GB971567A - Process for the production of porous tubes - Google Patents

Process for the production of porous tubes

Info

Publication number
GB971567A
GB971567A GB2486562A GB2486562A GB971567A GB 971567 A GB971567 A GB 971567A GB 2486562 A GB2486562 A GB 2486562A GB 2486562 A GB2486562 A GB 2486562A GB 971567 A GB971567 A GB 971567A
Authority
GB
United Kingdom
Prior art keywords
salt
pvc
water
tubes
parts
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
GB2486562A
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.)
Shell Internationale Research Maatschappij BV
Original Assignee
Shell Internationale Research Maatschappij BV
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 Shell Internationale Research Maatschappij BV filed Critical Shell Internationale Research Maatschappij BV
Publication of GB971567A publication Critical patent/GB971567A/en
Expired 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
    • C08J9/26—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
    • 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)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (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

A process for the production of tubes by extrusion from polyvinyl chloride compositions, the tubes being porous or capable of being made porous, comprises using as starting material a composition of polyvinyl chloride and one or more elastomers and/or alkyd resins, the composition being mixed with a water-soluble salt and having an Izod impact value of at least 20 kg.cm./cm2 at 23 DEG C. sufficient salt being used for the extruded tube to be capable of being made porous by a leaching process. Immediately after the extrusion the diameter of the hot tube is preferably enlarged to facilitate removal of the salt and increase the porosity. The quantity of salt may vary from 5 to 80 parts per 100 parts of PVC composition. The salt is preferably wetted with water before use. In a table the results are given of tests applied to tubes of PVC and of PVC mixed with various proportions of rubber, and salt particles of 30-40 mesh. The rubber is a mixture of styrene. butadiene and acrylonitrile-butadiene rubbers. In an example 100 parts PVC of Izod impact value 50 kg.cm./cm2 with 25 parts sodium chloride (4% water-content) are blended, extruded as a tube, stretched while hot and cooled in water (which also leaches out some of the salt).
GB2486562A 1961-06-30 1962-06-28 Process for the production of porous tubes Expired GB971567A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL266557 1961-06-30

Publications (1)

Publication Number Publication Date
GB971567A true GB971567A (en) 1964-09-30

Family

ID=19753130

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2486562A Expired GB971567A (en) 1961-06-30 1962-06-28 Process for the production of porous tubes

Country Status (3)

Country Link
BE (1) BE619511A (en)
GB (1) GB971567A (en)
NL (1) NL266557A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4414168A (en) * 1980-11-24 1983-11-08 Esb Incorporated Process for manufacturing a porous dip tube
US4577998A (en) * 1981-10-22 1986-03-25 Imperial Chemical Industries, Plc Production of PVC irrigation pipe and the pipe so produced

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4414168A (en) * 1980-11-24 1983-11-08 Esb Incorporated Process for manufacturing a porous dip tube
US4577998A (en) * 1981-10-22 1986-03-25 Imperial Chemical Industries, Plc Production of PVC irrigation pipe and the pipe so produced

Also Published As

Publication number Publication date
NL266557A (en)
BE619511A (en)

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