GB573306A - Improvements in the manufacture of cellular polymerised ethylene - Google Patents

Improvements in the manufacture of cellular polymerised ethylene

Info

Publication number
GB573306A
GB573306A GB841441A GB841441A GB573306A GB 573306 A GB573306 A GB 573306A GB 841441 A GB841441 A GB 841441A GB 841441 A GB841441 A GB 841441A GB 573306 A GB573306 A GB 573306A
Authority
GB
United Kingdom
Prior art keywords
cellular
point
polymer
solubility
manufacture
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
GB841441A
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.)
Callenders Cable and Construction Co Ltd
Original Assignee
Callenders Cable and Construction Co Ltd
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 Callenders Cable and Construction Co Ltd filed Critical Callenders Cable and Construction Co Ltd
Priority to GB841441A priority Critical patent/GB573306A/en
Publication of GB573306A publication Critical patent/GB573306A/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
    • C08J9/12—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 physical blowing agent
    • C08J9/122—Hydrogen, oxygen, CO2, nitrogen or noble gases
    • 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
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/04—Homopolymers or copolymers of ethene
    • C08J2323/06—Polyethene

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)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)

Abstract

Solid polymerized ethylene is converted into cellular form by subjecting the polymer to the action of carbon dioxide under pressure while at a temperature between the softening and the solubility points, whereby the polymer is caused to absorb a proportion of the gas, then releasing the pressure quickly and then cooling the material below the solubility point. The solubility point is defined as a temperature from 30-40 DEG C. below the softening point and is characterized in that below this point the polymer is practically insoluble in any solvent. The cellular product is used as dielectric material.
GB841441A 1941-07-03 1941-07-03 Improvements in the manufacture of cellular polymerised ethylene Expired GB573306A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB841441A GB573306A (en) 1941-07-03 1941-07-03 Improvements in the manufacture of cellular polymerised ethylene

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB841441A GB573306A (en) 1941-07-03 1941-07-03 Improvements in the manufacture of cellular polymerised ethylene

Publications (1)

Publication Number Publication Date
GB573306A true GB573306A (en) 1945-11-15

Family

ID=9852072

Family Applications (1)

Application Number Title Priority Date Filing Date
GB841441A Expired GB573306A (en) 1941-07-03 1941-07-03 Improvements in the manufacture of cellular polymerised ethylene

Country Status (1)

Country Link
GB (1) GB573306A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE963623C (en) * 1950-03-10 1957-05-09 Sueddeutsche Kabelwerke Zweign Cables or electrical lines whose insulation is made of foam strips
DE1092649B (en) * 1956-11-08 1960-11-10 Ruhrchemie Ag Process for the production of porous molded articles from polypropylene
EP0113903A2 (en) * 1982-12-20 1984-07-25 Japan Styrene Paper Corporation Process for producing prefoamed polymer particles

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE963623C (en) * 1950-03-10 1957-05-09 Sueddeutsche Kabelwerke Zweign Cables or electrical lines whose insulation is made of foam strips
DE1092649B (en) * 1956-11-08 1960-11-10 Ruhrchemie Ag Process for the production of porous molded articles from polypropylene
EP0113903A2 (en) * 1982-12-20 1984-07-25 Japan Styrene Paper Corporation Process for producing prefoamed polymer particles
EP0113903A3 (en) * 1982-12-20 1985-06-19 Japan Styrene Paper Corporation Process for producing prefoamed polymer particles

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