| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c7ad58d3c0b071069a8ee0cb8c8ba2e8 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-307
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-14 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-20
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-14
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-42
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-30 |
| filingDate |
1994-04-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6ec465b71181b9e07b6c1f14926f38ba
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9b475a17e6c6b257d688bf880a935705
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d7d590cb2dc6b185d8a4fc9bf13ef515 |
| publicationDate |
1994-11-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
JP-H06306159-A |
| titleOfInvention |
Two-step method for producing thermoplastic polycarbonates |
| abstract |
(57) Abstract: The present invention uses an ammonium and / or phosphonium catalyst in the melt in the first stage and an alkali metal and / or alkaline earth metal catalyst in the second stage. And a two-step process for producing a thermoplastic, solvent-free, lightly branched polycarbonate. According to the method of the present invention, oligocarbonates can be produced using low concentrations of ammonium and / or phosphonium catalysts and, in the second stage, alkali metal and / or alkaline earth metal catalysts. Polycondensation can be used to produce lightly branched, light-colored polycarbonate in a short time. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2005097539-A |
| priorityDate |
1993-04-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |