UST103601I4 - Process for preparation of microporous membranes of controlled flow characteristics - Google Patents

Process for preparation of microporous membranes of controlled flow characteristics Download PDF

Info

Publication number
UST103601I4
UST103601I4 US06446832 US44683282A UST103601I4 US T103601 I4 UST103601 I4 US T103601I4 US 06446832 US06446832 US 06446832 US 44683282 A US44683282 A US 44683282A US T103601 I4 UST103601 I4 US T103601I4
Authority
US
Grant status
Grant
Patent type
Prior art keywords
membrane
film
process
microporous
drying
Prior art date
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.)
Pending
Application number
US06446832
Inventor
Ronald V. Repetti
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Specialty Materials Inc
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.)
Filing date
Publication date
Grant date

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D67/00Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
    • B01D67/0081After-treatment of organic or inorganic membranes
    • B01D67/0095Drying
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D71/00Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
    • B01D71/06Organic material
    • B01D71/56Polyamides, e.g. polyester-amides
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C67/00Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • B29C67/20Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 for porous or cellular articles, e.g. of foam plastics, coarse-pored
    • B29C67/202Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 for porous or cellular articles, e.g. of foam plastics, coarse-pored comprising elimination of a solid or a liquid ingredient
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S264/00Plastic and nonmetallic article shaping or treating: processes
    • Y10S264/62Processes of molding porous films
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/249921Web or sheet containing structurally defined element or component
    • Y10T428/249953Composite having voids in a component [e.g., porous, cellular, etc.]
    • Y10T428/249978Voids specified as micro
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/31504Composite [nonstructural laminate]
    • Y10T428/31725Of polyamide

Abstract

A dimensionally stabilized microporous polyamide membrane having enhanced flow characteristics comprised of a film forming organic polymeric material of low shrinkage prepared by drying the membrane, under conditions of restraint in the plane of the membrane to minimize the shrinkage until the membrane is essentially in a dried condition. A process is also described for preparing a microporous membrane designed to enhance incorporation and retention of a charge modifying resin for use as a charge modified filter media. The process comprises preparing a dope solution of a film forming polymer in a solvent system, directly casting the solution under the surface of a quenching medium comprising a non-solvent system for the polymer for a time sufficient to form micropores in the film, and drying the film while controlling the planar dimensions of the film during the drying.
The foregoing process is particularly useful in the preparation of a charge modified membrane of enhanced electrokinetic capture potential in the filtration of charged submicronic contaminants from aqueous liquids.
US06446832 1981-12-28 1982-12-03 Process for preparation of microporous membranes of controlled flow characteristics Pending UST103601I4 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US33477181 true 1981-12-28 1981-12-28
US06446832 UST103601I4 (en) 1981-12-28 1982-12-03 Process for preparation of microporous membranes of controlled flow characteristics

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06446832 UST103601I4 (en) 1981-12-28 1982-12-03 Process for preparation of microporous membranes of controlled flow characteristics

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US33477181 Continuation 1981-12-28 1981-12-28

Publications (1)

Publication Number Publication Date
UST103601I4 true UST103601I4 (en) 1983-11-01

Family

ID=26989376

Family Applications (1)

Application Number Title Priority Date Filing Date
US06446832 Pending UST103601I4 (en) 1981-12-28 1982-12-03 Process for preparation of microporous membranes of controlled flow characteristics

Country Status (1)

Country Link
US (1) UST103601I4 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100155323A1 (en) * 2008-12-23 2010-06-24 Weiss Douglas E Functionalized nonwoven article
US8329034B2 (en) 2009-06-23 2012-12-11 3M Innovative Properties Company Functionalized nonwoven article
US8377672B2 (en) 2010-02-18 2013-02-19 3M Innovative Properties Company Ligand functionalized polymers
US8435776B2 (en) 2010-03-03 2013-05-07 3M Innovative Properties Company Ligand functionalized polymers
US8586338B2 (en) 2008-05-30 2013-11-19 3M Innovative Properties Company Ligand functionalized substrates
US8652582B2 (en) 2008-05-30 2014-02-18 3M Innovative Properties Company Method of making ligand functionalized substrates
US10005814B2 (en) 2017-05-10 2018-06-26 3M Innovative Properties Company Ligand functionalized polymers

