http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-H04142329-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_2f8cfa5aee4410611b5c562275c9f8e3 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-40 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-30 |
| filingDate | 1990-10-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_be974ab384214ee062bab0e686af0060 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_69e45cbf61f886055682e874add5fcd1 |
| publicationDate | 1992-05-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-H04142329-A |
| titleOfInvention | Production of polycarbonate |
| abstract | PURPOSE: To obtain a colorless and transparent high-molecular weight polycarbonate at good efficiency by melting a starting monomer mixture in a preparation tank, polycondensing the monomer mixture in a tank reactor and increasing the viscosity-average molecular weight on a specified twin-screw extruder. n CONSTITUTION: A process for producing a polycarbonate by melt-polycondensing a dihydroxyl compound [e.g. 2,2-bis-(4-hydroxyphenyl) propane] with a bisaryl carbonate (e.g. diphenyl carbonate) by transesrterification, wherein the above monomer are molten in a preparation tank (step 1), the molten monomer mixture is polycondensed in a tank reactor to obtain a polycarbonate of a viscosity- average molecular weight of 5000-30000 (step 2), and a polycarbonate of a viscosity-average molecular weight of 12000-60000 is obtained on a paddle-type self-cleaning twin-screw extruder (step 3). According to the above process, a colorless and transparent high-molecular weight polycarbonate can be produced at good efficiency. n COPYRIGHT: (C)1992,JPO&Japio |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6323302-B1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-9955764-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0584801-A3 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0584801-A2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0601602-A2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0601602-A3 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-H0733866-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5405934-A |
| priorityDate | 1990-10-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 29.