http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-S5710624-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_1374dd16777534b65ad4422333245af8 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-181 |
| filingDate | 1980-06-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0aa8c7cf08f4f3625221f6f68a1d5804 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2989e6f8415e932109f0c9d62ac79558 |
| publicationDate | 1982-01-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-S5710624-A |
| titleOfInvention | Preparation of copolyester |
| abstract | PURPOSE: To obtain a copolyester having improved transparency, heat resistance, and fixed quality, by dissolving previously neopentyl glycol in ethylene glycol in the absence of a catalyst, adding them to a reaction system, followed by polycondensation. n CONSTITUTION: Preferably 30W80wt% neopentyl glycol is blended with ethylene glycol and dissolved in ethylene glycol at 50W60°C. Preferably 5W30mol% based on total polyester components of neopentyl glycol is added to a reaction system, and, for example, the first stage reaction is carried out in the presence of an ester exchange catalyst. Polycondensation is effected at a temperature ≥ the melting point of the reaction mixture to ≤ 290°C, to give the desired polyester. n EFFECT: Since neopentyl glycol will not decompose, no impurities are contained, color tone of polymer is good, and degree of polymerization will not change. n COPYRIGHT: (C)1982,JPO&Japio |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0147907-A2 |
| priorityDate | 1980-06-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 17.