Method for the coating of metallic surfaces with an aqueous...

C - Chemistry – Metallurgy – 23 – C

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C23C 22/34 (2006.01) C09D 5/12 (2006.01) C23C 22/36 (2006.01)

Patent

CA 2586684

The invention relates to a method for coating metallic surfaces with a silane/silanol/siloxane/polysiloxane-containing composition, whereby the composition essentially comprises: a) at least one compound selected from the silanes, silanols, siloxanes and polysiloxanes, b) at least two compounds selected from titanium-, hafnium-, zirconium-, aluminium- or/and boron- containing compounds, optionally c) at least one type of cation selected from cations of metals of the 1st to 3rd and 5th to 8th sub-groups including the lanthanides and the 2nd main group of the periodic table of the elements or/and at least one corresponding compound, d) at least one organic compound selected from monomers, oligomers, polymers, copolymers and block copolymers or/and e) at least one substance affecting the pH value and furthermore, f) water and g) optionally at least one organic solvent. The invention further relates to corresponding aqueous compositions.

L'invention concerne un procédé pour recouvrir des surfaces métalliques au moyen d'une composition contenant les composés silane/silanol/siloxane/polysiloxane. Selon l'invention, cette composition comprend essentiellement : a) au moins un composé sélectionné parmi des silanes, des silanols, des siloxanes, et des polysiloxanes ; b) au moins deux composés sélectionnés parmi des composés contenant du titane, de l'hafnium, du zirconium, de l'aluminium et/ou du bore, et éventuellement ; c) au moins un type de cations sélectionné parmi des cations de métaux issus du premier au troisième, et du cinquième au huitième groupe secondaire et des lanthanides, ainsi que du deuxième groupe principal de la classification périodique des éléments, et/ou au moins un composé correspondant ; d) au moins un composé organique qui est sélectionné entre des monomères, des oligomères, des polymères, des copolymères et des copolymères séquencés, et/ou ; e) au moins une substance qui influe le pH ; f) de l'eau, et ; g) éventuellement au moins un solvant organique. La présente invention se rapporte en outre à des compositions aqueuses correspondantes.

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