http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1103314-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_04650c4315071ee8af7d26e3441a53b1 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J2359-02 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J9-28 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08J9-28 |
| filingDate | 1965-06-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1968-02-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1103314-A |
| titleOfInvention | Foamed oxymethylene polymers |
| 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. |
| priorityDate | 1964-06-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 25.