GB807405A - Chemical compositions useful as blowing agents - Google Patents

Chemical compositions useful as blowing agents

Info

Publication number
GB807405A
GB807405A GB1733355A GB1733355A GB807405A GB 807405 A GB807405 A GB 807405A GB 1733355 A GB1733355 A GB 1733355A GB 1733355 A GB1733355 A GB 1733355A GB 807405 A GB807405 A GB 807405A
Authority
GB
United Kingdom
Prior art keywords
nitroso
urea
blowing agents
integer
hydrocarbon groups
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
GB1733355A
Inventor
Christopher Stanley Argyle
Eric Vero
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
Whiffen and Sons 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 Whiffen and Sons Ltd filed Critical Whiffen and Sons Ltd
Priority to GB1733355A priority Critical patent/GB807405A/en
Publication of GB807405A publication Critical patent/GB807405A/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
    • C08J9/107—Nitroso compounds
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D233/00—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings
    • C07D233/04—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member
    • C07D233/28—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D233/30—Oxygen or sulfur atoms
    • C07D233/32—One oxygen atom
    • C07D233/38—One oxygen atom with acyl radicals or hetero atoms directly attached to ring nitrogen atoms
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D233/00—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings
    • C07D233/04—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member
    • C07D233/28—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D233/30—Oxygen or sulfur atoms
    • C07D233/42—Sulfur atoms

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (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)
  • Compositions Of Macromolecular Compounds (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

Expanded thermoplastic materials are made by heating a mixture of the material and a nitroso-urea of the formula <FORM:0807405/IV (a)/1> or <FORM:0807405/IV (a)/2> wherein X is O or S, Y is nitroso, Z is H or nitroso, n is an integer, and R1, R2, R3 R4 are H or hydrocarbon groups. The nitroso-urea is mixed with the material, if desired as a dispersion or solution in a solvent which may be the monomer. Accelerators, fillers, plasticisers, other blowing agents, and starters or precursors such as thiosemicarbazide may also be present. The mixture may be heated under pressure. Suitable thermoplastic materials are polymers of styrene, vinyl compounds (e.g. chloride or acetate), acrylonitrile, butadiene, acrylates, methacrylates, epoxides and vinylidene chloride.ALSO:Nitroso-ureas of the formul <FORM:0807405/IV (b)/1> and <FORM:0807405/IV (b)/2> wherein X is O or S, Y is nitroso, Z is H or nitroso, R1, R2, R3, R4 are H or hydrocarbon groups, and n is an integer, are prepared by treating the corresponding amine with carbon dioxide, carbon disulphide, urea or thiourea, followed by nitrosation with nitrous acid. Examples show the nitrosation of ethylene-urea (mono- and di-), ethylene-thiourea and ethylenebis-urea.ALSO:Expanded rubber is made by heating rubber with a nitroso-urea of the formula:- <FORM:0807405/V/1> wherein X is O or S, Y is nitroso, Z is H or nitroso, n is an integer and R1R2R3R4 are H or hydrocarbon groups. The nitroso-urea is mixed with the rubber, if desired as a dispersion or solution in a solvent. Accelerators, fillers, plasticisers, other blowing agents, and starters or precursors such as thiosemicarbazide may also be present. The heating may take place under pressure.
GB1733355A 1955-06-16 1955-06-16 Chemical compositions useful as blowing agents Expired GB807405A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1733355A GB807405A (en) 1955-06-16 1955-06-16 Chemical compositions useful as blowing agents

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1733355A GB807405A (en) 1955-06-16 1955-06-16 Chemical compositions useful as blowing agents

Publications (1)

Publication Number Publication Date
GB807405A true GB807405A (en) 1959-01-14

Family

ID=10093332

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1733355A Expired GB807405A (en) 1955-06-16 1955-06-16 Chemical compositions useful as blowing agents

Country Status (1)

Country Link
GB (1) GB807405A (en)

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