GB632208A - Improvements in or relating to the production of cellular materials from rubber, plastics and bituminous compositions - Google Patents
Improvements in or relating to the production of cellular materials from rubber, plastics and bituminous compositionsInfo
- Publication number
- GB632208A GB632208A GB562547A GB562547A GB632208A GB 632208 A GB632208 A GB 632208A GB 562547 A GB562547 A GB 562547A GB 562547 A GB562547 A GB 562547A GB 632208 A GB632208 A GB 632208A
- Authority
- GB
- United Kingdom
- Prior art keywords
- peroxide
- mass
- benzoyl peroxide
- blowing agent
- mixture
- 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
Abstract
A cellular structure is obtained in synthetic resinous materials capable of being softened by heat, excluding polythene, by incorporating into the material after mastication a blowing agent consisting of hydrogen peroxide or an organic peroxide, heating the mixture to a temperature sufficient to cause the blowing agent to form gas or vapour in a space permitting of limited expansion of the resinous mass, and while in the expanded state converting the mass into a rigid or elastic form. The organic peroxides may be urea peroxide, acetyl peroxide, or benzoyl peroxide. In examples (II) and (VIII) polyvinyl chloride plasticised with tricresyl phosphate is treated with benzoyl peroxide and acetyl peroxide and the mixture heated in moulds; (V) monomeric methyl methacrylate is partially polymerized in the presence of benzoyl peroxide and then potassium permanganate added to liberate oxygen and the polymerization completed; (IV) similarly styrene monomer is treated with a mixture of benzoyl peroxide and hydrogen peroxide; (VI) polyvinyl alcohol is treated with hydrogen peroxide and subsequently with sulphuric acid and formaldehyde. Specification 626,151 is referred to.ALSO:A cellular structure is obtained in natural or synthetic resinous materials capable of being softened by heat, excluding polythene, but including rubber and bituminous compositions, by incorporating into the resinous material after mastication a blowing agent consisting of hydrogen peroxide or an organic peroxide, heating the mixture to a temperature sufficient to cause the blowing agent to form gas or vapour in a space permitting of limited expansion of the resinous mass, and while in the expanded state converting the mass into a rigid or elastic form. The organic peroxides may be urea peroxide, acetyl peroxide, or benzoyl peroxide. In examples, rubber is plasticised on a mill, optionally with the addition of zinc oxide and stearic acid and then either damp benzoyl peroxide or whiting and hydrogen peroxide added and the mass heated first to evolve the gas and finally to vulcanise to soft or hard rubber. In a further example coal tar pitch is rendered porous with the aid of 5 per cent benzoyl peroxide solution. Specification 626,151 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB562547A GB632208A (en) | 1947-02-26 | 1947-02-26 | Improvements in or relating to the production of cellular materials from rubber, plastics and bituminous compositions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB562547A GB632208A (en) | 1947-02-26 | 1947-02-26 | Improvements in or relating to the production of cellular materials from rubber, plastics and bituminous compositions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB632208A true GB632208A (en) | 1949-11-17 |
Family
ID=9799598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB562547A Expired GB632208A (en) | 1947-02-26 | 1947-02-26 | Improvements in or relating to the production of cellular materials from rubber, plastics and bituminous compositions |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB632208A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2888407A (en) * | 1951-06-13 | 1959-05-26 | Expanded Rubber Co Ltd | Manufacture of cellular material from bitumen and styrene |
| WO2014013053A2 (en) | 2012-07-20 | 2014-01-23 | Solvay Sa | Foamable composition and foamed polymers prepared thereof |
-
1947
- 1947-02-26 GB GB562547A patent/GB632208A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2888407A (en) * | 1951-06-13 | 1959-05-26 | Expanded Rubber Co Ltd | Manufacture of cellular material from bitumen and styrene |
| WO2014013053A2 (en) | 2012-07-20 | 2014-01-23 | Solvay Sa | Foamable composition and foamed polymers prepared thereof |
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