http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2022041806-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_78ca80ad4b743c901ec136b21263f093 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-307 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-06 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-30 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-06 |
| filingDate | 2019-12-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5bb053da6b91f09bb6a1dfddf9e516e9 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_683a9561a038b7471e27e643c11c78f0 |
| publicationDate | 2022-02-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-2022041806-A1 |
| titleOfInvention | Polycarbonate compositions with improved oxidation stability and methods of manufacturing the same |
| abstract | A method of preparing a polycarbonate composition in a polymerization system that comprises a monomer mixing unit, an oligomerization section, and a polymerization section. The method includes melt polymerizing a dihydroxy compound with a diaryl carbonate compound in the presence of a quaternary phosphonium catalyst to produce the polycarbonate composition having a phosphorus-containing byproduct of at least one of the quaternary phosphonium catalyst or of the diaryl carbonate compound. The method further includes recycling the phosphorus-containing byproduct into the monomer mixing unit of the polymerization system and removing the polycarbonate composition from the polymerization system. The recycle stream has a phosphorus concentration of greater than or equal to 40 ppm. |
| priorityDate | 2018-12-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 33.