http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-S63275546-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_01c1e0bc0628f76dea731cda5a666ca1 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C69-76 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C201-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C205-57 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C219-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C261-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C213-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-00 |
| filingDate | 1987-05-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_163090ec4a1465be93ee959fcdc3812e http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d1b2cd9b3704dac0b7d46844cb3cb807 |
| publicationDate | 1988-11-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-S63275546-A |
| titleOfInvention | Cis and trans-aromatic tetracarboxylic acid dialkyl ester and production thereof |
| abstract | NEW MATERIAL:The compound of formula I or II (n is 1W3; R is 10W30C aliphatic group which may be substituted with halogen, nitro, amino, cyano, etc.). n EXAMPLE: cis- And trans-pyromellitic acid distearyl ester. n USE: A raw material for an ampholytic polyimide precursor. Since the compound can be obtained in pure state, a cis-isomer polymer, a trans-isomer polymer or a copolymer containing both isomers of a poly(amic acid dialkyl ester) which is a polyimide precursor for LB membrane can be synthesized by the use of each isomer. n PREPARATION: The compound of formula I or II can be produced by reacting a tetracarboxylic acid dianhydride of formula III (n is 1 or 2) with an alcohol of formula ROH at about 100°C under nitrogen stream and subjecting the reaction product to fractional crystallization using a halogenated reaction solvent. n COPYRIGHT: (C)1988,JPO&Japio |
| priorityDate | 1987-05-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 25.