http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-H04198320-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_6cfc033f059d282fcd915bc8be2ae53f |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G73-10 |
| filingDate | 1990-11-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_07acd45dd1c4cc155e030a761f04a8b7 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_622a429c790cc025ad0dbd84f2ca614e http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_34b316ff04d0d7e37286ea8d63c2948d http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d77fb906c83dbdbc08860c82dc6aa8ae |
| publicationDate | 1992-07-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-H04198320-A |
| titleOfInvention | Polyimide having excellent thermal stability and its production |
| abstract | PURPOSE: To obtain the subject polymer resistant to the lowering of the mechanical properties in hot air and having excellent thermal oxidation stability by using a phenylenediamine compound, a specific tetracarboxylic acid dianhydride and phthalic anhydride as raw materials. n CONSTITUTION: The objective polymer containing the recurring unit of formula V as principal skeleton and having molecular terminal sealed with dicarboxylic acid anhydride of formula IV can be produced by reacting a phenylenediamine compound of formula I with a tetracarboxylic acid dianhydride of formula II (X is -Oor group of formula III) (e.g. 3,3',4,4'-diphenyl ether tetracarboxylic acid dianhydride) in the presence of 0.001-1mol of phthalic anhydride (based on 1mol of the compound of formula I) preferably at ≤50°C and thermally or chemically imidating the resultant polyamic acid. n COPYRIGHT: (C)1992,JPO&Japio |
| priorityDate | 1990-11-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 22.