| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_2cb72657cf0479385a9b5e655af1e16f |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B7-2533
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B7-2536 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B7-2534
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-14
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-307
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-30 |
| classificationIPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B7-2533
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B7-2536 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B7-2534
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-14
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-30 |
| filingDate |
1999-01-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_98005c2d729c7b64caa633b516f73399
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7b94b45cb065cb7ba95d1b0b155f1c20 |
| publicationDate |
2000-11-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
EP-1048684-A1 |
| titleOfInvention |
Process for producing polycarbonate and optical-disk substrate |
| abstract |
In producing polycarbonates throughntransesterification of a dicarbonate with a dihydroxy compound,na compound having a specific branched structure and servingnas a chain terminator, such as 4-(1,1,3,3-tetramethylbutyl)phenol,nis added to the reaction system. Thenpolycarbonates produced in the process are molded intonoptical-disk substrates. The process provides polycarbonatesnhaving well-balanced fluidity and impact resistance, withoutnrequiring toxic phosgene as the starting material. Thenoptical-disk substrates as obtained by molding thenpolycarbonates produced in the process have reducednbirefringence and improved transcriptional ability. |
| priorityDate |
1998-01-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |