| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c7ad58d3c0b071069a8ee0cb8c8ba2e8 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-40
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-406 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02B1-04
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08J3-12
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-40
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B7-2534
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08J5-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B11-105
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B7-26 |
| filingDate |
1999-07-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_308d5a1c9470843ce90e4d3992b71e20
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6b13e76591012529d5ef7e03976df19b
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_47a57c378e97e0a2e675b0508630b600 |
| publicationDate |
2001-06-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
EP-1105432-A1 |
| titleOfInvention |
Highly pure polycarbonates and method for producing same |
| abstract |
The invention relates to a method for producing polycarbonate having a foreign particle index of less than 2.5 <.> 10<4> mu m<2>/g or containing less than 50 ppb alkaline salt, using the interphase method. According to said method the solution containing the polycarbonate is washed with an aqueous wash liquid, the wash liquid is separated and the solvent evaporated. The method is characterized in that the mixture of organic solvent and remaining wash liquid obtained after separation of the wash liquid is heated until a clear solution is obtained and filtered so as to separate the solids. The above highly pure polycarbonates are used notably for optical data memories, lenses and prisms. |
| priorityDate |
1998-08-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |