http://rdf.ncbi.nlm.nih.gov/pubchem/patent/FR-2786494-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_9339fc07bdba5bcd7874b12660aea248 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-181 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-80 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-88 |
| classificationIPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-181 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-88 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-80 |
| filingDate | 1998-11-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4caaabc2c13215037711dc26b995e50f |
| publicationDate | 2000-06-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | FR-2786494-A1 |
| titleOfInvention | PROCESS FOR PRODUCING POLY (ETHYLENE TEREPHTHALATE) -POLY (ETHYLENE ISOPHTALATE) COPOLYESTERS |
| abstract | The present invention relates to a process for the production of poly (ethylene terephthalate) -poly (ethylene isophthalate) copolyester, containing at least 8% of isophthalic units. It comprises the following stages: a) esterification or transesterification with ethylene glycol of a mixture comprising terephthalic acid or methyl terephthalate and at least 8% by weight of isophthalic acid or methyl isophthalate, b ) polymerization in the melt phase of the esterification product, c) solidification and granulation, d) crystallization by bringing the granules into contact with a non-solvent liquid medium of the polymer or by successive treatment in two crystallizers, a first crystallizer comprising a heating means granules and a means making it possible to impose on the granules a uniform residence time inside, a second crystallizer comprising means for producing a bed of granules fluidized by a stream of hot gas, e) post-condensation in phase solid crystallized granules. The crystallization step according to one of the embodiments makes it possible to avoid the phenomena of sticking of the granules during the post-condensation step in the solid phase. |
| priorityDate | 1998-11-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 70.