Color forming dye precursor, composition containing the same and

Details Color forming dye precursor, composition containing the same and Color forming dye precursor, composition containing the same and

1997-09-26

2000-10-31

Kight, John

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

549224, C07D31182, C07D31178

Patent

active

061405132

ABSTRACT:
Provided is an electron donating dye precursor represented by the following formula (1), (2), (3) or (4) as defined in the specification which each singly develops two colors upon color forming reaction with one kind of an electron accepting color developer depending on change in the heat energy applied. Furthermore, a heat-sensitive recording material comprising a support and a recording layer containing said electron donating dye precursor and an electron accepting color developer is provided. Moreover, a method for heat sensitive recording of multi-color images using said heat-sensitive recording material is provided. ##STR1##

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patent: 5434272 (1995-07-01), Corrie et al.
Eda et al, Chemical Abstracts vol. 122 No. 214053, "Prep. of Fluoran Derivs. as Coloring Agents for Thermal or Press.-Sensitive Recording Materials" (1995).
"Chemistry of Functional Dyes--vol. 2", Proceedings of the Second International Symposium on Chemistry of Functional Dyes, Kobe, Aug. 23-28, 1992, edited by Yoshida, Z. and Shirota, Y., pp. 748-753.

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