| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_6842ac50cf3ca2352074cb3a75079618 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-64
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-305 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G85-00 |
| filingDate |
2008-06-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6ad84d49c440cbcc7e3417b006fee9cb
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ab710c95a1869fee8b3deb38f9f52ee7
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_901ff440e2461e7d69f41dea7835382d
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e91e012b6bf848568e09049013a8056f
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_30a4ba95dd3adca6b9bb79c79ba22b91 |
| publicationDate |
2009-12-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-2009312503-A1 |
| titleOfInvention |
Method of Producing High Molecular Weight Polymer |
| abstract |
The present invention provides methods of producing high molecular weight polymer. A method of forming polycarbonate includes the step of combining in a reaction mixture a diaryl carbonate, a transesterification catalyst, an aliphatic dihydroxy compound, and a diacid compound in a reactor system. The temperature and pressure of the reactor system are adjusted to a first reactor setpoints and the reaction mixture is monitored to detect initiation of the exothermic oligomerization reaction. The reactor setpoint are adjusted to second reactor setpoints after detection of initiation of the exothermic oligomerization reaction. The reactor system is maintained at the second reactor setpoints to allow the reaction mixture to react to form an oligomer mixture. The oligomer mixture is then introduced to a polymerization reactor system operating under melt polymerization conditions sufficient to polymerize the oligomer mixture to a Mw of at least 9,000 g/mol (PC) and to remove the phenolic byproduct from the oligomer mixture to form polycarbonate. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8273849-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9193864-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-102712748-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2011082103-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8962770-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2011082144-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8389662-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2011160408-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2011160406-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2011160422-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2011089936-A1 |
| priorityDate |
2008-06-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |