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GB671786A - Process for making microporous articles from dispersions - Google Patents

Process for making microporous articles from dispersions

Info

Publication number
GB671786A
GB671786A GB12727/50A GB1272750A GB671786A GB 671786 A GB671786 A GB 671786A GB 12727/50 A GB12727/50 A GB 12727/50A GB 1272750 A GB1272750 A GB 1272750A GB 671786 A GB671786 A GB 671786A
Authority
GB
United Kingdom
Prior art keywords
drying
polychloroprene
dextrose
paste
fine particles
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
GB12727/50A
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.)
NCR Voyix Corp
National Cash Register Co
Original Assignee
NCR Corp
National Cash Register Co
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 NCR Corp, National Cash Register Co filed Critical NCR Corp
Publication of GB671786A publication Critical patent/GB671786A/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

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)

Abstract

Polyvinyl chloride, polyvinyl acetate, vinyl chloride-vinyl acetate copolymers, butadiene acrylonitrile copolymers, or polychloroprene are rendered porous by suspending fine particles of the polymeric material in a non-solvent fluid, adding fine particles of a leachable substance to the suspension in sufficient quantity to form a paste, drying the paste, and leaching out the leachable substance. In examples, a microporous product is obtained by suspending a vinyl chloride-vinyl acetate copolymer in either a mixture of xylol with diisobutyl ketone or tri-2-ethyl hexyl phosphate and then adding sodium nitrate, drying the mixture, consolidating by heat and then leaching out by running water; or polychloroprene in latex form is mixed with dextrose and after drying and heating to vulcanize the polymer, the dextrose is removed with running hot water.
GB12727/50A 1949-06-07 1950-05-22 Process for making microporous articles from dispersions Expired GB671786A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US671786XA 1949-06-07 1949-06-07

Publications (1)

Publication Number Publication Date
GB671786A true GB671786A (en) 1952-05-07

Family

ID=22074223

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12727/50A Expired GB671786A (en) 1949-06-07 1950-05-22 Process for making microporous articles from dispersions

Country Status (1)

Country Link
GB (1) GB671786A (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
US5970595A (en) * 1995-07-19 1999-10-26 Ncr Corporation Porous inking members for impact printers and methods of making the same

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
US5970595A (en) * 1995-07-19 1999-10-26 Ncr Corporation Porous inking members for impact printers and methods of making the same

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