Use of tin derivatives as latent polycondensation catalysts...

C - Chemistry – Metallurgy – 07 – F

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C07F 7/22 (2006.01) B01J 31/12 (2006.01) C08G 18/24 (2006.01) C08K 5/57 (2006.01) C08L 83/04 (2006.01)

Patent

CA 2182617

Tin derivatives for use as oxygen-activated latent polycondensation catalysts. According to the invention, said tin derivatives have at least one tin-tin bond of the formula (I): R¿1?-Y¿n?-R¿4?, wherein R¿1? and R¿4? which can be the same or different, are selected from hydrogen, and advantageously from the hydrocarbon radicals or together form a divalent radical or a single ring-forming bond; wherein n is at least equal to 2; wherein the Y, which are the same or different, stand for a stannic grouping having the structure (a); R' and R", which can be the same or different, are selected from hydrogen and advantageously from the hydrocarbon radicals. Application to paints.

La présente invention a pour objet l'utilisation de dérivés de l'étain comme catalyseurs latents de polycondensation, activable par l'oxygène. Ces dérivés de l'étain présentant au moins une liaison étain-étain répond à la formule (I): R1-Yn-R4, où R1 et R4 qui peuvent être semblables ou différents et être choisis parmi l'hydrogène, avantageusement parmi les radicaux hydrocarbonés ou former à eux deux un radical divalent ou une unique liaison assurant la formation d'un cycle; où n est au moins égal à 2; où les Y, semblables ou différents, représentent un chaînon stannique de structure (a); R' et R" qui peuvent être semblables ou différents sont choisis parmi l'hydrogène et avantageusement les radicaux hydrocarbonés. Application aux peintures.

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