http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2005215758-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_0c380e008fed0ad8c94fb1f05879c43c http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_d35a8340c13d7a4a447f5178fd372b8a http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_063d22db17e10ea901da88fd556384fd http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_d63c7329ea29659eb99ea95258912ab1 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10T428-31507 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10T428-31504 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-307 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-30 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-30 |
| filingDate | 2003-05-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a12945b94d694ef07f47d013cf553eeb http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_27b22778298801e44e7f61d296394bf3 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_67aa106084bd787e6a4491fac2ca2681 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6a4a418f5fb67f676f679c61350732e8 |
| publicationDate | 2005-09-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-2005215758-A1 |
| titleOfInvention | Method for preparing high molecular weight polycarbonate |
| abstract | The present invention relates to a process for preparing high molecular weight polycarbonate resin, particularly to a process for preparing high molecular weight polycarbonate resin, which conducts condensation polymerization of low molecular weight amorphous polycarbonate prepolymer prepared by transesterification of dialkyl(aryl)carbonate and aromatic hydroxy compound and solid state polymerization within short time to increase molecular weight. The present invention introduces condensation polymerization to lower mole fractions of arylcarbonate existing in unreacted diarylcarboante, end groups of reaction by products of polymerization degree less than 3, and polycarbonate prepolymer obtained by transesterification, and thus can maximize molecular weight increase of polycarbonate after solid state polymerization and remarkably reduce time required for preparing polycarbonate of the same molecular weight. In addition, since the present invention does not use toxic substance phosgene, it has no danger and it can prevent deterioration, and it can prepare high molecular weigh polycarbonate that can be used for injection and extrusion. |
| priorityDate | 2002-05-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 61.