Patent ID: 7357960

Claim:
A process for preparing a coating on a substrate, comprising applying a coating formulation (B) which is curable to a coating having a pencil hardness according to ISO 15184 of at least HB, the coating formulation comprising at least one prepolymer (A) which bears alkoxysilane functionalities of the formula (6) —X—CH 2 —Si(OR) 3-x R′ x (6) in which R each, independently, is an alkyl, cycloalkyl or aryl radical having 1 to 6 carbon atoms, the carbon chain being uninterrupted or interrupted by non-adjacent oxygen, sulfur or NR″ groups, R′ each, independently, is an alkyl, cycloalkyl, aryl or arylalkyl radical having 1 to 12 carbon atoms, the carbon chain being uninterrupted or interrupted by nonadjacent oxygen, sulfur or NR″ groups, X is a group of the formula (20) —O—CO—NR″— (20) wherein R″ each, independently, is hydrogen, an alkyl, cycloalkyl, aryl, aminoalkyl or aspartate ester radical, and x is 0 or 1, wherein said prepolymers (A) are prepared by reaction of a silane OCN—CH 2 —Si(OR) 3-x R′ x , with a prepolymer precursor reactive therewith, and wherein the coating composition prepolymer (A) is neat or dissolved in solvent.