Rhodia Chimie

Nicholas Noiret

Jean-Marc Frances

Jean-Marie Bernard

Michel Pereyre

Bernard Jousseaume

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 &mdash;Y &mdash;R wherein R and R 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 (s): R&prime; and R&Prime;, which can be the same or different, are selected from hydrogen and advantageously from the hydrocarbon radicals. Application to paints.

Use of tin derivatives as latent polycondensation catalysts, and premix containing them

Tin derivatives for use as oxygen-activated latent polycondensation catalysts. Said tin derivatives having a formula R,-Y,-R,, wherein R,and R,together form a divalent group or a single bond which insures the formation of a ring with n being 5, 6 or 7, the radicals Y, which may be similar or different, represent a tin-membered chain unit of a structure R&prime;-Sn-R&Prime;, wherein R&prime; and R&Prime;, which may be similar or different are a hydrogen or a hydrocarbon radical.

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Chevaigne, France

Nicholas Noiret