The invention relates to novel fluoran compounds of the general formula ##STR1## wherein R.sub.1 and R.sub.2, each independently of the other, are lower alkyl; A is ##STR2## or a pyrrolidinyl, piperidino, morpholino or piperazino radical; and R.sub.3 and R.sub.4, each independently of the other, are C.sub.1 -C.sub.12 alkyl, cycloalkyl, phenyl or phenyl substituted by lower alkyl or lower alkoxy. These compounds are particularly suitable for use as color formers in pressure-sensitive or heat-sensitive recording materials.
本发明涉及一种新型的
氟兰化合物,其通式为##STR1##其中R.sub.1和R.sub.2各自独立地为低碳基;A为##STR2##或
吡咯烷基、
哌啶基、吗啉基或
哌嗪基;R.sub.3和R.sub.4各自独立地为C.sub.1-C.sub.12烷基、环烷基、苯基或被低碳基或低碳氧基取代的苯基。这些化合物特别适用于作为压敏或热敏记录材料中的色形成剂。