C - Chemistry – Metallurgy – 07 – F
Patent
C - Chemistry, Metallurgy
07
F
260/446.6
C07F 7/10 (2006.01) C07F 7/08 (2006.01)
Patent
CA 1313191
- 1 - Abstract: The invention relates to a process suitable for producing oximosilanes having the general formula (I) R1a Si(O-N=CR2R3)4-a (I) wherein R1 represents a straight-chain or branched alkyl residue having between 1 and 18 carbon atoms, a straight- chain or branched alkenyl residue having between 2 and 18 carbon atoms, an aryl or aralkyl residue optionally sub- stituted by one or more members of the group consisting of halogens, nitro groups, amino groups and alkyl residues having between 1 and 4 carbon atoms, or a straight-chain or branched alkoxy-residue having between 1 and 8 carbon atoms, a is an integer of 0 to 3, and R2 and R3, independently of each other, represent straight-chain or branched alkyl residues having between 1 and 18 atoms, optionally substi- tuted by one or more members of the group consisting of halogens, nitro groups, amino groups and alkyl residues having between 1 and 4 carbon atoms. The process involves reacting an acyloxisilane having the general formula (II) R1a Si(OCOR4)4-a (II) wherein R1 and a have the above mentioned significations and R4 represents straight-chain or branched alkyl residues having between 1 and 18 carbon atoms, preferably between 2 and 8 and more preferably between 2 and 4 carbon atoms, straight-chain or branched alkenyl residues having between 2 and 18 carbon atoms or aryl or aralkyl residues optionally substituted with one or more members of the group consisting of halogens, nitro groups, amino groups and alkyl residues having between 1 and 4 carbon atoms, with a molar excess of a ketoxime having the general formula (III) Image (III) wherein R2 and R3 possess the above significations, in the absence of an acid acceptor, while distilling off the carboxylic acid, which is released from the acyloxisilane of the general formula (II).
558261
Haring Horst
Kirby Eades Gale Baker
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