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GB1123823A - Blowing agents - Google Patents

Blowing agents

Info

Publication number
GB1123823A
GB1123823A GB831865A GB831865A GB1123823A GB 1123823 A GB1123823 A GB 1123823A GB 831865 A GB831865 A GB 831865A GB 831865 A GB831865 A GB 831865A GB 1123823 A GB1123823 A GB 1123823A
Authority
GB
United Kingdom
Prior art keywords
azodicarbonamide
specified
blowing agent
sulphonhydrazides
substituted alkyl
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
GB831865A
Inventor
Ronald Arthur Reed
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.)
Fisons Industrial Chemicals Ltd
Original Assignee
Fisons Industrial Chemicals 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 Fisons Industrial Chemicals Ltd filed Critical Fisons Industrial Chemicals Ltd
Priority to GB831865A priority Critical patent/GB1123823A/en
Publication of GB1123823A publication Critical patent/GB1123823A/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
    • C08J9/102—Azo-compounds
    • C08J9/103—Azodicarbonamide

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

A blowing agent composition comprises a major proportion of azodicarbonamide and a minor proportion of an alkarylsulphonhydrazide of the formula <FORM:1123823/C3/1> where R1 to R5 are selected from hydrogen, alkyl and hydroxy or chloro-substituted alkyl, at least one being alkyl or substituted alkyl. Specified sulphonhydrazides, whose effect is to lower the decomposition temperature of the azodicarbonamide, are p-toluene-, o-toluene-, p-ethylphenyl -, and 2,4 - dimethylphenyl-sulphonhydrazides, and specified substituted alkyl groups are hydroxymethyl, hydroxyethyl and chloroethyl. Preferably the sulphonhydrazides are used in amounts of 10 to 50% of the weight of azodicarbonamide. Specified resins which may be expanded using this blowing agent are vinyl chloride, styrene, propylene, butadiene, chloroprene, and acrylonitrile polymers, and also rubbers and polyamides. The blowing agents are preferably used in amounts of 1 to 15% by weight of the polymer, and decompose at 160 DEG to 165 DEG C. Reference has been directed by the Comptroller to Specification 1,012,861.ALSO:A polymeric material, which is foamed using a blowing agent composition consisting of azodicarbonamide and an alkarylsulphonhydrazide, may be foamed by spreading a mixture of polymeric material and the blowing agent on a metal plate, a polyvinyl chloride sheet or a fabric backing, and heating either statically or on a moving belt passing through an oven. Specified polymeric materials are polymers of vinyl chloride, styrene, butadiene, chloroprene, propylene, acrylonitrile, acrylates and methacrylates and polyamides, and natural or synthetic rubbers. Reference has been directed by the Comptroller to Specification 1,012,861.
GB831865A 1965-02-26 1965-02-26 Blowing agents Expired GB1123823A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB831865A GB1123823A (en) 1965-02-26 1965-02-26 Blowing agents

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB831865A GB1123823A (en) 1965-02-26 1965-02-26 Blowing agents

Publications (1)

Publication Number Publication Date
GB1123823A true GB1123823A (en) 1968-08-14

Family

ID=9850239

Family Applications (1)

Application Number Title Priority Date Filing Date
GB831865A Expired GB1123823A (en) 1965-02-26 1965-02-26 Blowing agents

Country Status (1)

Country Link
GB (1) GB1123823A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0030333A1 (en) * 1979-12-06 1981-06-17 Bayer Ag Alkyldiphenyl-ether sulfonic acid hydrazides, their production and use as blowing agents
CN111925585A (en) * 2020-08-28 2020-11-13 辽宁鑫达滑石集团有限公司 Talcum powder filled foaming master batch and preparation method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0030333A1 (en) * 1979-12-06 1981-06-17 Bayer Ag Alkyldiphenyl-ether sulfonic acid hydrazides, their production and use as blowing agents
CN111925585A (en) * 2020-08-28 2020-11-13 辽宁鑫达滑石集团有限公司 Talcum powder filled foaming master batch and preparation method thereof

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