| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_1a4290e7077b65fcf9cba43b31113090
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_76a10ab8a7dd4f9acf1058c107043469
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_09045c96c18ce1bf6f3a4ce654d7f1be
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_4338a2680c86b19bdf1a8d243f32afa0 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B29K2105-251
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J2369-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B29K2069-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B29C48-345
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B29C48-387
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B29K2105-0002 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-40
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J9-16
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B29C48-37
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-20
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-307
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B29C48-395
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B29B9-16
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B29C48-04
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J3-12 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-40
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B29C48-395
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B29C48-04 |
| filingDate |
2009-10-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3afa13f944b210507f0eb7e50de2cf13
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ceb09005f43ddfd6e18a112f60fdeb63
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_dd7d339ab7d1f289eaafb9bd4298cc26 |
| publicationDate |
2010-08-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
WO-2010076947-A3 |
| titleOfInvention |
Method for preparing fine spherical polycarbonate powders and method for preparing high molecular weight polycarbonate resin using same |
| abstract |
The present invention relates to a method for preparing fine spherical polycarbonate powders and a method for preparing a high molecular weight polycarbonate resin using the same. The method for preparing the fine spherical polycarbonate powders comprises the steps of: (A) polymerizing non-phosgene polycarbonate; (B) extruding amorphous fine spherical polycarbonate powders; (C) surface-crystallizing the amorphous fine spherical polycarbonate powders under the presence of a solvent and a dispersion medium; and (D) drying the surface-crystallized amorphous fine spherical polycarbonate powders. The method for preparing the high molecular weight polycarbonate resin enables preparation of polycarbonates with a wide range of molecular weights from low to high through solid state polymerization by continuously using fine spherical polycarbonate powders obtained from the previous step. The present invention provides a continuous and economically efficient process for commercial production by remarkably simplifying the polycarbonate crystallization step and surpasses the preparation limit of the high molecular weight polycarbonate, which is the biggest problem of conventional non-phosgene molten polymerization processes. |
| priorityDate |
2008-12-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |