GB807405A - Chemical compositions useful as blowing agents - Google Patents
Chemical compositions useful as blowing agentsInfo
- 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
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.
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) |
-
1955
- 1955-06-16 GB GB1733355A patent/GB807405A/en not_active Expired
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