GB948063A - Foamed polymers of vinyl aromatic hydrocarbons - Google Patents

Foamed polymers of vinyl aromatic hydrocarbons

Info

Publication number
GB948063A
GB948063A GB2117460A GB2117460A GB948063A GB 948063 A GB948063 A GB 948063A GB 2117460 A GB2117460 A GB 2117460A GB 2117460 A GB2117460 A GB 2117460A GB 948063 A GB948063 A GB 948063A
Authority
GB
United Kingdom
Prior art keywords
polymer
rays
expanding agent
monomer
styrene
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
GB2117460A
Inventor
Louis Charles Rubens
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.)
Dow Chemical Co
Original Assignee
Dow Chemical 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 Dow Chemical Co filed Critical Dow Chemical Co
Priority to GB2117460A priority Critical patent/GB948063A/en
Publication of GB948063A publication Critical patent/GB948063A/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
    • 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
    • C08J2325/00—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 an aromatic carbocyclic ring; Derivatives of such polymers
    • C08J2325/02—Homopolymers or copolymers of hydrocarbons
    • C08J2325/04—Homopolymers or copolymers of styrene

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)
  • Processes Of Treating Macromolecular Substances (AREA)

Abstract

A composition of thermoplastic polymer and expanding agent is heated above the softening point of the polymer and the boiling point of the expanding agent and is subjected to a dose of ionizing radiation sufficient to cause slight cross-linking without rendering the polymer non-swellable in organic solvents The polymer is derived from a monomer or monomer misten containing at least 70% by weight of monovinyl aromatic hydrocarbon. Examples are polystyrene polyvinyltoluene or a copolymer of styrene or vinyltoluene with another monomer such as acrylonitrile, methyl methacrylate or a -methyl styrene. The expanding agent is carbon dioxide or a volatile organic compound boiling below 100 DEG C., e.g. ethylene, propylene, pentane, hexane, heptam, petroleum ether, dichlorodifluoromethane, monochlorodifluoromethane, or symdichloro-tetra-fluoroethane, The ionizing radiation may be b -rays, g -rays, acclerated electrons, neutrons, heavy particles or X-rays. Generally a dose of 5-300 megareps is satisfactory. In examples (1) Styrene mixed with dichlorodifluoro-methane was polymerized with benzoyl peroxide to a solid product, granules of which were irradiated with electrons from a Van de Graaff accelerator and then foamed by immersion in a silicone oil bath at 130 DEG C. (2) is similar, using vinyl toluene. (3) Polystyrene granules were irradiated, treated at room temperature with carbon dixoide under pressure and foamed by heating (4) is similar to (3) using polyvinyltoluene.
GB2117460A 1960-06-16 1960-06-16 Foamed polymers of vinyl aromatic hydrocarbons Expired GB948063A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2117460A GB948063A (en) 1960-06-16 1960-06-16 Foamed polymers of vinyl aromatic hydrocarbons

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2117460A GB948063A (en) 1960-06-16 1960-06-16 Foamed polymers of vinyl aromatic hydrocarbons

Publications (1)

Publication Number Publication Date
GB948063A true GB948063A (en) 1964-01-29

Family

ID=10158412

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2117460A Expired GB948063A (en) 1960-06-16 1960-06-16 Foamed polymers of vinyl aromatic hydrocarbons

Country Status (1)

Country Link
GB (1) GB948063A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0113903A2 (en) * 1982-12-20 1984-07-25 Japan Styrene Paper Corporation Process for producing prefoamed polymer particles

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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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