C - Chemistry – Metallurgy – 07 – F
Patent
C - Chemistry, Metallurgy
07
F
C07F 7/18 (2006.01) C07F 7/04 (2006.01)
Patent
CA 2258104
The invention pertains to a method of preparing alkoxy silanes containing alkoxy radicals with 6 to 38 carbon atoms by means of transesterification of alkoxy silanes whose alkoxy groups have 1 to 4 carbon atoms, using higher linear and/or branched alcohols with 6 to 38 carbon atoms, in the presence of base or acid catalysts at a pressure of 1 to 800 hPa and a temperature of 25 to 150° C and with constant removal of the resulting alcohol with 1 to 4 carbon atoms, the pressure and temperature in the transesterification being selected so that the higher alcohols used and the silanes do not boil.
L'invention concerne un procédé de préparation d'alcoxysilanes contenant des radicaux alcoxy comportant 6 à 38 atomes de carbone. Ledit procédé consiste à réaliser une transestérification d'alcoxysilanes, dont les groupes alcoxy comportent 1 à 4 atomes de carbone, avec des alcools supérieurs linéaires et/ou ramifiés comportant 6 à 38 atomes de carbone, en présence de catalyseurs basiques ou acides, à une pression de 1 à 800 hPa et une température de 25 à 150 DEG C, avec élimination constante de l'alcool produit, comportant 1 à 4 atomes de carbone. La température et le pression lors de la transestérification sont sélectionnées de manière que l'alcool supérieur utilisé et les silanes ne bouillent pas.
Blueml Walter
Weidner Richard
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Wacker-Chemie Gmbh
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