http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1295585-A
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10T428-249989 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S264-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J2201-0543 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D2323-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D2325-022 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10T428-249961 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10T428-268 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J2201-0546 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10T428-249979 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D67-0011 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D71-52 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D67-0013 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J9-28 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D69-02 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D67-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D69-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D71-52 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08J9-28 |
| filingDate | 1971-04-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1972-11-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1295585-A |
| abstract | 1295585 Microporous membrane GENERAL ELECTRIC CO 19 April 1971 [13 May 1970] 9865/71 Heading B5B A microporous membrane wherein the pores increase progressively in size across the membrane thickness and wherein the porosity is provided by a network of interconnected micropores extending through a mass of polymer crystals interconnected in a network of the same polymer, is made by dissolving the polymer in a mixture of a relatively good and a relatively poor solvent, the "good" solvent being the more volatile and the solvents being miscible, casting the solution on to a flat surface and allowing partial desolvation to occur, followed by immersion in a leaching agent, which is a non-solvent for the polymer but is miscible with both solvents, whereby a membrane forms by coagulation, the membrane being removed and dried. The polymer is a polyarylene oxide, polycarbonate, polyalkyl methacrylate or polysulphone. The largest pore size may be 100 . The film may have on its least porous surface a thin, dense skin (e.g. 100 -10 Á thick), this being obtained by extending the desolvation period. Specified polymer-good solvent-poor solvent-leaching agent combinations are: polymethylmethacrylate-acetoneformamide-water; a copolymer of bisphenol A and dichlorodiphenylsulphone or a polycarbonate - chloroform - toluene - methanol; and polyxylylene oxide - chloroform - dichlorobenzene-methanol. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/FR-2424750-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-2739118-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5980746-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4308145-A |
| priorityDate | 1970-05-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 34.