Fluoran derivatives as new compounds, process for preparing the

Details Fluoran derivatives as new compounds, process for preparing the Fluoran derivatives as new compounds, process for preparing the

1983-02-17

1985-06-18

Hess, Bruce H.

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Record receiver deforming

346217, 427151, B41M 518, S41M 522

Patent

active

045243735

ABSTRACT:
A new fluoran derivative useful as a colorless chromogenic material has the general formula: ##STR1## wherein R.sub.1, R.sub.2, X, Y and Z have the same meaning as defined hereinbefore.

REFERENCES:
patent: 3681390 (1972-08-01), Lin
patent: 3746562 (1973-07-01), Lin
patent: 3764369 (1973-10-01), Hoover et al.
patent: 3769302 (1973-10-01), Hoover et al.
patent: 3920510 (1975-11-01), Hatano et al.

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