Coating compositions for marking substrates

Abstract

The present invention provides coating compositions for marking substrates, which comprises a color former, an amine salt of an organic metal compound, a binder, a solvent, and optionally additional components, wherein the amine salt of the organic metal compound is of formula (I) in which X is silicon or boron, and E and F are the same or different and are selected from the group consisting of a, b, c, d, e, f, g, h in which Rand Rare the same or different are hydrogen, C-alkyl, C-alkoxy, halogen, amino or carboxy, and for X=silicon o=1 and p=0, and Ris aryl, aralkyl or C-alkyl, or o=1 and p=1, and Rand Rtogether form a one residue selected from the group consisting of a, b, c, d, e, f, g and h, and for X=boron o=0 and p=0, and R, Rand Rare the same or different and are hydrogen, C-alkyl, C-hydroxyalkyl, allyl, aralkyl or arylsulfonyl, in which aralkyl or arylsulfonyl can be substituted with C-alkyl, or Rand Rtogether with the nitrogen to which they are attached form a morpholino or piperidino ring. The present invention also provides a process for the preparation of the composition of the present invention, substrates coated with these compositions, a process for preparing coated substrates, a process for preparing a marked substrate using these compositions, a marked substrate obtainable by the latter process and amine salts of the organic metal compounds of formula I.