| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_d3de607e369a55daf2120ea4267a4827 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D2323-12 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D67-00113
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D67-0009
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D71-64
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D67-0011 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D67-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D71-52
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D71-64
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08J9-28
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D53-22 |
| filingDate |
1983-12-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_18523200ae81745442bfb08e89cac773
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8e5f1f5a7576a404b74e9147ac4e9bef
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_92bb494fe6823bcaf40067973710a5a3
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_93166e87391c9bc207d7c87caff4c693 |
| publicationDate |
1985-07-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
JP-S60125205-A |
| titleOfInvention |
Improvement in preparation of polyimide membrane |
| abstract |
PURPOSE:To enhance separation property without lowering a permeation speed, in preparing a membrane, by adding a definite amount of a specific aliphatic carboxylic acid compound in a dope consisting of polyimide and a phenolic compound. CONSTITUTION:A polymer used as a membrane comprises aromatic polyimide having 90% or more of a repeating unit represented by formula in its main chain. This polymer is dissolved in a phenolic solvent, especially, halogenated phenol with a b.p. of 300 deg.C or less to prepare a dope to which specific aliphatic carboxylic acid such as undecanoic acid, lauric acid or oleic acid is, in turn, added in an amount of 5-40%wt. of polyimide. A membrane with a thickness of 10-500mum is formed from this dope and immersed in a coagulation bath consisting of an org. liquid freely mixed with the phenolic solvent and water to be coagulated. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4880442-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2001316579-A |
| priorityDate |
1983-12-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |