http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-102372848-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-307 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-30 |
| filingDate | 2010-08-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2016-03-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2016-03-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-102372848-B |
| titleOfInvention | A kind of method of preparing polycarbonate through melt transesterification technology |
| abstract | The present invention relates to a kind of method of preparing polycarbonate through melt transesterification technology.With diphenyl carbonate and dihydroxyphenyl propane for raw material, under catalyst action, point transesterify and polycondensation two stage synthetic aroma polycarbonate.Used catalyst is basic metal acetyl acetone complex, and relative to every mole of aroma dihydroxy, the usage quantity of catalyzer is 10n -7 -10n -3 mol, temperature of reaction, between 100-250 DEG C, reduces pressure stage by stage.Product prepared by the present invention has higher viscosity-average molecular weight, colourless, lower viscosity-average molecular weight and number-average molecular weight ratio. |
| priorityDate | 2010-08-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 33.