Pressure-sensitive or heat-sensitive recording material and novel 2,2-diarylchromeno compounds used therein

Abstract

A pressure- or heat-sensitive recording material which contains as color former at least one 2,2-diarylchromeno compound of the formula ##STR1## wherein V.sub.1 and V.sub.2, each independently of the other, represent hydrogen, halogen, lower alkyl or lower alkoxy, Y.sub.1 and Y.sub.2, each independently of the other, represent hydrogen, --O--R.sub.1 or ##STR2## X.sub.1 and X.sub.2 , each independently of the other, represent hydrogen, alkyl of up to 12 carbon atoms which is unsubstituted or substituted by halogen, or represent benzyl, phenyl, or benzyl or phenyl which is substituted by halogen, nitro, lower alkyl, lower alkoxy or the amino group ##STR3## and the ring A is unsubstituted or substituted by halogen, nitro, lower alkyl, --O--R.sub.5 or ##STR4## or contains a fused benzene ring, and R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6, each independently of the other, represent alkyl of not more than 12 carbon atoms which is unsubstituted or substituted by halogen hydroxyl, cyano or lower alkoxy, or represents cycloalkyl, phenyl, benzyl, or phenyl or benzyl which is substituted by halogen, nitro, lower alkyl or lower alkoxy, or each of the pair of substituents R.sub.1 and R.sub.2, R.sub.3 and R.sub.4, R.sub.5 and R.sub.6, together with the nitrogen atom to which said pair is attached, forms a 5- or 6-membered heterocyclic radical.

Dependencies are inferred from the claim text.