| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c72d118f5664072de841f9c5c34b9d99 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B29C48-58
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-081
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B29C48-03
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B29K2069-00 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-14
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B29C48-76
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-307
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B29C67-246
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B29C48-022
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B29C48-767
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-205 |
| classificationIPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B29C48-58 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B29C67-24
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-14
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-30
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B29C48-76 |
| filingDate |
2003-06-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_61b37704065a7068e82b25314faf034a
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_60bf8f3ae0c510d5947023efedc22616
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_efab709a1ec9831f5cf7829dcd8ec4d8
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9ee7accef8622ed98f19995e2428dcbf
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_76a0059f1172e6af6d776a72d28d5fd7
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1ecf77e58b74c483b50ef40caa343a60
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8d6235a0d145104723060afffd759213
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_511832541aea3ab73e82d0df89bff097 |
| publicationDate |
2004-03-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
TW-200403280-A |
| titleOfInvention |
Method for making an aromatic polycarbonate |
| abstract |
This invention relates to an extrusion method preparing polycarbonates from a solution of an oligomeric polycarbonate. A mixture of bis(methyl salicyl) carbonate (BMSC), BPA and a transesterification catalyst are first equilibrated at moderate temperatures to provide a solution of polycarbonate oligomer in methyl salicylate. The solution is then fed to a devolatilizing extruder, where the polymerization reaction is completed and the methyl salicylate solvent is removed. The solution comprising the oligomeric polycarbonate can also be pre-heated under pressure to a temperature above the boiling point of methyl salicylate and subsequently fed to a devolatilizing extruder equipped for rapid flashing off the solvent. The method provides polycarbonate with greater efficiency than the corresponding process in which unreacted monomers are fed to the extruder. Additionally, the method of the invention does not require the isolation of a precursor polycarbonate comprising ester-substituted phenoxy terminal groups. |
| priorityDate |
2002-06-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |