http://rdf.ncbi.nlm.nih.gov/pubchem/patent/ES-2177384-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_920a6543b6c746d3962790ed84e5d9de |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-307 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-30 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B7-253 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B7-253 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-30 |
| filingDate | 2000-02-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d86057f73075d1cc07beb9c65da781c2 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_60b0d20e2d064234eb373b1f0e57f5a1 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_230bb98b9ef770fbf201445a6e3e0a1e http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2baf9971ac02e53ba944a89d17f5e2a6 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_224322b716e2d1f0595d612d8da1fe2b |
| publicationDate | 2002-12-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | ES-2177384-A1 |
| titleOfInvention | POLYCARBONATE PREPARATION PROCEDURE |
| abstract | Polycarbonate preparation procedure. Process for the preparation of polycarbonates by reaction of a diaryl carbonate and a dihydric phenol that uses the steps of successively processing diaryl carbonate and dihydric phenol in the molten state in a first reaction stage, a second reaction stage and therefore minus a first polymerization stage, and change the processing conditions to obtain the desired low viscosity, high level plugged product. The ratio of diaryl carbonate to dihydric phenol in the melt before the first reaction exceeds 1.08 and the temperature and residence time in the first polymerization stage is controlled to provide a polycarbonate product having a flow rate in the molten state at 250 ° C greater than 10 g / 10 min and a level of capped ends of at least 90%. The process of the invention can be used in a linear manufacturing process, in which a single product is produced, or it can be incorporated into a multi-line manufacturing process for the simultaneous production of more than one product. |
| priorityDate | 2000-02-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 25.