http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2004536917-A
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-307 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-30 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-30 |
| filingDate | 2002-07-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2004-12-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-2004536917-A |
| titleOfInvention | Extrusion method for producing polycarbonate |
| abstract | 【Task】 Reduction of catalyst amount during polycarbonate production by the melting method. [Solution] Extrusion of a mixture of an ester-substituted diaryl carbonate, such as bis (methylsalicyl) carbonate, a dihydroxy aromatic compound, such as bisphenol A, and a transesterification catalyst, such as tetrabutylphosphonium acetate (TBPA), yields a polycarbonate having a weight average molecular weight greater than 20,000 daltons. . The extruder is equipped with one or more vacuum vents to remove ester-substituted phenol by-products. Similarly, extruding a precursor polycarbonate having an ester-substituted phenoxy end group, such as a methyl salicyl end group, results in a polycarbonate having a significantly increased molecular weight. The high molecular weight polycarbonate forming reaction may be catalyzed by the residual transesterification catalyst present in the precursor polycarbonate or a combination of the residual catalyst and an additional catalyst such as TBPA introduced during the extrusion stage. No fleece product is observed in the polycarbonate product. [Selection diagram] Fig. 1 |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2005514466-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2022508400-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2009016804-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2009052026-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-7198930-B2 |
| priorityDate | 2001-07-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
| Predicate | Subject |
|---|---|
| isDiscussedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/substance/SID433634035 http://rdf.ncbi.nlm.nih.gov/pubchem/compound/CID154537552 |
Total number of triples: 17.