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GB1328525A - Process for preparing foamed olefin polymers or chlorinated products thereof - Google Patents

Process for preparing foamed olefin polymers or chlorinated products thereof

Info

Publication number
GB1328525A
GB1328525A GB4656370A GB4656370A GB1328525A GB 1328525 A GB1328525 A GB 1328525A GB 4656370 A GB4656370 A GB 4656370A GB 4656370 A GB4656370 A GB 4656370A GB 1328525 A GB1328525 A GB 1328525A
Authority
GB
United Kingdom
Prior art keywords
foamed
product
foaming
foaming agent
chlorinated
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
GB4656370A
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.)
Sanwa Kako Co Ltd
Original Assignee
Sanwa Kako 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 Sanwa Kako Co Ltd filed Critical Sanwa Kako Co Ltd
Publication of GB1328525A publication Critical patent/GB1328525A/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
    • C08J9/06—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 chemical blowing agent
    • C08J9/10—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 chemical blowing agent developing nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • General 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

1328525 Foamed olefine and chlorinated olefine polymers SANWA KAKO CO Ltd 30 Sept 1970 [4 Oct 1969] 46563/70 Heading C3C A foamed olefin polymer or chlorinated product thereof having a chlorine content of up to 65% by wt. is made by providing a foaming composition containing the olefin polymer, or chlorinated product thereof, a heat-decomposable solid foaming agent having a decomposition point above the melting point of the polymer or chlorinated product, and a cross-linking agent; heating the foaming composition in a closed mold under superatmospheric pressure until there is obtained a primary foamed product containing undecomposed foaming agent in an amount of from 40 to 85% by weight of the original quantity of foaming agent and crosslinked to a degree sufficient to prevent rupture of the formed cells upon release of said superatmospheric pressure at an elevated temperature; heating the primary foamed product at atmospheric pressure to decompose from 90 to 95% by weight of the undecomposed foaming agent in the primary foamed product; allowing the secondary foamed product thereby obtained to stand at atmospheric pressure and ambient temperature for a time sufficient to decompose the remaining undecomposed foaming agent. In the examples polyethylene or an ethylene/ vinyl acetate copolymer was foamed, as above, using azodicarbonamide as a blowing agent together with urea as a foaming assistant and alpha-dicumyl peroxide as the cross-linking agent.
GB4656370A 1969-10-04 1970-09-30 Process for preparing foamed olefin polymers or chlorinated products thereof Expired GB1328525A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7911569 1969-10-04

Publications (1)

Publication Number Publication Date
GB1328525A true GB1328525A (en) 1973-08-30

Family

ID=13680898

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4656370A Expired GB1328525A (en) 1969-10-04 1970-09-30 Process for preparing foamed olefin polymers or chlorinated products thereof

Country Status (4)

Country Link
BE (1) BE747863A (en)
DE (1) DE2038506C2 (en)
GB (1) GB1328525A (en)
NL (1) NL165195C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4671910A (en) * 1984-08-16 1987-06-09 Dynamit Nobel Aktiengesellschaft Process for the production of closed-cell foam molded articles of crosslinked polyolefin

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3098832A (en) * 1959-05-01 1963-07-23 Us Rubber Co Process for expanding polyethylene

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4671910A (en) * 1984-08-16 1987-06-09 Dynamit Nobel Aktiengesellschaft Process for the production of closed-cell foam molded articles of crosslinked polyolefin

Also Published As

Publication number Publication date
DE2038506C2 (en) 1983-06-01
NL165195B (en) 1980-10-15
NL7006675A (en) 1971-04-06
NL165195C (en) 1981-03-16
BE747863A (en) 1970-08-31
DE2038506A1 (en) 1971-04-29

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years