| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_13acffa0e4ce30d3be128ccd86b384f6 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D69-125
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D71-381
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D71-38 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D71-38
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D69-12
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D71-60 |
| filingDate |
1986-12-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_29780035d99e92c44107a49cda685ccc
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_199be7c964c3be02e331e59941e13df0
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_fbb05795659ec6b10ea9a251a82966f0 |
| publicationDate |
1987-07-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
EP-0228248-A2 |
| titleOfInvention |
Composite semipermeable membranes |
| abstract |
A composite semipermeable membrane comprises a porous substrate having on its surface an ultrathin membrane as a surface layer and a porous layer of water-insoluble polyvinyl alcohol as an internal layer integrally supporting the ultrathin membrane. The composite semipermeable membrane is produced by coating or impregnating an aqueous solution containing polyvinyl alcohol and the amino compound having at least two primary amino groups on or in the porous substrate, bringing the coated or impregnated porous substrate into contact with a solution of a polyfunctional crosslinking agent to obtain the ultrathin membrane, and then heating the substrate, preferably followed by treatment with a monohydric or polyhydric alcohol. The crosslinking agent is capable of reacting with the primary amino groups and the hydroxyl groups. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-1039678-C
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1693408-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-9002602-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0992277-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-9010494-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5698105-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-9417905-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7785735-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8960448-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0242877-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-114345148-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1693408-A4
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/AU-677983-B2 |
| priorityDate |
1985-12-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |