Method for producing a scratch-proof coating having improved alkali resistance

摘要

Composition comprises: (a) a silane derivative (I) and/or hydrolysis- or condensation product of (I); (b) a silane derivative (II) and/or hydrolysis- or condensation products of (II), (c) a colloidal inorganic oxide, fluoride or oxyfluoride; (d) a cycloaliphatic or aromatic epoxide compound comprising at least two epoxide groups; and (e) a solvent comprising an alcohol, ether and/or ester. Composition comprises: (a) a silane derivative of formula R 3>O-Si(OR 2>)(OR 4>)-OR 1>) (I) and/or hydrolysis- or condensation product of (I); (b) a silane derivative of formula (R 6>(R 7>) 3 - nSi(OR 5>) n) (II) and/or hydrolysis- or condensation products of (II); (c) a colloidal inorganic oxide, fluoride or oxyfluoride; (d) a cycloaliphatic or aromatic epoxide compound comprising at least two epoxide groups; and (e) a solvent comprising an alcohol, ether and/or ester. R 1>-R 5> : alkyl, acyl, alkyleneacyl, cycloalkyl, aryl or alkylenearyl (all optionally substituted); R 6> : organic residue comprising epoxide; R 7> : optionally substituted alkyl, cycloalkyl, aryl or alkylenearyl; and n : 2 or 3. Independent claims are also included for: (1) coating a substrate comprising providing the composition, applying the composition on the substrate and treating the substrate at 75-150[deg] C for curing the coating; and (2) an article comprising the substrate and a coating on the substrate surface, where the coating is obtained by the above mentioned method.