http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-103013114-B
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_3ff95b076c19c544ca118e0977c0863c |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G73-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08J5-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08L27-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08L79-08 |
| filingDate | 2012-12-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2015-02-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_77732a578985e7b03cf1660c54c67dde |
| publicationDate | 2015-02-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-103013114-B |
| titleOfInvention | Method for preparing waterproof polyimide thin film |
| abstract | The invention discloses a method for preparing a waterproof polyimide thin film. The method comprises the following steps: using nanoscale polytetrafluoroethylene powder and polyamide acid, wherein the mixture of nanoscale polytetrafluoroethylene powder is 3 to 10% of polyamide acid; and during synthesis, synthesizing pyromellitic dianhydride and 4,4'-diaminodiphenyl ether to obtain polyamide acid, wherein in the synthesis process, the calculated 4,4'-diaminodiphenyl ether is placed in a reaction kettle first, and then 90 to 95% of the calculated required total quantity of pyromellitic dianhydride is added in the reaction kettle to synthesize with 4,4'-diaminodiphenyl ether; and utilizing the remaining 5 to 10% of pyromellitic dianhydride to control the viscosity of the final resultant within 90,000 plus/minus 5,000 CP to finish the whole preparation after defoaming, salivation, and film formation. The obtained waterproof polyimide thin film prolongs the service life of a motor in the humid environment and has the functions of isolation and water resistance in a relatively high humidity or water environment. |
| priorityDate | 2012-12-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 22.