http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-S60161949-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_ad2cd796f8c4dcb425ddcc68707d3444 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P20-52 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07B61-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J31-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J31-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C69-82 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-82 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-00 |
| filingDate | 1984-02-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_552ab20d863aa61c577d2cf232523b1b http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_55e16cf075f5ae23f42fb66070619d1f |
| publicationDate | 1985-08-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-S60161949-A |
| titleOfInvention | Preparation of polytetramethylene terephthalate oligomer |
| abstract | PURPOSE: To obtain the titled oligomer with suppressed formation of THF at a relatively low temperature, by direct esterification in the presence of a specific amount of a mixed catalyst of a titanium compound and aluminum compound at a specific molar ratio. n CONSTITUTION: Terephthalic acid is directly esterified with 1,4-butanediol in the presence of a catalyst. In the process, a mixed catalyst of a titanium compound, e.g. titanium tetraethoxide or titanium oxalate, and an aluminum compound, e.g. aluminum triethoxide, at 75/25W25/75 molar ratio in an amount of 0.06W 0.13mol%, preferably 0.07W0.12mol%, based on the acid component is used as the catalyst, and reaction is carried out at ≤215°C to give the aimed oligomer having ≤4,000 equivalents/ton acid value and ≥50% esterification ratio. The molar ratio between the 1,4-butanediol and the terephthalic acid is preferably 1.2W2.2. n COPYRIGHT: (C)1985,JPO&Japio |
| priorityDate | 1984-02-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 29.