GB1393680A - Porous plastics materials - Google Patents

Porous plastics materials

Info

Publication number
GB1393680A
GB1393680A GB5443271A GB5443271A GB1393680A GB 1393680 A GB1393680 A GB 1393680A GB 5443271 A GB5443271 A GB 5443271A GB 5443271 A GB5443271 A GB 5443271A GB 1393680 A GB1393680 A GB 1393680A
Authority
GB
United Kingdom
Prior art keywords
vinyl chloride
polymer
porous
nov
extruding
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
Application number
GB5443271A
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.)
UK Atomic Energy Authority
Original Assignee
UK Atomic Energy Authority
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 UK Atomic Energy Authority filed Critical UK Atomic Energy Authority
Priority to GB5443271A priority Critical patent/GB1393680A/en
Priority to CA155,962A priority patent/CA1023116A/en
Priority to ZA727949A priority patent/ZA727949B/en
Priority to IL40794A priority patent/IL40794A/en
Priority to AU48837/72A priority patent/AU468292B2/en
Priority to DE2256036A priority patent/DE2256036C3/en
Priority to FR7241526A priority patent/FR2160973B1/fr
Priority to IT70680/72A priority patent/IT975828B/en
Priority to NL7215897A priority patent/NL7215897A/xx
Priority to JP47117868A priority patent/JPS4860155A/ja
Publication of GB1393680A publication Critical patent/GB1393680A/en
Priority to US05/633,560 priority patent/US4100064A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • B01D69/10—Supported membranes; Membrane supports
    • B01D69/107—Organic support material
    • 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
    • B01D69/10—Supported membranes; Membrane supports
    • 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
    • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
    • 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
    • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
    • C08J9/10—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
    • 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
    • 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
    • C08J2327/04—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 chlorine atoms
    • C08J2327/06—Homopolymers or copolymers of vinyl chloride

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

1393680 Extruding porous pipe UNITED KINGDOM ATOMIC ENERGY AUTHORITY 8 Nov 1972 [23 Nov 1971] 54432/71 Heading B5A [Also in Divisions C3 and B1] Extruded articles, e.g. tubes, consist of porous rigid ployvinylchloride, a copolymer of at least 90 molar per cent of vinyl chloride with a copolymerizable ethylenically unsaturated monomer or a blend of polyvinyl chloride with a vinyl chloride copolymer which blend contains at least 90 molar per cent of vinyl chloride units, the polymer being unplasticized, having an apparent density of 0À5-1À3 g./cc., an average pore diameter of 5-500 Á and at least 50% of the pores being interconnected. The porous polymers are made by extruding a mixture of the powdered polymer with 0À5 -3À0% by wt. of a chemical blowing agent, less than 10% by wt. of a stabilizer for the polymer and not more than 12% by wt. of a filler. The tube may be axially drawn when hot so as to reduce its diameter or may be drawn hot over a mechanical former so as to increase its porosity by radial expansion of the tube.
GB5443271A 1971-11-23 1971-11-23 Porous plastics materials Expired GB1393680A (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
GB5443271A GB1393680A (en) 1971-11-23 1971-11-23 Porous plastics materials
CA155,962A CA1023116A (en) 1971-11-23 1972-11-08 Porous plastics materials
ZA727949A ZA727949B (en) 1971-11-23 1972-11-09 Porous plastics materials
IL40794A IL40794A (en) 1971-11-23 1972-11-10 Porous plastics materials
AU48837/72A AU468292B2 (en) 1971-11-23 1972-11-14 Porous plastics materials
DE2256036A DE2256036C3 (en) 1971-11-23 1972-11-15 Carrier material for semipermeable membranes for water purification by reverse osmosis and method for purifying water using a semipermeable membrane present on a carrier material
FR7241526A FR2160973B1 (en) 1971-11-23 1972-11-22
IT70680/72A IT975828B (en) 1971-11-23 1972-11-22 PARTICULARLY LARLY POROUS PLASTIC MATERIAL POLYVINYL CHLORIDE RI GIDO POROUS
NL7215897A NL7215897A (en) 1971-11-23 1972-11-23
JP47117868A JPS4860155A (en) 1971-11-23 1972-11-24
US05/633,560 US4100064A (en) 1971-11-23 1975-11-19 Purification of water by reverse osmosis using a supported semi-permeable membrane

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5443271A GB1393680A (en) 1971-11-23 1971-11-23 Porous plastics materials

Publications (1)

Publication Number Publication Date
GB1393680A true GB1393680A (en) 1975-05-07

Family

ID=10470982

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5443271A Expired GB1393680A (en) 1971-11-23 1971-11-23 Porous plastics materials

Country Status (10)

Country Link
JP (1) JPS4860155A (en)
AU (1) AU468292B2 (en)
CA (1) CA1023116A (en)
DE (1) DE2256036C3 (en)
FR (1) FR2160973B1 (en)
GB (1) GB1393680A (en)
IL (1) IL40794A (en)
IT (1) IT975828B (en)
NL (1) NL7215897A (en)
ZA (1) ZA727949B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2131341A (en) * 1982-10-23 1984-06-20 Skf Kugellagerfabriken Gmbh Plastics components of or for bearings
US4577998A (en) * 1981-10-22 1986-03-25 Imperial Chemical Industries, Plc Production of PVC irrigation pipe and the pipe so produced

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB749733A (en) * 1953-12-15 1956-05-30 Harold Newby Improvements in the production of cellular bodies from polyvinyl chloride
GB1074466A (en) * 1965-07-07 1967-07-05 Ici Ltd Expanded plastic materials
GB1219803A (en) * 1967-06-03 1971-01-20 Toray Industries Cellular foamed products prepared from polymers of vinyl chloride and process for their preparation
SE332072B (en) * 1968-04-22 1971-01-25 Kema Nord Ab

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4577998A (en) * 1981-10-22 1986-03-25 Imperial Chemical Industries, Plc Production of PVC irrigation pipe and the pipe so produced
GB2131341A (en) * 1982-10-23 1984-06-20 Skf Kugellagerfabriken Gmbh Plastics components of or for bearings

Also Published As

Publication number Publication date
FR2160973A1 (en) 1973-07-06
IL40794A0 (en) 1973-01-30
AU4883772A (en) 1974-05-16
IL40794A (en) 1975-10-15
NL7215897A (en) 1973-05-25
FR2160973B1 (en) 1976-06-04
DE2256036C3 (en) 1982-01-21
CA1023116A (en) 1977-12-27
JPS4860155A (en) 1973-08-23
IT975828B (en) 1974-08-10
AU468292B2 (en) 1976-01-08
DE2256036A1 (en) 1973-05-24
DE2256036B2 (en) 1981-05-21
ZA727949B (en) 1973-07-25

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee