http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9115250-B2
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_d9cb217f83556ce2a418344c2d485415 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_827fa94fd6a12c2b27c4fc7958d53fbf http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_811047a7594230ecb643ffdaa67fa19a |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08L79-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G73-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G73-1007 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G73-1028 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G73-10 |
| filingDate | 2007-11-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2015-08-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_992c6ed01943fdbaea7a87adf34bab09 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e54b94ae975e6e92119f9f21d2faaf6f |
| publicationDate | 2015-08-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-9115250-B2 |
| titleOfInvention | Process for producing polyamic acid solution and polyamic acid solution |
| abstract | In a first step, a diamine is reacted with a molar excess of a tetracarboxylic dianhydride in a solvent containing more than ⅓ mole of water per mole of the tetracarboxylic dianhydride, whereby preparing a polyamic acid solution. Subsequently, in a second step, a diamine and/or a tetracarboxylic dianhydride are added to the polyamic acid solution obtained in the first step so that the molar amount of the diamine component is substantially equal to the molar amount of the tetracarboxylic acid component, and then the diamine and the tetracarboxylic dianhydride are reacted, whereby preparing a polyamic acid solution. By this process, a polyamic acid solution having a high concentration and a low viscosity may be reproducibly and reliably produced, while controlling the molecular weight of the polyamic acid to a predetermined low level. |
| priorityDate | 2006-11-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 141.