Aqueous silanized silica dispersion

C - Chemistry – Metallurgy – 09 – C

Patent

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Details

C09C 1/30 (2006.01) C01B 33/148 (2006.01)

Patent

CA 2754594

The present invention relates to a method of producing an aqueous dispersion of silanized colloidal silica particles comprising mixing in an aqueous medium a) at least one silane compound containing an epoxy-functionality, b) at least one silane compound having no epoxy-functionality capable of modifying colloidal silica particles; and c) colloidal silica particles in any order to form an aqueous dispersion of silanized colloidal silica particles containing silane compounds originating from a) and b). It also relates to a dispersion obtainable by said method and to the use thereof in coating applications.

La présente invention porte sur un procédé de fabrication d'une dispersion aqueuse de particules de silice colloïdale silanisée, comprenant le mélange dans un milieu aqueux a) d'au moins un composé silane contenant une fonctionnalité époxy, b) au moins un composé silane n'ayant pas de fonctionnalité époxy capable de modifier les particules de silice colloïdale ; et c) des particules de silice colloïdale, dans n'importe quel ordre pour former une dispersion aqueuse de particules de silice colloïdale silanisée contenant des composés silanes issues de a) et b). L'invention porte également sur une dispersion pouvant être obtenue par ledit procédé et sur l'utilisation de celle-ci dans des applications de revêtement.

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