Fluoran color formers

Details Fluoran color formers Fluoran color formers

1993-03-10

1995-03-07

Raymond, Richard L.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

503221, 544150, 544359, 546187, 548517, C07D31188, C07D41312, C07D40300, B41M 520

Patent

active

053959485

ABSTRACT:
The invention relates to fluoran colour formers having improved fastness to sublimation and migration stability, to their preparation, to pressure-sensitive and heat-sensitive recording materials containing said compounds and to their preparation. The fluorans have the formula (I) as defined in claim 1.

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patent: 3627787 (1971-12-01), Lin
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patent: 3641011 (1972-02-01), Lin
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patent: 3715226 (1973-02-01), Lin
patent: 3730755 (1973-05-01), Lin
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patent: 3769057 (1973-10-01), Lin
patent: 3769302 (1973-10-01), Hoover et al.
patent: 3910956 (1975-10-01), Hoover
patent: 4028357 (1977-06-01), Crounse
patent: 4728633 (1988-03-01), Satomura et al.

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