http://rdf.ncbi.nlm.nih.gov/pubchem/patent/KR-100805481-B1
Outgoing Links
| Predicate | Object |
|---|---|
| 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/C08G64-30 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B7-253 |
| filingDate | 2000-10-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2008-02-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2008-02-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | KR-100805481-B1 |
| titleOfInvention | Method of producing polycarbonate |
| abstract | Provided are methods of preparing polycarbonates by reaction of diaryl carbonates such as DPC and dihydric phenols such as BPA. The process utilizes the step of continuously processing the diaryl carbonate and dihydric phenol in the melt in the first reaction step, the second reaction step and at least the first polymerization step, wherein the desired low viscosity / high end cap product is The processing conditions are changed to obtain. The process comprises a ratio of diaryl carbonate to dihydric phenol in the melt prior to the first reaction step of at least 1.08 and a melt flow rate of greater than 10 g / min and 250 at 250 ° C. by controlling the temperature and residence time in the first polymerization step. By providing a polycarbonate product having an end cap level of at least%. The process of the invention can be used in a linear manufacturing process in which one product is produced. The process of the present invention may also be incorporated into a multiline manufacturing process for simultaneous production of more than one product. Thus, the stream of product resulting from the first polymerization stage can be further processed into two or more lines to produce, for example, low viscosity high end cap products and medium viscosity medium end cap products. |
| 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.