GB745248A - Process for the production of closed-cell gas-containing cellular bodies - Google Patents
Process for the production of closed-cell gas-containing cellular bodiesInfo
- Publication number
- GB745248A GB745248A GB20384/53A GB2038453A GB745248A GB 745248 A GB745248 A GB 745248A GB 20384/53 A GB20384/53 A GB 20384/53A GB 2038453 A GB2038453 A GB 2038453A GB 745248 A GB745248 A GB 745248A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gas
- container
- liquid
- under pressure
- pressure
- 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
- C08J9/12—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 physical blowing agent
Landscapes
- 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)
- Battery Electrode And Active Subsutance (AREA)
Abstract
Closed-cell, gas-containing cellular bodies are made by forming a pasty liquid from a thermoplastic resin or an elastomer, e.g. polyvinyl chloride, or copolymers of vinyl chloride with vinyl acetate or acrylonitrile or both or with acrylic esters, polystyrene, polyacrylic compounds, cellulose acetate, or a mixture of polyvinyl chloride and an acrylonitrile-butadiene polymerizate, bringing the liquid in a shape having a surface contact area several times larger than a sphere of the same mass into contact in a container under pressure, e.g. 30-350 atmospheres, with a difficulty condensable gas, e.g. nitrogen, hydrogen or carbon dioxide, introduced from outside the container, so as to incorporate and distribute the gas uniformly in the liquid, heating before, during or after incorporation of the gas so as to gelatinize any ungelatinized material, cooling, relieving the pressure on the gas-treated material, removing the rudimentary cellular body so produced from the container and expanding it. Conversion of the starting material to the pasty liquid condition may be effected by addition of solvents or plasticizers, or by heating.ALSO:Closed-cell, gas-containing cellular bodies are made by forming a pasty liquid from a natural or artificial rubber or a thermoplastic resin, or a mixture, e.g. polyvinyl chloride with an acrylonitrile-butadiene polymerizate, bringing the liquid in a shape having a surface contact area several times larger than a sphere of the same mass into contact in a container under pressure, e.g. 30-350 atmospheres, with a difficulty condensable gas, e.g. nitrogen, hydrogen or carbon dioxide, introduced from outside the container, so as to uniformly incorporate and distribute the gas in the liquid, heating before, during or after incorporation of the gas, so as to gelatinize any ungelatinized starting material, cooling, relieving the pressure on the gas-treated material, removing the rudimentary cellular body so produced from the container and expanding it. Conversion of the starting material to the pasty liquid condition may be effected by addition of solvents or plasticizers, or by heating. Incorporation of the gas may be effected by rolling the liquid around in a rotary container under pressure of the gas, by stirring, kneading or screw-conveying the liquid in a stationary container under pressure of the gas, or by passing the liquid, more than once if desired, as drops, threads or sheets through a container of the gas under pressure. The successive treatments may be carried out in one container, or the material may be pumped, screw-conveyed, or expelled by increased pressure of gas from one container to another.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH745248X | 1952-07-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB745248A true GB745248A (en) | 1956-02-22 |
Family
ID=4533442
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB20384/53A Expired GB745248A (en) | 1952-07-31 | 1953-07-22 | Process for the production of closed-cell gas-containing cellular bodies |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB745248A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2838801A (en) * | 1957-03-29 | 1958-06-17 | Dow Chemical Co | Process for making fire-resistant cellular vinyl aromatic polymer articles |
DE1181897B (en) * | 1957-03-22 | 1964-11-19 | Dow Chemical Co | Injection molding process for the production of foam structures from expandable cores of thermoplastic resinous material |
-
1953
- 1953-07-22 GB GB20384/53A patent/GB745248A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1181897B (en) * | 1957-03-22 | 1964-11-19 | Dow Chemical Co | Injection molding process for the production of foam structures from expandable cores of thermoplastic resinous material |
US2838801A (en) * | 1957-03-29 | 1958-06-17 | Dow Chemical Co | Process for making fire-resistant cellular vinyl aromatic polymer articles |
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