| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_d9cb217f83556ce2a418344c2d485415 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S264-62 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G73-105
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D71-64
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G73-1067
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G73-1064
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G73-1071
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G73-1028
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G73-1085
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08L79-08 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D71-64
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G73-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G73-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D53-22
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08L79-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08J9-28 |
| filingDate |
1981-06-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_48f839e9868962f13e272608d6743ebb
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4dcb9d4fe90ceb3f826d995428dcdaf4
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7bfbb0b342ae32de53e0e08bac82eaf9
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_29e36be266133c21001b529657974eed
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_88fa9952ae73b9c1d4c08067a52aa717 |
| publicationDate |
1982-12-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
JP-S57209607-A |
| titleOfInvention |
Preparation of polyimide separation film |
| abstract |
PURPOSE: To prepare a film having stable gas separation performance in good reproducibility, by a method wherein the thin film of an aromatic polyamic acid solution is coagulated by water or a lower alcohol-containing liquid and the amide-acid bond of the coagulated film is subjected to imide-cyclization by heating. n CONSTITUTION: An aromatic polyamic acid obtained by polymerizing an aromatic tetracarboxylic acid component and an aromatic diamine component in an org. polar solvent at 120°C or below is dissolved in an org. polar solvent to prepare a film forming solution and the resulting solution is formed into a thin film at a temp. of about 100°C or below not advancing an imide forming reaction excessively and the obtained film is coagulated by contacting the same with water or a liquid solvent containing 60vol% or more lower alcohol. The formed coagulated film is dried and heated to 100W300°C to subject the amide- acid bond in the polymer to imide-cyclization completely to prepare a polyimide film. This film is used over a wide temp. range from room temp. to 200°C and has a high hydrogen permeating speed. n COPYRIGHT: (C)1982,JPO&Japio |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-S61133117-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-H038818-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-S5858113-A |
| priorityDate |
1981-06-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |