Basf Coatings Ag

Manuela Armbrust

Peter Betz

Horst Hintze-Br&uuml;ning

Wilfried St&uuml;bbe

Christel Ehlig

Wolfgang Bremser

A sol-gel coating material, containing (A) an acrylate copolymer solution, consisting of at least one acrylate copolymer; (B) a parent lacquer which can be produced by the hydrolysis and condensation of at least one hydrolysable silane of the formula (I): SiR ; wherein: R&equals;hydrolysable groups, hydroxy groups and non-hydrolysable groups, with the proviso that there should be at least one hydrolysable group; and (C) a sol which can be produced by the hydrolysis, condensation and complexing of (C1) at least one hydrolysable metal compound of the (II): MR ; wherein: M&equals;aluminium, titanium or zirconium, R&equals;the aforementioned given groups and n&equals;3 or 4; of (C2) at least one organic thio compound of the formula (III): S(R X) , wherein R represents a two-bond organic radical and X represents hydroxyl, thiol and/or primary and/or secondary amino groups; and of (C3) a hydrolysable silane of the general formula (I).

Sol-gel coating

The invention relates to a sol-gel coating material, containing (A) an acrylate copolymer solution, consisting of at least one acrylate copolymer (A1), (B) a sol which can be produced by the hydrolysis, condensation and complexing of at least one hydrolysable metal compound (B1) of the dormula (1): MR ; wherein the variable and the index have the following meanings: M&equals;aluminium, titanium or zirconium; R&equals;hydrolysable group, hydroxy groups and non-hydrolysable groups, with the proviso that there should be at least one, preferable two hydrolysable groups; and n&equals;3 or 4; by the hydrolysis, condensation and complexing of at least one hydrolysable silane (B2) of the formula (II): Si(R ) (R ) ; wherein the varible R and R have the following meanings: R &equals;alkyl and/or cycloalkyl radicals and R &equals;alkoxy and/or cycloakoxy radicals; and by the hydrolysis, condensation and complexing of at least one hydrollysable silane (B3) of the formula (III): SiR ; wherein the variable R has the aforementioned given meaning: with the proviso that the silane (B3) is not a silane (B2) according to the general formula (II); and (C) between 0 and 40% by weight in relation to the total quantity of the coating material, of a parent lacquer which can be produced by the hydrolysis and condensation of least one hydrolysable silane (B3) of general formula (III).

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Münster, Germany

Manuela Armbrust