GB649646A - Improvements in and relating to the production of porous bodies - Google Patents

Improvements in and relating to the production of porous bodies

Info

Publication number
GB649646A
GB649646A GB3242/48A GB324248A GB649646A GB 649646 A GB649646 A GB 649646A GB 3242/48 A GB3242/48 A GB 3242/48A GB 324248 A GB324248 A GB 324248A GB 649646 A GB649646 A GB 649646A
Authority
GB
United Kingdom
Prior art keywords
salt
toluol
benzol
petrol
accepted
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
GB3242/48A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB649646A publication Critical patent/GB649646A/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/26Working-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

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)
  • Processes Of Treating Macromolecular Substances (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

Soft, elastic, porous bodies are made by mixing polyvinyl chloride and a softening-agent, e.g. dibutyl phthalate, dioctyl phthalate, dibutyl sebacate, or tricresyl phosphate, with at least twice the volume of these substances of a soluble granular salt, e.g. sodium chloride, the smallest particle of which is 0.5 mm. or more in size and the largest particle is not more than 5.0 mm., the mix being shaped and set by heating, and the salt being then removed by lixiviation. The polyvinyl chloride should be of such a consistency that the salt is not crushed during mixing. Polymerizable substances, e.g. methyl methacrylate, styrol or chloroprene, and catalysts, e.g. peroxides, aluminium chloride, or boron trifluoride may be added. The Specification as open to inspection under Sect. 91 comprises also the use of polystyrene, polyacrylates, polyallyl esters, polybutadiene and polychloroprene and solvents, e.g. benzol, toluol, petrol and carbon tetrachloride. This subject-matter does not appear in the Specification as accepted.ALSO:The Specification as open to inspection under Sect. 91 comprises the production of porous natural or artificial rubber by incorporating in a solution thereof in benzol, toluol, petrol, or carbon tetrachloride, a water-soluble salt such as sodium chloride which is insoluble in the rubber solvent, the size of the largest of the grains of the salt being less than 10, and preferably less than 5 times that of the smallest. This subject-matter does not appear in the Specification as accepted.
GB3242/48A 1947-02-11 1948-02-04 Improvements in and relating to the production of porous bodies Expired GB649646A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE649646X 1947-02-11

Publications (1)

Publication Number Publication Date
GB649646A true GB649646A (en) 1951-01-31

Family

ID=20314016

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3242/48A Expired GB649646A (en) 1947-02-11 1948-02-04 Improvements in and relating to the production of porous bodies

Country Status (1)

Country Link
GB (1) GB649646A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3375209A (en) * 1964-05-25 1968-03-26 Charles R. Kemper Porous film and method of making
US3379658A (en) * 1964-05-25 1968-04-23 Charles R. Kemper Porous film and method of making

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3375209A (en) * 1964-05-25 1968-03-26 Charles R. Kemper Porous film and method of making
US3379658A (en) * 1964-05-25 1968-04-23 Charles R. Kemper Porous film and method of making

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