Datalase Limited

Ciba Specialty Chemicals Corporation

Ian Street

Jonathan Campbell

John Whitworth

Robert M O'Neil

Alan Platt

Karen O'Donoghue

William Walker

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. 

Coating compositions for marking substrates

Composition, which comprises a latent activator and a colour former, a process for the preparation of these compositions, substrates coated with these compositions and a process for their preparation, a process for preparing marked substrates using these compositions and marked substrates obtainable by the latter process.

Coating composition for marking substrates

New color developers, new mixture comprising it, its processes for preparation, heat sensitive recording compositions and materials comprising the novel developers and mixtures as well as their uses in heat sensitive recording materials.

Heat sensitive recording material

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Manchester, United Kingdom

Ian Street