Nanostructured forms and layers and method for producing...

Details Nanostructured forms and layers and method for producing... Nanostructured forms and layers and method for producing...

C - Chemistry, Metallurgy

08

G

C08G 77/14 (2006.01) C03C 1/00 (2006.01) C03C 14/00 (2006.01) C03C 17/00 (2006.01) C08G 77/20 (2006.01) C08G 77/58 (2006.01) C08K 3/36 (2006.01) C09D 4/00 (2006.01) C09D 183/04 (2006.01)

Patent

CA 2327312

The invention relates to a method for producing a composition for preparing nanostructured forms and layers, consisting of bringing an aqueous and/or alcoholic sol of a compound of an element selected from silicon and the main and sub-group metals into contact with species which have hydrolyzable alkoxy groups and which include at least one organically modified alkoxysilane or a precondensate derived therefrom, in conditions which lead to the (further) hydrolysis of the species and then removing any alcohol which has formed or which may optionally have been present originally. The invention is characterized in that enough alcohol is removed to leave a residual amount of not more than 20 wt.% in the composition.

L'invention concerne un procédé de production d'une composition destinée à la préparation de corps moulés et de couches nanostructurés. Ce procédé consiste à mettre une saumure aqueuse et/ou alcoolisée d'un composé d'un élément, choisi parmi le silicium et des métaux des groupes principaux et des sous-groupes, en contact avec des espèces qui disposent de groupes alcoxy hydrolysables et qui contiennent au moins un alcoxysilane organiquement modifié ou un précondensé dérivé de ce silane dans des conditions favorisant une hydrolyse (supplémentaire) des espèces. Ce procédé consiste ensuite à éliminer tout alcool formé et éventuellement présent initialement. Ce procédé est caractérisé en ce que l'alcool est éliminé de telle façon que la teneur en alcool résiduel de la composition ne dépasse pas 20 % en poids.

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