Fluoran derivatives and recording material containing the same

Details Fluoran derivatives and recording material containing the same Fluoran derivatives and recording material containing the same

1986-10-08

1989-05-23

Raymond, Richard L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

549225, 549226, C07D31188, C07D31196

Patent

active

048332569

ABSTRACT:
A fluoran derivative useful for a heat-sensitive recording material, having the following general formula I; ##STR1## wherein R.sub.1 and R.sub.2, which may be the same or different, stand for an alkyl group having 1 to 9 carbon atoms, a cycloalkyl group having 3 to 6 carbon atoms, a phenyl group or a phenyl group substituted by an alkyl group having 1 to 4 carbon atoms, and R.sub.3 and R.sub.4, which may be the same or different, stand for an alkyl group having 1 to 6 carbon atoms or a phenyl group or R.sub.3 and R.sub.4 may form a 5- to 8-membered cycloalkane together with the carbon atom to which they are bonded.

REFERENCES:
patent: 3925416 (1975-12-01), Akamatsu et al.
patent: 4012419 (1977-03-01), Vincent et al.
patent: 4410708 (1983-10-01), Yahagi et al.
patent: 4603202 (1986-07-01), Moyer et al.
patent: 4612558 (1986-09-01), Anzai et al.
patent: 4694088 (1987-09-01), Kaneko et al.

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