http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0926181-A3
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c72d118f5664072de841f9c5c34b9d99 |
| classificationCPCInventive | 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/C08G64-30 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08K5-58 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F2-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-30 |
| filingDate | 1998-12-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1999-07-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-0926181-A3 |
| titleOfInvention | Manufacturing method for polycarbonate |
| abstract | A method for manufacturing polycarbonate by melt-polycondensing bisphenol andncarbonic acid diester uses as catalyst an alkali metal compound and/or alkaline earth metalncompound (a). The catalyst is added to the bisphenol prior to the melt polycondensation.nin an effective amount, i.e., the amount of alkali metal compound and/or alkaline earthnmetal compound (a) that acts effectively as a catalyst, is contained in said bisphenol, andnis controlled to have the same catalytic activity as 1 x 10 -8 to 1 x 10 -6 mole of bisphenolndisodium salt per mole of pure bisphenol A. The method conducts the reaction efficientlynfrom the initial stage in a stable manner to obtain polycarbonate with good color, goodnheat stability and color stability during molding and the like. |
| priorityDate | 1997-12-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 22.