Patent ID: 6545115
Filing Date: 2003-04-08
Classification: C03C,C08G

Abstract:
A process for the preparation of a stable silicone oil containing â‰¡SiH groups, starting with reagents which are a first silicone oil containing â‰¡SiH groups and monomers, this process comprising the steps of:(a) adding in a reactor an amount of from 5 to 5000 ppm, of heterogeneous catalytic composition relative to the total mass of the reagents; (b) adding said first silicone oil in said reactor; (c) heating to a temperature of between 25Â° C. and 200Â° C.; then (d) adding the monomers over a period of time of between 0 and 24 hour in said reactor, the monomer/â‰¡SiH molar ratio of said oil being between 0.0001 and 1; then (e) separating the silicone oil obtained containing â‰¡SiH groups from the heterogeneous catalytic composition; and (f) finally devolatilizing the silicone oil containing â‰¡SiH groups to obtain the stable silicone oil; said monomers having the formula: wherein:the symbols R1 and R2, being identical or different, are a hydrogen atom, a phenyl radical or a linear or branched alkyl radical containing from 1 to 12 carbon atoms; the symbol Y corresponds to Yâ€²-Yâ€³-Yâ€² wherein: the symbol Yâ€³ is a divalent radical selected from the group consisting of: â€”(C&boxH;O)â€”, â€”(NH)â€”, â€”Oâ€”, â€”(C&boxH;O)â€”Oâ€”, â€”NHâ€”(C&boxH;O)â€”, and a free valency, the symbols Yâ€², being identical or different, is a divalent hydrocarbon-radical selected from the group consisting of linear alkyl radicals containing from 1 to 6 carbon atoms, branched alkyl radicals containing from 1 to 6 carbon atoms, and a free valency, optionally one of the radicals Yâ€² being a phenyl radical or an alkylaryl radical wherein the linear or branched alkyl part of the alkylaryl radical comprises 1 to 6 carbon atoms. wherein:the symbol Z is a monovalent radical â€”NHR4 or OH, the symbols R3 and R4, being identical or different, are a hydrogen atom, a phenyl radical or a linear or branched alkyl radical containing from 1 to 12 carbon atoms; the symbol Y corresponds to Yâ€²-Yâ€³-Yâ€², wherein: the symbol Yâ€³ is a divalent radical selected from the group consisting of: â€”(C&boxH;O)â€”, â€”(NH)â€”, â€”Oâ€”, â€”(C&boxH;O)â€”Oâ€”, â€”NHâ€”(C&boxH;O)â€” and a free valency, the symbols Yâ€², being identical or different, are a divalent hydrocarbon-based radical selected from the group consisting of linear alkyl radicals containing from 1 to 6 carbon atoms, branched alkyl radicals containing from 1 to 6 carbon atoms, and a free valency, optionally one of the radicals Yâ€² being a phenyl radical or an alkylaryl radical wherein the linear or branched alkyl part of the alkylaryl radical comprises 1 to 6 carbon atoms, in which:the symbol U is a divalent radical selected from the group consisting of: â€”NHâ€”, â€”(C&boxH;O)â€”, â€”(C&boxH;O)â€”NHâ€”, and â€”(C&boxH;O)â€”Oâ€”(C&boxH;O)â€”, the symbol R5 is a hydrogen atom, a phenyl radical and linear or branched alkyl radicals containing from 1 to 12 carbon atoms; the symbols W1 and W2, being identical or different, is a divalent hydrocarbon-based radical selected from the group consisting of a phenyl radical, linear alkyl radicals containing from 1 to 12 carbon atoms, branched alkyl radicals containing from 1 to 12 carbon atoms, alkylaryl radicals wherein the linear or branched alkyl part of the alkylaryl radical comprises 1 to 6 carbon atoms, and a free valency, the symbol Y corresponds to Yâ€²-Yâ€³-Yâ€², wherein: the symbol Yâ€³ is a divalent radical selected from the group consisting of: â€”(C&boxH;O)â€”, â€”(NH)â€”, â€”Oâ€”, â€”(C&boxH;O)â€”Oâ€”, â€”NHâ€”(C&boxH;O)â€”, and a free valency. the symbols Yâ€², being identical or different, is a divalent hydrocarbon-based radical selected from the group consisting of linear alkyl radicals containing from 1 to 6 carbon atoms, branched alkyl radicals containing from 1 to 6 carbon atoms, and a free valency, optionally one of the radicals Yâ€² being a phenyl radical or an alkylaryl radical wherein the linear or branched alkyl part comprises 1 to 6 carbon atoms,