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8586338B2 (en) 2008-05-30 2013-11-19 3M Innovative Properties Company Ligand functionalized substrates
US9650470B2 (en) 2008-05-30 2017-05-16 3M Innovative Properties Company Method of making ligand functionalized substrates
US8846203B2 (en) 2008-05-30 2014-09-30 3M Innovative Properties Company Method of making ligand functionalized substrates
US8652582B2 (en) 2008-05-30 2014-02-18 3M Innovative Properties Company Method of making ligand functionalized substrates
US8328023B2 (en) 2008-12-23 2012-12-11 3M Innovative Properties Company Functionalized nonwoven article
US20100155323A1 (en) * 2008-12-23 2010-06-24 Weiss Douglas E Functionalized nonwoven article
US9259689B2 (en) 2009-06-23 2016-02-16 3M Innovative Properties Company Functionalized nonwoven article
US8329034B2 (en) 2009-06-23 2012-12-11 3M Innovative Properties Company Functionalized nonwoven article
US8377672B2 (en) 2010-02-18 2013-02-19 3M Innovative Properties Company Ligand functionalized polymers
US8945896B2 (en) 2010-02-18 2015-02-03 3M Innovative Properties Company Ligand functionalized polymers
US9296847B2 (en) 2010-02-18 2016-03-29 3M Innovative Properties Company Ligand functionalized polymers
US8435776B2 (en) 2010-03-03 2013-05-07 3M Innovative Properties Company Ligand functionalized polymers
US9758547B2 (en) 2010-03-03 2017-09-12 3M Innovative Properties Company Ligand functionalized polymers
US10005814B2 (en) 2017-05-10 2018-06-26 3M Innovative Properties Company Ligand functionalized polymers

Similar Documents

Publication Publication Date Title
US3648845A (en) Thin film separation membranes and processes for making same
US3335545A (en) Gas separation by differential permeation
US5354470A (en) Porous polypropylene membrane and method for production thereof
US5130025A (en) Membrane separation and purification of compounds
US5059659A (en) Surface treatments to impart hydrophilicity
US4527999A (en) Separation membrane and method of preparing and using same
US4460563A (en) Process for preparing microcapsules in a liquid vehicle
US6177011B1 (en) Composite reverse osmosis membrane having a separation layer with polyvinyl alcohol coating and method of reverse osmotic treatment of water using the same
US5919370A (en) Integral, multi-asymmetric, semi-permeable membrane
US3808305A (en) Crosslinked,interpolymer fixed-charge membranes
US4177228A (en) Method of production of a micro-porous membrane for filtration plants
US5342521A (en) Reverse osmosis or nanofiltration membrane and its production process
US4758343A (en) Interfacially synthesized reverse osmosis membrane
Bungay Synthetic Membranes:: Science, Engineering and Applications
US4147745A (en) Process for producing semipermeable membranes
US5079272A (en) Porous membrane formed from interpenetrating polymer network having hydrophilic surface
US3549016A (en) Permeable membrane and method of making and using the same
US4029582A (en) Poly(arylether-sulfone) semipermeable membrane comprising substituted halomethyl and/or quaternary nitrogen groups
US4012324A (en) Crosslinked, interpolymer fixed-charge membranes
Pusch et al. Synthetic membranes—preparation, structure, and application
US4976859A (en) Integral asymmetric polyether-sulfone membrane, process for its production, and use for ultrafiltration and microfiltration
US6013688A (en) PVDF microporous membrane and method
US4806291A (en) Process for preparing microporous polyvinylidene fluoride membranes
US5096637A (en) Membrane, process and system for isolating virus from solution
US5240615A (en) Composite membrane composed of microporous polyvinylidene difluoride membrane laminated to porous support and process for its preparation