http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CA-1038996-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_0efa077d881a96aeb1e29b21ef1bbb58 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-78 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C69-82 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-78 |
| filingDate | 1975-10-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1978-09-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_08c1eaee8408bcbb29ea3d7abc26484f http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_483119941d95142ac094cef823909e14 |
| publicationDate | 1978-09-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CA-1038996-A |
| titleOfInvention | Continuous manufacture of linear polyesters |
| abstract | ABSTRACT OF THE DISCLOSURE An improved process for the continuous manufacture of linear high molecular weight polyesters by direct esterification of terephthalic acid with excess glycols in a medium comprising terephthalic acid glycol esters or their oligomers, under superatmospheric pressure at temperatures above 200°C, followed by polycondensation in the presence Or catalysts at from 260 to 290°C. The improvement is that the mixture fed to the esterification contains terephthalic acid and glycols in the molar ratio of 1:1.15 to 1:1.5 and that during the esterification from 20 to 30% by weight Or the excess of glycols over the molar ratio terephthalic acid:glycols = 1:1 are continuously distilled from the reaction mixture. |
| priorityDate | 1974-10-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 46.