Polycondensation of organic silicon compounds

Details Polycondensation of organic silicon compounds Polycondensation of organic silicon compounds

C - Chemistry, Metallurgy

12

P

C12P 9/00 (2006.01)

Patent

CA 2422600

The invention relates to a method for the polycondensation of organic silicon compounds at pH values between 6 and 8 in the presence of a lipase, said lipase being optionally immobilised on a carrier consisting of polymer materials. Suitable polycondensable organic silicon compounds are (RO)(R1O)(R2O)(R3O)Si, (RO)(R1O)(R2O)(R3O)SiR3, (RO)(R1O)Si(R2)(R3) and (RO)SiR1R2R3 with R, R1, R2 and R3 independently representing C1- to C10- alkyl, C3- to C10-cycloalkyl, C4- to C20-alkylcycloalkyl, aryl, C6- to C16- alkylaryl, the alkyl groups being linear or branched. It is advantageous that the lipase can be obtained relatively easily by means of large-scale fermentation processes. Lipases from Pseudomona species are preferable.

L'invention concerne un procédé de polycondensation de composés organiques de silicium, à un pH de 6 à 8, en présence d'une lipase qui est éventuellement immobilisée sur un support en matériaux polymères. Les composés organiques de silicium pouvant faire l'objet d'une polycondensation sont (RO)(R?1¿O)(R?2¿O)(R?3¿O)Si, (RO)(R?1¿O)(R?2¿O)SiR?3¿, (RO)(R?1¿O)Si(R?2¿)(R?3¿) et (RO)SiR?1¿R?2¿R?3¿ avec R, R?1¿, R?2¿ et R?3¿, qui représentent indépendamment l'un de l'autre alkyle C¿1? à C¿10?, cycloalkyle C¿3? à C¿10?, alkylcycloalkyle C¿4? à C¿20?, aryle, alkylaryle C¿6? à C¿16?, les groupes alkyle étant linéaires ou ramifiés. La lipase est avantageusement et relativement facile à obtenir par des procédés de fermentation à grande échelle. On utilise de préférence des lipases à partir d'espèces de Pseudomonas.

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