Pressure-sensitive or heat-sensitive recording material containing a carbazolyl methane compound

Abstract

The present invention provides a pressure- or heat-sensitive recording material which contains in its color forming system at least one carbazolylmethane compound of the formula ##STR1## wherein Y is an amino-substituted phenyl radical of the formula ##STR2## OR AN INDOLYL RADICAL OF THE FORMULA ##STR3## IN WHICH FORMULAE EACH OF X.sub.1 and X.sub.2 is hydrogen, alkyl of at most 12 carbon atoms which is unsubstituted or substituted, cycloalkyl, phenyl, benzyl, substituted phenyl or substituted benzyl, or X.sub.1 and X.sub.2 together with the nitrogen atom to which they are attached represent a 5- or 6-membered, heterocyclic radical, X.sub.3 is hydrogen, halogen, nitro, lower alkyl or lower alkoxy, each of R.sub.1 and Z.sub.1 is hydrogen, alkyl of not more than 12 carbon atoms which is unsubstituted or substituted; acyl of 1 to 12 carbon atoms, phenyl, benzyl, substituted phenyl or substituted benzyl, and Z.sub.2 is hydrogen, lower alkyl or phenyl, and the rings A, B and D independently can be further substituted. This material yields copies of improved color intensity and lightfastness.

Dependencies are inferred from the claim text.