Composition for the production of a coating with high adhesive strength and scratch resistance

A composition configured to produce a coating using a single curing step, the composition comprising:

• (A) a first silane composition present in the composition in an amount of 5% by weight to 50% by weight wherein the first silane composition is chosen from the group consisting of:
• (a) a silane derivative of the formula (I)
• in which:
• R1, R2, R3 and R4, which may be the same or different, are selected from an alkyl, an acyl, an alkyleneacyl, a cycloalkyl, an aryl and an alkylenearyl, which may optionally be substituted,
• (b) a hydrolysis product of the silane derivative of the formula (I);
• (c) a condensation product of the silane derivative of the formula (I);
• and
• (d) mixtures thereof;
• (B) a second silane composition present in the composition in an amount of 5% by weight to 50% by weight wherein the second silane composition is chosen from the group consisting of:
• (a) a silane derivative of the formula (II)
• R6R73−nSi(OR5)n (II)
• in which:
• R5 is an unsubstituted or substituted alkyl, acyl, alkyleneacyl, cycloalkyl, aryl or alkylenearyl group,
• R6 is an organic radical containing an epoxide group,
• R7 is an unsubstituted or substituted alkyl, cycloalkyl, aryl or alkylenearyl group,
• n is 2 or 3;
• (b) a hydrolysis product of the silane derivative of the formula (II);
• (c) condensation product of the silane derivative of the formula (II);
• and
• (d) mixtures thereof;
• (C) a colloidal inorganic oxide, fluoride or oxyfluoride present in the composition in an amount of 5% by weight to 50% by weight;
• (D) an epoxide compound having at least two epoxide groups present in the composition in an amount of 0.1% by weight to 10% by weight;
• and
• (E) a catalyst system comprising:
• a Lewis acid and a thermolatent Lewis acid-base adduct present in the composition in an amount of 0.01% by weight to 5% by weight;
• Wherein the weight % of the first silane composition to the second silane composition is a ratio from 2.3 to about 0.4, wherein the composition does not comprise a catalyst for the photopolymerization of epoxides, and wherein the composition does not include a dye.