PRESSURE-OR HEAT-SENSITIVE RECORDING MATERIAL CONTAINING 2,2-DIARYLCHROMENO COMPOUNDS

摘要

A pressure- or heat-sensitive recording material which contains as color former at least one 2,2-diarylchromeno compound of the formula IMAGE wherein V1 and V2, each independently of the other, represent hydrogen, halogen, lower alkyl or lower alkoxy, Y1 and Y2, each independently of the other, represent hydrogen, -O-R1 or IMAGE X1 and X2 , 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 IMAGE and the ring A is unsubstituted or substituted by halogen, nitro, lower alkyl, -O-R5 or IMAGE or contains a fused benzene ring, and R1, R2, R3, R4, R5 and R6, 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 R1 and R2, R3 and R4, R5 and R6, together with the nitrogen atom to which said pair is attached, forms a 5- or 6-membered heterocyclic radical.