Coating compositions with high scratch resistance and...

C - Chemistry – Metallurgy – 08 – G

Patent

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Details

C08G 18/18 (2006.01) C08G 18/28 (2006.01) C08G 18/62 (2006.01) C08G 18/73 (2006.01) C08G 18/77 (2006.01) C08G 18/79 (2006.01) C08K 3/32 (2006.01) C09D 175/04 (2006.01)

Patent

CA 2709317

The present invention relates to a coating agent comprising: (d) at least one binding agent (A) having reactive groups; (e) at least one cross-linking agent (B) that can react with the reactive groups of the binding agent (A) while cross-linking, and at least one catalyst (C) for cross-linking silane groups, one or more components (A) and/or (B) and/or at least one further component of the coating agent comprising hydrolysable silane groups, characterized in that the catalyst (C) is a phosphoric acid compound blocked with an amine having a pK b value >= 3 and a boiling point > 1000°C, particularly phosphoric acid or phosphonic acid.

L'invention concerne un produit de revêtement contenant : (a) au moins un liant (A) avec des groupes réactifs ; (b) au moins un réticulant (B) qui peut réagir avec les groupes réactifs du liant (A) en effectuant une réticulation ; et au moins un catalyseur (C) pour la réticulation de groupes silane, sachant qu'un ou plusieurs composants (A) et/ou (B), et/ou au moins un autre composant du produit de revêtement, contiennent des groupes silane hydrolysables. Selon l'invention, le catalyseur (C) est un composé d'acide phosphorique, en particulier de l'acide phosphorique ou de l'acide phosphonique, bloqué avec une amine ayant une valeur pKb = 3 et un point d'ébullition > 1000°C.

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