| abstract |
A composition including:n (a) a silane derivative of the formula (I) nn nin which R 1 , R 2 , R 3 and R 4 , which may be the same or different, are selected from alkyl, acyl, alkyleneacyl, cycloalkyl, aryl and alkylenearyl, and/or a hydrolysis and/or condensation product of the silane derivative of the formula (I);n (b) a silane derivative of the formula (II)n nR 6 R 7 3−n Si(OR 5 ) n (II)n nin which R 5 is an alkyl, acyl, alkyleneacyl, cycloalkyl, aryl or alkylenearyl group, R 6 is an organic radical containing an epoxide group, R 7 is an unsubstituted or substituted alkyl, cycloalkyl, aryl or alkylenearyl group, n is 2 or 3, and/or a hydrolysis and/or condensation product of the silane derivative of the formula (II);n (c) a colloidal inorganic oxide, fluoride or oxyfluoride; (d) an epoxide compound having at least two epoxide groups, and (e) a catalyst system. |