FIELD: chemistry.
SUBSTANCE: invention relates to a coating agent containing (a) at least one binding substance (A) with reactive hydroxyl groups, (b) at least one cross-linking agent (B) having free and/or blocked isocyanate groups which, during cross-linking, can react with the reactive groups of the binding substance (A), and at least one catalyst (C) for the cross-linking silane groups, said catalyst being a phosphoric acid compound, specifically phosphoric acid or a phosphoric acid compound blocked with a bicyclic amine having the value pKb ≥ 3 and boiling point > 100°C. One or more components (A) and/or (B) and/or at least another component of the coating agent contain hydrolysable silane groups.
EFFECT: obtaining scratch-resistant and weather-resistant coatings.
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