Patent ID: 8163351

Claim:
A process for coating a substrate comprising: a) applying a composition comprising: a silane of the formula (Z 1 )Si(OR) 3 , where Z 1 is R or OR and R is an alkyl radical having from 1 to 18 carbon atoms wherein all radicals R in the formula (Z 1 )Si(OR) 3 are identical or different, oxide particles selected from the group consisting of Ti, Zr, Al, Y, Sn, Zn, Ce and mixtures thereof, with bound organic radicals SiR′ 3 being present on the surface of the oxide particles, where R′ has the formula C n X 1+2n where n=1 to 20, X=hydrogen, all radicals R′ in the formula SiR′ 3 are identical or different, and the organic radicals SiR′ 3 are able to be split off, and an initiator to at least one surface of a substrate which is not natural stone and/or natural ashlar and b) drying the composition applied in a).