GB1103314A - Foamed oxymethylene polymers - Google Patents
Foamed oxymethylene polymersInfo
- Publication number
- GB1103314A GB1103314A GB2563265A GB2563265A GB1103314A GB 1103314 A GB1103314 A GB 1103314A GB 2563265 A GB2563265 A GB 2563265A GB 2563265 A GB2563265 A GB 2563265A GB 1103314 A GB1103314 A GB 1103314A
- Authority
- GB
- United Kingdom
- Prior art keywords
- polymer
- liquid
- oxymethylene
- trapped
- per cent
- 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
- C08J9/28—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof by elimination of a liquid phase from a macromolecular composition or article, e.g. drying of coagulum
-
- 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
- C08J2359/00—Characterised by the use of polyacetals containing polyoxymethylene sequences only
- C08J2359/02—Copolyoxymethylenes
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)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Polyethers (AREA)
Abstract
A cellular oxymethylene polymer product is prepared by dissolving the solid polymer in a volatilizable liquid and then evaporating the liquid so as to precipitate the polymer while causing a dispersion of gaseous or vaporous bubbles to be trapped in the solidifying polymer. Preferably the liquid is a solvent for the polymer only at temperatures above its boiling point at normal pressure, the solution being formed under pressure and the pressure being suddenly released to cause rapid volatilization of the liquid. Suitable solvents are alcohols containing 1 to 20 carbon atoms, ketones, alkanolamines, esters and ethers, optionally in mixture with water. The volatilization of the liquid can also be effected by bubbling an inert gas through the solution, the gas being trapped by the solidifying polymer. Preferred polymers are those containing 0.4 to 15 mole per cent of oxyethylene groups distributed among the oxymethylene groups which form the major part of the polymer, e.g. a copolymer of trioxane and approximately 2 weight per cent ethylene oxide. In examples, methanol, ammonia and water are used and nitrogen as the inert gas.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US37938564A | 1964-06-30 | 1964-06-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1103314A true GB1103314A (en) | 1968-02-14 |
Family
ID=23497025
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2563265A Expired GB1103314A (en) | 1964-06-30 | 1965-06-17 | Foamed oxymethylene polymers |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE666159A (en) |
| DE (1) | DE1282971B (en) |
| GB (1) | GB1103314A (en) |
| NL (1) | NL6508352A (en) |
-
1965
- 1965-06-17 GB GB2563265A patent/GB1103314A/en not_active Expired
- 1965-06-29 NL NL6508352A patent/NL6508352A/xx unknown
- 1965-06-29 DE DE1965C0036249 patent/DE1282971B/en active Pending
- 1965-06-30 BE BE666159D patent/BE666159A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| BE666159A (en) | 1965-12-30 |
| NL6508352A (en) | 1965-12-31 |
| DE1282971B (en) | 1968-11-14 |
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