http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2012131767-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_d9cb217f83556ce2a418344c2d485415 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G73-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D307-89 |
| filingDate | 2011-07-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b0bb2bd0ba889c442738e7ae839fd763 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_74f8fa87c451e30b6901ea1198afe389 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_773772b1e9ec03abb2c19a495cd8c492 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b6b525eea2999d6b471b59eeacc63842 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_62f5ddc21d1494626121301aa91e90f3 |
| publicationDate | 2012-07-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-2012131767-A |
| titleOfInvention | Method of purifying 2,3,3 ', 4'-biphenyltetracarboxylic dianhydride powder, powder, and polyimide using the same |
| abstract | PROBLEM TO BE SOLVED: To provide a purification method for obtaining 2,3,3 ', 4'-biphenyltetracarboxylic dianhydride powder with little coloration by a simple operation and 2,3,3', 4'-biphenyltetra with little coloration An object of the present invention is to provide a carboxylic acid dianhydride powder and a polyimide having improved light transmittance that can be suitably used for high-performance optical materials. A solvent having a solubility at 25 ° C. in 2,3,3 ′, 4′-biphenyltetracarboxylic dianhydride of 1 g / 100 g or more and 2,3,3 ′, 4′-biphenyltetracarboxylic dianhydride Anhydrous powder is mixed in a non-uniform state in which at least a portion of 2,3,3 ′, 4′-biphenyltetracarboxylic dianhydride powder is not dissolved, and then undissolved 2,4 The present invention relates to a method for purifying 2,3,3 ′, 4′-biphenyltetracarboxylic dianhydride powder, which comprises separating and recovering 3,3 ′, 4′-biphenyltetracarboxylic dianhydride powder. [Selection figure] None |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-113817167-A |
| priorityDate | 2010-12-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 171.