Fluoran compounds, crystalline toluene adducts thereof, recordin

Details Fluoran compounds, crystalline toluene adducts thereof, recordin Fluoran compounds, crystalline toluene adducts thereof, recordin

1993-03-29

1994-06-28

Shah, Mukund J.

Record receiver having plural interactive leaves or a colorless

Having a colorless color-former, developer therefor, or...

Identified color-former

503221, 549223, 549224, 549226, B41M 520, C07D31178

Patent

active

053247043

ABSTRACT:
Disclosed are novel fluoran compounds represented by the formula (I): ##STR1## wherein R.sub.1 and R.sub.2 are different groups selected from cyclohexyl, n-butyl and isobutyl, e.g., in the form of crystals characterized by a specific X-ray diffraction diagram; crystalline toluene adducts thereof; and recording materials containing these fluoran compounds.

REFERENCES:
patent: 4694088 (1987-09-01), Kaneko et al.
patent: 5194632 (1993-03-01), Nakatsuka et al.

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