Silane-based coating composition

A coating composition comprising

• (A) one or more resins of formula (I)
• R—[NH—CO—NR1—R2—Si(Ra)3-x(Rb)x]y (I)
• wherein:
• R is an aliphatic hydrocarbyl group, optionally containing one or more moieties selected from the group consisting of isocyanurate groups, uretdione groups, iminooxadiazinedione groups, allophanate groups and biuret groups;
• R1 is an alkyl group containing 1 to 10 carbon atoms,
• R2 is an alkylene group containing 1 to 6 carbon atoms,
• Ra is an alkoxy group containing 1 to 4 carbon atoms,
• Rb is an alkyl group containing 1 to 4 carbon atoms or an alkoxy group containing 1 to 4 carbon atoms,
• x is 0 or 1, and
• y is 2 to 5;
• and
• wherein the one or more resins of formula (I) have an NCO content of 0%;
• (B) one or more catalysts of formula (II)
• z[H3C—C(Rc)(Rd)—C(═O)—O−]Mz+ (II)
• wherein
• Rc and Rd independently are hydrogen or alkyl groups containing 1 to 6 carbon atoms, with the proviso that the sum of the number of carbon atoms in residues Rc and Rd ranges from 2 to 7;
• and z=1 to 4;
• with the proviso that,
• if z=1, then M is selected from the group consisting of Li, K and Na;
• if z=2, then M is selected from the group consisting of Zn and Zr;
• if z=3, then M is selected from the group consisting of Bi and Al;
• if z=4, then M is selected from the group consisting of Zr and Ti;
• and
• (C) one or more aprotic organic solvents.