| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c72d118f5664072de841f9c5c34b9d99 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-307 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-30 |
| filingDate |
2007-05-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_cc22676321ac715a2a324074f093b346
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6e4eefc12bb104c87e5ddc291aeea744
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d4953ab214d5ee972385e4f1d8b7ed65
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6215a328ea9056a6935c1f19bb70ba26
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0f4c220e1a06a6241677f451934a9898
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_efab709a1ec9831f5cf7829dcd8ec4d8
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_76011d448dfb774e4ac3526a6c3301e1 |
| publicationDate |
2008-02-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
TW-200808865-A |
| titleOfInvention |
Method of stabilization of dihydric phenols |
| abstract |
A method of producing a polycarbonate, the method comprising: polymerizing a dihydric phenol and a carbonate precursor in the presence of oxalic acid to produce a polycarbonate with a yellowness index of less than or equal to 10 measured in accordance with ASTM E313 test method on molded samples having a thickness of about 2.5 millimeters; wherein the amount of oxalic acid ranges from about 20 parts per million to about 350 parts per million, relative to an amount of the dihydric phenol; wherein the dihydric phenol is represented by Formula (I): wherein R is a hydrogen atom or an aliphatic functionality having 1 to 6 carbon atoms; and n is an integer having a value of 1to 4. |
| priorityDate |
2006-06-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |