Optimized process for inert fluorinated silanes

Details Optimized process for inert fluorinated silanes Optimized process for inert fluorinated silanes

C - Chemistry, Metallurgy

07

F

C07F 7/08 (2006.01) C07F 7/14 (2006.01)

Patent

CA 2150308

The present invention provides a method for preparing a fluorinated silane having the formula R14Si (I) or the formula R23Si(R3SiR42)zR3SiR23 (II) said method comprising reacting the corresponding halide- functional or alkoxy-functional silane with lithium aluminum hydride or sodium borohydride to form a hydride-functional silane and then reacting the latter with a vinyl-terminated fluorotelomer or an allyl-terminated fluorotelomer, wherein at least three R1 of said silane (I), at least two of the R2 and at least one R4 of said silane (II) are selected from derivatives of fluorotelomers or fluorocotelomers, z has an average value of 0 to 4 and R3 is a derivative of an alkylene-terminated telechelic divalent telomer or cotelomer.

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