| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_2f8cfa5aee4410611b5c562275c9f8e3 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-20
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-04
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-30 |
| filingDate |
1989-06-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_40648113e4c5bf91215c55b104e59c8e
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ecbd56f7d05e62ff1b24ec1ed4a7f054 |
| publicationDate |
1991-02-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
JP-H0326722-A |
| titleOfInvention |
Preparation of polycarbonate |
| abstract |
PURPOSE: To provide a colorless, transparent polycarbonate having a high mol.wt. without poisonous phosgene by melt-polycondensing a dihydric phenol with bisphenyl carbonate in the presence of an electron-donating amine compound. n CONSTITUTION: A dihydric phenol [preferably a compound of formula I-IV (R 1 -R 4 are H, 1-8C alkyl or phenyl; X is halogen; n is 0-4; m is 1-4)] is melt- polycondensed with bisphenyl carbonate preferably at 130-280°C in the presence of a catalyst selected from electron-donating amine compounds (e.g. N,N- dimethyl-4-aminopyridine)] to provide the objective polycarbonate. n COPYRIGHT: (C)1991,JPO&Japio |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-H03140324-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-9315129-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-H03149221-A |
| priorityDate |
1989-06-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |