Method of cleaving siloxanes

Details Method of cleaving siloxanes Method of cleaving siloxanes

C - Chemistry, Metallurgy

07

C

23/179, 260/366.

C07C 63/68 (2006.01) C01B 33/08 (2006.01) C01B 33/107 (2006.01) C07C 45/43 (2006.01) C07C 51/58 (2006.01) C07D 307/88 (2006.01) C07D 307/89 (2006.01) C07F 7/12 (2006.01)

Patent

CA 1162382

ABSTRACT OF THE DISCLOSURE A process for the preparation of a halogen silane and an aromatic compound having at least one -C = O- or Image group, while simultaneously effecting cleavage of a siloxane by contacting a compound having at least one aromatic- ally bound mono and/or dihalogen methylene group or an aromatic compound having a mono-, di and or trihalogen methyl group of the formula Image (X = Cl, Br) wherein the aromatic moiety can be optionally otherwise substi- tuted, with a siloxane of the formula : Image wherein each R moiety is independently selected from the group consisting of halogen,alkyl, alkenyl and O-SiR3, wherein such R moiety is halogen, alkyl or alkenyl, wherein at least two of the R moieties can, together with the silicon atom to which they are attached,or a ring, at an elevated temperature in the presence of a catalytic amount of a metal or a metal compound, which metal is of the sub-group of elements or of the 5th principal group of the periodic system of the elements, together with a proton donor, or in the presence of a catalytic amount of an oxygen acid.

366655

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