties of membranes
B01D2325/02—Details relating to pores or porosity of the membranes
B01D2325/022—Asymmetric membranes
C—CHEMISTRY; METALLURGY
C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
C08J2201/00—Foams characterised by the foaming process
C08J2201/04—Foams characterised by the foaming process characterised by the elimination of a liquid or solid component, e.g. precipitation, leaching out, evaporation
C08J2201/054—Precipitating the polymer by adding a non-solvent or a different solvent
C08J2201/0542—Precipitating the polymer by adding a non-solvent or a different solvent from an organic solvent-based polymer composition
C08J2201/0543—Precipitating the polymer by adding a non-solvent or a different solvent from an organic solvent-based polymer composition the non-solvent being organic
C—CHEMISTRY; METALLURGY
C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
C08J2201/00—Foams characterised by the foaming process
C08J2201/04—Foams characterised by the foaming process characterised by the elimination of a liquid or solid component, e.g. precipitation, leaching out, evaporation
C08J2201/054—Precipitating the polymer by adding a non-solvent or a different solvent
C08J2201/0545—Precipitating the polymer by adding a non-solvent or a different solvent from an aqueous solvent-based polymer composition
C08J2201/0546—Precipitating the polymer by adding a non-solvent or a different solvent from an aqueous solvent-based polymer composition the non-solvent being organic
Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
Y10S264/14—Plastic and nonmetallic article shaping or treating: processes forming integral skin on a foamed product
Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
Y10T428/00—Stock material or miscellaneous articles
Y10T428/249921—Web or sheet containing structurally defined element or component
Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
Y10T428/249961—With gradual property change within a component
Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
Y10T428/00—Stock material or miscellaneous articles
Y10T428/249921—Web or sheet containing structurally defined element or component
Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
Y10T428/249978—Voids specified as micro
Y10T428/249979—Specified thickness of void-containing component [absolute or relative] or numerical cell dimension
Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
Y10T428/00—Stock material or miscellaneous articles
Y10T428/249921—Web or sheet containing structurally defined element or component
Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
Y10T428/249987—With nonvoid component of specified composition
Y10T428/249988—Of about the same composition as, and adjacent to, the void-containing component
Y10T428/249989—Integrally formed skin
Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
Y10T428/00—Stock material or miscellaneous articles
Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
Y10T428/268—Monolayer with structurally defined element
Abstract
1295585 Microporous membrane GENERAL ELECTRIC CO 19 April 1971 [13 May 1970] 9865/71 Heading B5B A microporous membrane wherein the pores increase progressively in size across the membrane thickness and wherein the porosity is provided by a network of interconnected micropores extending through a mass of polymer crystals interconnected in a network of the same polymer, is made by dissolving the polymer in a mixture of a relatively good and a relatively poor solvent, the “good” solvent being the more volatile and the solvents being miscible, casting the solution on to a flat surface and allowing partial desolvation to occur, followed by immersion in a leaching agent, which is a non-solvent for the polymer but is miscible with both solvents, whereby a membrane forms by coagulation, the membrane being removed and dried. The polymer is a polyarylene oxide, polycarbonate, polyalkyl methacrylate or polysulphone. The largest pore size may be 100 . The film may have on its least porous surface a thin, dense skin (e.g. 100 -10 Á thick), this being obtained by extending the desolvation period. Specified polymer-good solvent-poor solvent-leaching agent combinations are: polymethylmethacrylate-acetoneformamide-water; a copolymer of bisphenol A and dichlorodiphenylsulphone or a polycarbonate – chloroform – toluene – methanol; and polyxylylene oxide – chloroform – dichlorobenzene-methanol.
GB1295585D
1970-05-13
1971-04-19
Expired
GB1295585A
(en)
Applications Claiming Priority (3)
Application Number
Priority Date
Filing Date
Title
US3692370A
1970-05-13
1970-05-13
US15897971A
1971-07-01
1971-07-01
US35242873
US3852388A
(en)
1970-05-13
1973-04-19
Preparation of asymmetric polymer membranes
Publications (1)
Publication Number
Publication Date
GB1295585A
true
GB1295585A
(en)
1972-11-08
Family
ID=27365117
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB1295585D
Expired
GB1295585A
(en)
1970-05-13
1971-04-19
Country Status (4)
Country
Link
US
(3)
US3709774A
(en)
DE
(1)
DE2123433A1
(en)
FR
(1)
FR2091291A5
(en)
GB
(1)
GB1295585A
(en)
Cited By (4)
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Priority date
Publication date
Assignee
Title
DE2739118A1
(en)
*
1976-09-03
1978-03-09
Asahi Chemical Ind
SEMIPERMEABLE MEMBRANES AND THE PROCESS FOR THEIR PRODUCTION
FR2424750A1
(en)
*
1978-05-02
1979-11-30
Asahi Chemical Ind
SEMI-PERMEABLE MEMBRANE IN POLYARYL ETHER SULFONE AND PRODUCTION PROCESS
US4308145A
(en)
*
1976-03-19
1981-12-29
United States Of America
Relatively thick polycarbonate membranes for use in hemodialysis
US5980746A
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*
1996-11-14
1999-11-09
Pall Corporation
Membrane and methods of preparing and using same
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1971-06-21
1975-12-16
Ionics
Ion exchange membranes having a macroporous surface area
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1971-09-07
1975-04-23
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Polyvinyl acetal membrane
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1971-10-18
1976-03-23
Chemical Systems, Inc.
