| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_20688220cab72ad01902ff5223732946 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-183
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-83
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-826
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-78 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-83
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-82
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-78
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-183 |
| filingDate |
1992-02-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2dae773da90e5a51e7e2ab29b22a9fae
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1c8221e65bf37a0caa56367dd3bfe388
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4a6321b2f477482bbfb0b08fef2c2cd3
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a9ca50f05af4323c6171546a4f483324
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d3e4bd5ec4a0fdee4faaecbd5cc9213e |
| publicationDate |
1992-09-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
EP-0501543-A1 |
| titleOfInvention |
Process for the production of polyesters with increased electroconductivity |
| abstract |
A continuous direct esterification and polycondensation process is disclosed in view of the production of polyester comprising units of ethylene terephthalate as the major repeating units, said polyester being substantially improved in particular in respect of its electroconductive properties. Said process comprises supplying terephtalic acid and ethylene glycol to bis(betahydroxy ethyl) terephthalate or its oligomer so as to carry out esterification, followed by polycondensing the resulting oligomer under increasingly reduced pressure, and wherein a solution in ethylene glycol of an electroconductivity enhancing additive, preferably a metallic salt, such as e.g. magnesium acetate, is added to the oligomer reaction mixture when the esterification rate has reached at least 80 % and characterised in that said ethylene glycol solution is added to the oligomer reaction mixture in such manner that escape of the added ethylene glycol out of the said oligomer reaction mixture is prohibited. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1785442-A3
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-1060185-C
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0663416-A3
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0663416-A2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1785442-A2 |
| priorityDate |
1991-02-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |