Heat-sensitive recording material containing a malachite green color former

摘要

A heat-sensitive recording material which contains as color former at least one compound of the general formula (1) wherein R1 and R2, which can be the same or different, represent hydrogen, alkyl of at most 12 carbon atoms which is unsubstituted or substituted by cyano or halogen, alkoxyalkyl of 2 to 8 carbon atoms, benzyl or phenyl, R3 represents hydrogen, halogen, nitro, alkyl of 1 to 4 carbon atoms or alkoxy of 1 to 4 carbon atoms, and Z represents alkenyl of at most 12 carbon atoms, unsubstituted or ring-substituted aralkyl or aralkenyl, or represents the radical of a reactive organic methylene compound or of a heterocyclic compound which does not contain active methylene groups.