| abstract |
The present invention provides coating compositions for labeling substrates, comprising a color former, an amine salt of an organic metal compound, the binder, a solvent, and optionally additional components, wherein the amine salt of the organic metal compound is of the formula (see formula) in which X is silicon or boron, and E and F are the same or different and are selected from the group consisting of (see formula) in which R6 and R7 are the same or different and are hydrogen, C1-4-alkyl, C1-4-alkoxy, halogen, amino or carboxy, and for X = silicon, o = 1 and p = 0, and R1 is aryl, aralkyl or C1-4-alkyl, oo = 1 and p = 1, and R1 and R2 together form a residue selected from the group consisting of a, b, c, d, e, f, gyh, and for X = boron, o = 0 and p = 0, and R3, R4 and R5 they are the same or different and are hydrogen, C1-12-alkyl, C1-6hydroxyalkyl, allyl, aralkyl or arylsulfonyl, in which aralkyl or arylsulfonyl may be substituted uids with C1-4-alkyl, or R3 and R4 together with the nitrogen to which they bind 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 labeled substrate using these compositions, a labeled substrate obtainable by this latter process and amine salts of the organic metal compounds of formula I. |