WO1999032204A3 - Permeable compositions and methods for their preparation - Google Patents

Permeable compositions and methods for their preparation Download PDF

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Publication number
WO1999032204A3
WO1999032204A3 PCT/US1998/027351 US9827351W WO9932204A3 WO 1999032204 A3 WO1999032204 A3 WO 1999032204A3 US 9827351 W US9827351 W US 9827351W WO 9932204 A3 WO9932204 A3 WO 9932204A3
Authority
WO
WIPO (PCT)
Prior art keywords
pore
mixture
forming agent
compositions
variable
Prior art date
Application number
PCT/US1998/027351
Other languages
French (fr)
Other versions
WO1999032204A2 (en
Inventor
C Mauli Agrawal
Kyriacos A Athanasiou
Original Assignee
Univ Texas
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
Application filed by Univ Texas filed Critical Univ Texas
Priority to AU20914/99A priority Critical patent/AU2091499A/en
Publication of WO1999032204A2 publication Critical patent/WO1999032204A2/en
Publication of WO1999032204A3 publication Critical patent/WO1999032204A3/en

Links

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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
    • A61L27/14—Macromolecular materials
    • A61L27/18—Macromolecular materials obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
    • A61L27/50—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
    • A61L27/56—Porous materials, e.g. foams or sponges
    • 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
    • B01D67/0023—Organic membrane manufacture by inducing porosity into non porous precursor membranes
    • B01D67/003—Organic membrane manufacture by inducing porosity into non porous precursor membranes by selective elimination of components, e.g. by leaching
    • 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
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • B29C67/20—Shaping 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
    • B29C67/202—Shaping 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
    • 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
    • C08J9/26—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof by elimination of a solid phase from a macromolecular composition or article, e.g. leaching out
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2323/00—Details relating to membrane preparation
    • B01D2323/06—Specific viscosities of materials involved
    • 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
    • B01D2323/00—Details relating to membrane preparation
    • B01D2323/15—Use of additives
    • B01D2323/18—Pore-control agents or pore formers

Abstract

The present invention involves compositions having variable permeation and/or porosity and objects made therefrom. The compositions are prepared by dispersing a pore-forming agent in a polymer matrix by agitation. The composition is density developed resulting in a variable concentration in pore-forming agent throughout the mixture through application of an external force on the mixture with or without continued agitation. The pore-forming agent is then leached from the mixture to form a polymer matrix having variable permeability and/or porosity.
PCT/US1998/027351 1997-12-23 1998-12-22 Permeable compositions and methods for their preparation WO1999032204A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU20914/99A AU2091499A (en) 1997-12-23 1998-12-22 Permeable compositions and methods for their preparation

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/996,745 1997-12-23
US08/996,745 US6255359B1 (en) 1997-12-23 1997-12-23 Permeable compositions and methods for their preparation

Publications (2)

Publication Number Publication Date
WO1999032204A2 WO1999032204A2 (en) 1999-07-01
WO1999032204A3 true WO1999032204A3 (en) 1999-09-23

Family

ID=25543255

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1998/027351 WO1999032204A2 (en) 1997-12-23 1998-12-22 Permeable compositions and methods for their preparation

Country Status (3)

Country Link
US (1) US6255359B1 (en)
AU (1) AU2091499A (en)
WO (1) WO1999032204A2 (en)

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US20050177237A1 (en) * 2001-04-12 2005-08-11 Ben Shappley Spinal cage insert, filler piece and method of manufacturing
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US7491234B2 (en) 2002-12-03 2009-02-17 Boston Scientific Scimed, Inc. Medical devices for delivery of therapeutic agents
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WO2005077304A1 (en) 2004-02-06 2005-08-25 Georgia Tech Research Corporation Load bearing biocompatible device
US20070213424A1 (en) * 2004-03-22 2007-09-13 Chandrasekaran Margam Method for Obtaining Graded Pore Structure in Scaffolds for Tissues and Bone, and Scaffolds with Graded Pore Structures for Tissue and Bone
US7297753B2 (en) * 2004-07-20 2007-11-20 Raytheon Company Reduction of permeation through a polymer
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KR101189758B1 (en) 2010-05-04 2012-10-10 서울시립대학교 산학협력단 Method for porous film using microwave and porous film
ES2478966T3 (en) 2010-10-26 2014-07-23 Dow Global Technologies Llc Spiral wound module that includes a membrane sheet with regions that have different permeabilities
EP2476724A1 (en) * 2011-01-17 2012-07-18 ETH Zurich Pourous polymer membranes
CA3048443C (en) 2011-05-26 2021-01-05 Cartiva, Inc. Tapered joint implant and related tools
WO2014040171A1 (en) * 2012-09-11 2014-03-20 Universite Laval Microporous and hydrophobic polymeric hollow fiber membranes and methods for preparation thereof
US10017651B2 (en) 2013-05-02 2018-07-10 Empire Technology Development Llc Composition of hydrophilic painted surface
US9776142B2 (en) * 2014-02-28 2017-10-03 Pall Corporation Porous polymeric membrane with high void volume
US9737860B2 (en) * 2014-02-28 2017-08-22 Pall Corporation Hollow fiber membrane having hexagonal voids
US9561473B2 (en) * 2014-02-28 2017-02-07 Pall Corporation Charged hollow fiber membrane having hexagonal voids
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Also Published As

Publication number Publication date
WO1999032204A2 (en) 1999-07-01
AU2091499A (en) 1999-07-12
US6255359B1 (en) 2001-07-03

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