- Hydrofluoroether compound and its preparation method and application (by machine translation)
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The invention belongs to the field of hydrofluoroether, in particular to a hydrofluoroether compound and its preparation method and application. Hydrofluoroether compound expressed by following formula: F [CF (CF3 ) CF2 O]x - RH ; Wherein x=2 - 7; RH =CH3 , C2 H5 , N - C3 H7 Or i - C3 H7 . The present invention provides a hydrofluoroether compound, only fluorine-containing this the only halogen element, not having to damage the ozone layer material, is an environment-friendly non-combustible heat transfer agent, solvent and cleaning agent. (by machine translation)
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Paragraph 0081-0083
(2019/04/26)
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- Radical additions to fluoro-olefins. Photochemical mono-fluoroalkylation and sequential bis-fluoroalkylation of oxolane
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Oxolane was fluoroalkylated by its photoadditions under atmospheric pressure. Monofluoro-alkylations were carried out with hexafluoropropene (1) and perfluorovinyl ethers C3F7O-[CF(CF3)CF2O]n-CF=CF2 (2-4, n=0-2) by direct photoexcitation of the oleflns to give high yields of addition products 9-12 (81-94%). The reactions were completely regioselective at the oxolane molecule and almost completely regioselective (93-99%) at the double bond of fluoro-olefins; no bis-fluoroalkylated oxolanes were detected. The completely selective introduction of a second fluoroalkyl into position 5 of the oxolane molecule was accomplished by acetone-sensitised photoaddition of 2-fluoroalkylated oxolanes 9, 10 to fluoro-olefins 1 and 2. Byproducts from reactions of the dimethylketyl radical which is formed in the initiation step were isolated and have given some evidence about the reaction mechanism that is discussed.
- Paleta, Oldrich,Cirkva, Vladimir,Kvicala, Jaroslav
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p. 125 - 134
(2007/10/03)
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- SURFACE ACTIVE SUBSTANCES CONTAINING AN OLIGO(HEXAFLUOROPROPENE OXIDE) CHAIN AS A HYDROPHOBIC AND OLEOPHOBIC MOIETY
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Oil soluble surface active substances, (HFPO)n-Ar, where Ar is an aryl group and (HFPO)n is an oligo(hexafluoropropene oxide) group, n = 2 - 5, were prepared and tested for their surface activities in toluene or m-xylene.Addition of a small amount of (HFPO)4-6-Ar (0.2 - 0.5 wtpercent) was found to decrease remarkably the surface tension of these solvents (down to 12 - 14 dyncm-1 at 20 deg C).Water soluble surfactans (HFPO)n-Ar'SO3Na, where Ar' is an arylene group, were also prepared by sulfonation of (HFPO)n-Ar.Some of these subtances (n = 4 - 6) decreased the surface tension of water down to 16 dyncm-1 at 20 deg C in the concentration of 10-4 - 10-5 molel-1.
- Ishikawa, Nobuo,Sasabe, Mikio
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p. 241 - 254
(2007/10/02)
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