GB2319028B - Granular-type polytetrafluoroethylene dispersions and fused articles prepared therefrom - Google Patents

Granular-type polytetrafluoroethylene dispersions and fused articles prepared therefrom

Info

Publication number
GB2319028B
GB2319028B GB9710007A GB9710007A GB2319028B GB 2319028 B GB2319028 B GB 2319028B GB 9710007 A GB9710007 A GB 9710007A GB 9710007 A GB9710007 A GB 9710007A GB 2319028 B GB2319028 B GB 2319028B
Authority
GB
United Kingdom
Prior art keywords
granular
prepared therefrom
articles prepared
type polytetrafluoroethylene
polytetrafluoroethylene dispersions
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.)
Expired - Fee Related
Application number
GB9710007A
Other languages
English (en)
Other versions
GB2319028A (en
GB9710007D0 (enrdf_load_stackoverflow
Inventor
Norman Ernest Clough
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.)
WL Gore and Associates UK Ltd
WL Gore and Associates Inc
Original Assignee
WL Gore and Associates UK Ltd
WL Gore and Associates 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
Priority claimed from GBGB9606819.2A external-priority patent/GB9606819D0/en
Application filed by WL Gore and Associates UK Ltd, WL Gore and Associates Inc filed Critical WL Gore and Associates UK Ltd
Priority to GB9710007A priority Critical patent/GB2319028B/en
Publication of GB9710007D0 publication Critical patent/GB9710007D0/en
Publication of GB2319028A publication Critical patent/GB2319028A/en
Application granted granted Critical
Publication of GB2319028B publication Critical patent/GB2319028B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • C08J9/24—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof by surface fusion and bonding of particles to form voids, e.g. sintering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
    • B01D39/1638—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being particulate
    • B01D39/1653—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being particulate of synthetic origin
    • B01D39/1661—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being particulate of synthetic origin sintered or bonded
    • 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
    • B01D67/0004—Organic membrane manufacture by agglomeration of particles
    • B01D67/00041—Organic membrane manufacture by agglomeration of particles by sintering
    • 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
    • B01D71/30—Polyalkenyl halides
    • B01D71/32—Polyalkenyl halides containing fluorine atoms
    • B01D71/36—Polytetrafluoroethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
    • C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L27/12—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
    • C08L27/18—Homopolymers or copolymers or tetrafluoroethene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/04—Additives and treatments of the filtering material
    • B01D2239/0471—Surface coating material
    • B01D2239/0478—Surface coating material on a layer of the filter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/10—Filtering material manufacturing
    • 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
    • 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
    • C08J2327/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
    • C08J2327/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
    • C08J2327/12—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
    • C08J2327/18—Homopolymers or copolymers of tetrafluoroethylene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
    • C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L27/12—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Polymers & Plastics (AREA)
  • Manufacturing & Machinery (AREA)
  • Thermal Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Moulding By Coating Moulds (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
GB9710007A 1996-03-30 1997-04-01 Granular-type polytetrafluoroethylene dispersions and fused articles prepared therefrom Expired - Fee Related GB2319028B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9710007A GB2319028B (en) 1996-03-30 1997-04-01 Granular-type polytetrafluoroethylene dispersions and fused articles prepared therefrom

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GBGB9606819.2A GB9606819D0 (en) 1996-03-30 1996-03-30 Granular-type polytetrafluoroethylene dispersions and fused articles prepared therefrom (Case B)
PCT/GB1997/000921 WO1997036954A1 (en) 1996-03-30 1997-04-01 Granular-type polytetrafluoroethylene dispersions and fused articles prepared therefrom
GB9710007A GB2319028B (en) 1996-03-30 1997-04-01 Granular-type polytetrafluoroethylene dispersions and fused articles prepared therefrom

Publications (3)

Publication Number Publication Date
GB9710007D0 GB9710007D0 (enrdf_load_stackoverflow) 1997-07-09
GB2319028A GB2319028A (en) 1998-05-13
GB2319028B true GB2319028B (en) 2000-03-15

Family

ID=26309038

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9710007A Expired - Fee Related GB2319028B (en) 1996-03-30 1997-04-01 Granular-type polytetrafluoroethylene dispersions and fused articles prepared therefrom

Country Status (1)

Country Link
GB (1) GB2319028B (enrdf_load_stackoverflow)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4856580A (enrdf_load_stackoverflow) * 1971-11-19 1973-08-08
EP0369466A2 (en) * 1988-11-18 1990-05-23 Daikin Industries, Limited Preparation of a porous film of polytetrafluoroethylene
EP0450894A1 (en) * 1990-03-31 1991-10-09 W.L. GORE & ASSOCIATES (UK) LTD Porous PTFE structures
US5154866A (en) * 1991-04-04 1992-10-13 Daikin Industries, Ltd. Molding process for preparing porous polytetrafluoroethylene articles

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4856580A (enrdf_load_stackoverflow) * 1971-11-19 1973-08-08
EP0369466A2 (en) * 1988-11-18 1990-05-23 Daikin Industries, Limited Preparation of a porous film of polytetrafluoroethylene
EP0450894A1 (en) * 1990-03-31 1991-10-09 W.L. GORE & ASSOCIATES (UK) LTD Porous PTFE structures
US5154866A (en) * 1991-04-04 1992-10-13 Daikin Industries, Ltd. Molding process for preparing porous polytetrafluoroethylene articles

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
WPI Abstract Accession No. 73-66422U & JP 48 056580 A *

Also Published As

Publication number Publication date
GB2319028A (en) 1998-05-13
GB9710007D0 (enrdf_load_stackoverflow) 1997-07-09

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20010401