GB652696A - Light and stable thermoplastic base products made up of closed polyhedral cells, and a method of manufacturing the same - Google Patents

Light and stable thermoplastic base products made up of closed polyhedral cells, and a method of manufacturing the same

Info

Publication number
GB652696A
GB652696A GB4828/48A GB482848A GB652696A GB 652696 A GB652696 A GB 652696A GB 4828/48 A GB4828/48 A GB 4828/48A GB 482848 A GB482848 A GB 482848A GB 652696 A GB652696 A GB 652696A
Authority
GB
United Kingdom
Prior art keywords
heating
manufacturing
light
polyhedral cells
same
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
GB4828/48A
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.)
Equip Menager Et Ind E M I L
Original Assignee
Equip Menager Et Ind E M I L
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 Equip Menager Et Ind E M I L filed Critical Equip Menager Et Ind E M I L
Publication of GB652696A publication Critical patent/GB652696A/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
    • C08J9/04—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

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)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

Thermoplastic polycellular products having closed polyhedral cells are obtained by making a reduced scale pattern of the desired shape, heating, introducing gas under pressure into the mixture forming the pattern at a temperature near that at which gelatinization commences, increasing the volume by 10 to 30 per cent by a reduction of pressure, gelatinizing by heating, cooling to ambient temperature, and then heating till the material softens sufficiently to expand and form a polycellular product. The gas producing agent may be diazoaminobenzene or azoisobutyric acid dinitrile. In examples: (1) polystyrol, (2) and (3) polyvinyl chloride, and (4) polyvinyl acetal, are treated together with an appropriate gas producing agent in the moulds described in Group V.
GB4828/48A 1947-02-18 1948-02-18 Light and stable thermoplastic base products made up of closed polyhedral cells, and a method of manufacturing the same Expired GB652696A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR652696X 1947-02-18

Publications (1)

Publication Number Publication Date
GB652696A true GB652696A (en) 1951-05-02

Family

ID=9005387

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4828/48A Expired GB652696A (en) 1947-02-18 1948-02-18 Light and stable thermoplastic base products made up of closed polyhedral cells, and a method of manufacturing the same

Country Status (1)

Country Link
GB (1) GB652696A (en)

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