EASY-TO-CLEAN, MECHANICALLY STABLE COATING COMPOSITION FOR METALLIC SURFACES WITH INCREASED CHEMICAL RESISTANCE AND PROCESS FOR COATING A SUBSTRATE USING SAID COMPOSITION

摘要

The present invention is directed to an optically clear coating made from a composition comprising a triazine ring containing silane resin. The coating is obtained on a metallic substrate and has a unique combination of properties that includes a rigid structure, hydrophobicity/easy-to-clean, adhesion to bright chrome, abrasion resistance and high chemical resistance. The coating composition comprises (A) a mixture of at least one hydrolysable silane and one hydrolysable metal compound, the compounds of said mixture being partly or fully hydrolyzed and partly or fully condensed, and (B) at least one triazine ring derivative, selected from derivatives having formula (C(O)N)₃(R⁴D)₃ and derivatives having formula (C(O)N)₃(R⁵P)_p(R⁴D)3-p, wherein R⁴ is selected from optionally substituted n- or isoalkylene groups, D is OH, in case mixture (A) comprises a silane having a (protected) isocyanato group, or is NCO, in case mixture (A) comprises a silane having a hydroxy group, R⁵ is independently selected from optionally substituted n- or isoalkylene groups, P is (-P'R⁴) (C(O)N)₃(R⁴D)₂ wherein P' is an alkylene, alkylenearylenealkylene, alkylenearylene or arylene group which can be substituted and/or wherein the carbon chain may be interrupted with a variety of atoms or groups, and p is 1 or 2.