http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6025460-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_f4dfd5a24fd69afc252cad91dfe05fee |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J2379-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J2477-00 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J7-0427 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J7-043 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G73-1007 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08J7-043 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G73-10 |
| filingDate | 1997-11-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2000-02-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_599d8c36bef1b641207b0dc339fc4a6d http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_92a9c6ee2eff3da1268c8cacca6b43f7 |
| publicationDate | 2000-02-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-6025460-A |
| titleOfInvention | Polyamide precursor |
| abstract | The service life of fiber-reinforced polyimide composites in a high temperature oxidative environment is extended by coating with a polyimide coating precursor solution that is synthesized by reacting an aromatic dianhydride with an aromatic diamine in a non-reactive solvent. The reactive solution is heated to a temperature sufficent to reduce its viscosity prior to its use as a coating. Preferably, a mixture of meta-phenylenediamine and para-phenylenediamine is reacted with biphenyldianhydride in n-methyl pyrrolidinone solvent and thereafter heated to between about 50 DEG C. (122 DEG F.) and 150 DEG C. (302 DEG F.) under nitrogen while stirring for a time sufficient to obtain a polyamic acid polyimide precursor coating solution having a Brookfield viscosity of from about 500 to about 5000 cP and a solids content of from about 5 to about 35 weight percent. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-2829563-A4 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2006100317-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-107431016-A |
| priorityDate | 1996-03-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 100.