Integral microporous high void volume polycarbonate membranes and a dry process for forming same
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1972-02-22
1979-12-25
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Biocompatible articles having high permeability to gases derived from polysulfones
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1972-07-31
1973-12-25
Gen Electric
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1973-02-27
1978-02-14
Rhone-Poulenc, S.A.
Anisotropic phenolic polyether membrane
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1973-03-27
1978-08-31
JPS5727366B2
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1974-03-18
1982-06-10
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1974-03-21
1985-12-31
Institute Of Gas Technology
Gas sweetening by membrane permeation
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Membranes
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1974-06-05
1978-09-12
E. I. Du Pont De Nemours And Company
Asymmetric polyimide membranes
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1974-10-15
1975-10-14
Minnesota Mining & Mfg
Microporous sheet having suede-like surface and method of making
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1975-05-01
1977-07-12
Chemical Systems Incorporated
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1976-11-01
1981-09-15
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1977-10-14
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1984-12-18
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1983-02-04
1988-09-23
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1983-05-09
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Title
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(en)
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1963-06-13
1969-06-17
Yuasa Battery Co Ltd
Method of making porous bodies
US3350844A
(en)
*
1964-09-21
1967-11-07
Gen Electric
Process for the separation or enrichment of gases
US3331772A
(en)
*
1965-08-03
1967-07-18
Atlantic Refining Co
Desalting water by reverse osmosis through novel semipermeable membranes
US3332894A
(en)
*
1966-12-06
1967-07-25
Paul A Cantor
Polyvinyl carbonate desalination membrane and a method of producing the same
US3567666A
(en)
*
1968-02-02
1971-03-02
Carl Berger
Separation means
US3567810A
(en)
*
1968-04-01
1971-03-02
Amicon Corp
Process for making high-flow anisotropic membranes
US3615024A
(en)
*
1968-08-26
1971-10-26
Amicon Corp
High flow membrane
1970
1970-05-13
US
US3709774D
patent/US3709774A/en
not_active
Expired – Lifetime
1971
1971-04-19
GB
GB1295585D
patent/GB1295585A/en
not_active
Expired
1971-05-06
FR
FR7116373A
patent/FR2091291A5/fr
not_active
Expired
1971-05-12
DE
DE19712123433
patent/DE2123433A1/en
active
Pending
1971-07-01
US
US3762136D
patent/US3762136A/en
not_active
Expired – Lifetime
1973
1973-04-19
US
US35242873
patent/US3852388A/en
not_active
Expired – Lifetime
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Publication date
Assignee
Title
US4308145A
(en)
*
1976-03-19
1981-12-29
United States Of America
Relatively thick polycarbonate membranes for use in hemodialysis
DE2739118A1
(en)
*
1976-09-03
1978-03-09
Asahi Chemical Ind
SEMIPERMEABLE MEMBRANES AND THE PROCESS FOR THEIR PRODUCTION
FR2424750A1
(en)
*
1978-05-02
1979-11-30
Asahi Chemical Ind
SEMI-PERMEABLE MEMBRANE IN POLYARYL ETHER SULFONE AND PRODUCTION PROCESS
US5980746A
(en)
*
1996-11-14
1999-11-09
Pall Corporation
Membrane and methods of preparing and using same
Also Published As
Publication number
Publication date
US3852388A
(en)
1974-12-03
FR2091291A5
(en)
1972-01-14
US3709774A
(en)
1973-01-09
US3762136A
(en)
1973-10-02
DE2123433A1
(en)
1971-12-02
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Legal Events
Date
Code
Title
Description
1973-03-21
PS
Patent sealed [section 19, patents act 1949]
1979-12-05
PCNP
Patent ceased through non-payment of renewal fee
