http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-906120-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_47becd0bad1e8c65826be1edac09d306 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C273-025 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G12-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C45-783 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C45-86 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C45-78 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C45-86 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G12-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C273-02 |
| filingDate | 1958-10-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1962-09-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-906120-A |
| titleOfInvention | Improvements relating to concentrated urea-formaldehyde solutions |
| abstract | Gaseous formaldehyde is continuously absorbed in a multi-stage process to give stable concentrated solutions, the solvent being an aqueous urea solution, the molar ratio of total urea to total formaldehyde being from 1:4 to 1:10 and the absorption being carried out at a pH of from 7 to 9. The stable solution obtained is a mixture of water, urea, formaldehyde and addition products of urea and formaldehyde which are principally condensation products of the methylolurea type in the form of monomers or polymers of low molecular weight.ALSO:Gaseous formaldehyde is continuously absorbed in a multi-stage process to give stable concentrated solutions, the solvent being an aqueous urea solution, the molar ratio of total urea to total formaldehyde being from 1 : 4 to 1 : 10 and the absorption being effected at a pH of from 7 to 9. The absorption is effected in a multi-stage apparatus, the urea solution being circulated countercurrently to the gaseous formaldehyde. The stable solution obtained is a mixture of water, urea, formaldehyde and addition products of urea and formaldehyde (primarily condensation products of the methylolurea type in the form of monomers or low molecular weight polymers). The gaseous formaldehyde used may be obtained by the oxidation of methanol. |
| priorityDate | 1957-10-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 28.