Patent ID: 7250219

Claim:
A multilayered article comprising: (1) a substrate (S); (2) a scratch-resistant layer (SR) prepared by curing a scratch-resistant coating composition consisting of a polycondensate prepared from at least one silicon-containing compound, said polycondensate being prepared by a sol-gel process, wherein said at least one silicon containing compound is selected from the group consisting of 1) methylsilane; 2) methyltrimethoxysilane, methyltrihydroxysilane and mixtures thereof; 3) silyl acrylates according to the formula in which R 3 and R 4 are identical or different monovalent hydrocarbon radicals, R 5 is a divalent hydrocarbon radical having 2 to 8 carbon atoms, R 6 denotes hydrogen or a monovalent hydrocarbon radical, the index b is an integer having a value from 1 to 3, the index c is an integer having a value from 0 to 2 and the index d is an integer having a value of(4-b-c); 4) silylacrylates comprising nanoscale AIO(OH) particles; and 5) cyclic organosiloxanes according to the formula where m=3 to 6, R=C 1 to C 8 -alkyl and/or C 6 to C 14 -aryl, wherein the m-plurality of n's and R's within the molecule may be identical or different ; and (3) a top layer (T) prepared by curing a top layer coating composition prepared by hydrolysing a composition consisting of (a) at least one compound represented by general formula I, M(R′) m (I) wherein M is an element or compound selected from the group consisting of Si, Ti, Zr, Sn, Ce, Al, B, VO 3+ , In and Zn, R′ represents a hydrolysable radical, and m is an integer from 2 to 4; and (b) optionally at least one compound represented by general formula II, R b SiR′ a , (II) wherein the radicals R′ and R are the same or different, R′ is as defined for general formula (I), R represents a group selected from an alkyl group, an alkenyl group, an aryl group, a hydrocarbon group with at least one halogen group, an epoxide group, a glycidyloxy group, an amino group, a mercapto group, a methacryloxy group and a cyano group, and a and b independently of one another have a value from 1 to 3, provided that the sum of a and b is four and with the proviso that when a compound of formula II is present, it is not a methyltrimethoxysilane or methyltrihydroxysilane: and (c) optionally one or more additives selected from the group consisting of water, acid, solvent, dyestuffs, flow control agents, UV stabilizers, IR stabilizers, photoinitiators and photosensitizers, wherein said scratch-resistant layer is interposed between said substrate and said top layer.