http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1027411-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_47becd0bad1e8c65826be1edac09d306 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F214-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F214-26 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F214-26 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F214-18 |
| filingDate | 1964-01-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1966-04-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1027411-A |
| titleOfInvention | Fluorin-containing copolymers and process for their preparation |
| abstract | Fluorine-containing thermoplastic copolymers are prepared by copolymerizing tetrafluoroethylene and 1,2,3,3,3-pentafluoropropylene in a liquid medium in the presence of a free radical polymerization initiator at -30 DEG to 200 DEG C. The medium may be a perhalogenated compound, e.g. perfluorocyclobutane, perfluorodimethyl cyclobutane, perfluoropyrane, tetra-fluorodichloroethane or excess pentafluoropropylene; or water which may also contain emulsifiers, e.g. alkali metal, alkaline earth metal and ammonium salts of perhalogenated or o -hydro-perhalogenated fatty acids containing 6 to 20 carbon atoms, and buffers, e.g. alkali metal phosphates and borates. The initiators may be inorganic or organic peroxy compounds, optionally activated with sulphite or thiosulphate reducing agents or heavy metal salts; or azo compounds; and lists of suitable initiators are given. Polymerization may be effected in the presence of modifiers, e.g. mercaptans and aliphatic halocarbons. The copolymers may be formed into shaped articles by extrusion, compression or injection moulding, or may be made into fibres and threads. Examples describe the copolymerization of tetrafluoroethylene and pentafluoropropylene in the presence of (1, 4 and 5) water, sodium perfluorooctanoate, ammonium persulphate and sodium pyrosulphite; (2) water, sodium perfluorocaprylate, ammonium persulphate and disodium phosphate; (3) water, ammonium perfluorocaprylate, ammonium persulphate and sodium pyrosulphite; (6) water, ammonium perfluorocaprylate, ammonium persulphate, sodium pyrosulphite and ferrous sulphate; (7) water, ammonium persulphate and ferrous sulphate; (8) hydrogen peroxide and perfluorobutyric anhydride; (9) azo-bisisobutyronitrile and perfluorocyclobutane; (10) lauroyl peroxide and perfluorocyclobutane; and (11) benzoyl peroxide. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5494984-A |
| priorityDate | 1963-01-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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