Process for the preparation of fluorinated polyethers

Details Process for the preparation of fluorinated polyethers Process for the preparation of fluorinated polyethers

C - Chemistry, Metallurgy

08

F

C08F 16/24 (2006.01) C07C 41/30 (2006.01) C07C 43/12 (2006.01)

Patent

CA 2073359

HOE 91/F 217 Abstract of the disclosure: Process for the preparation of fluorinated polyethers The invention relates to a process for the preparation of fluorinated polyethers of the formula I Rf-O-(C2F4)-(C2F4)-O-Rf (I) in which Rf is a straight-chain, branched or cyclic fluoroalkyl or fluoroalkyl ether radical and the two (C2F4) groups, independently of each other, have the structure (CF2-CF2) or (CF(CF3)), from fluorovinyl ethers of the formula II Rf-O-CF=CF2 (II) in which Rf has the same meaning as in formula I. For this, the liquid fluorovinyl ether (II), or the fluorovinyl ether (II) dissolved in an inert solvent is reacted with gaseous elemental fluorine, which is used undiluted or diluted with an inert gas, at a temperature of from -80 to 200°C.

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