http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2003048972-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_129e393582e6bdf4029baf2206522f45 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-85 |
| filingDate | 2002-05-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6e3e3626a628f594201a91e55a1be404 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_076a5c2b1c002761e692901c5c976d4f http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_319c609ce12d3ec3b1bc14d6543707bc |
| publicationDate | 2003-02-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-2003048972-A |
| titleOfInvention | Method for producing polybutylene terephthalate |
| abstract | (57) [Problem] The present invention aims to prevent the generation of foreign substances based on an organotin compound by using an esterification catalyst having excellent catalytic activity easily and easily, and at the time of direct polymerization reaction more than before. An object of the present invention is to provide a method for producing PBT which has a small amount of foreign matter and a small amount of foreign matter in a polymer and has high productivity. According to a method for producing PBT of the present invention, a dicarboxylic acid containing terephthalic acid as a main component and a diol containing 1,4 butanediol as a main component are subjected to an esterification reaction in a batch system or a continuous system. Thereafter, in a method for producing polybutylene terephthalate by a polycondensation reaction, the esterification reaction is carried out in the presence of an organotitanium compound and an organotin compound, and the angle of repose of the organotin compound is 3 The method is characterized in that a slurry is used at 0 to 60 degrees, which satisfies a condition that a slurry filtration value of the organotin compound with respect to 1,4-butanediol is 10% or less, and then a polycondensation reaction is performed. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2007161964-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2020040215-A1 |
| priorityDate | 2001-05-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 87.