Color-forming sulfonamidodiphenylamine dye precursor that produc

Details Color-forming sulfonamidodiphenylamine dye precursor that produc Color-forming sulfonamidodiphenylamine dye precursor that produc

1981-07-06

1983-04-19

Waltz, Thomas A.

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

Organic compounds

Amino nitrogen containing

260401, C07C14375

Patent

active

043806660

ABSTRACT:
A color-forming para sulfonamidodiphenylamine dye precursor has one or two sulfonamido groups in positions ortho to the amine --NH-- moiety separating the two phenyl rings of the para sulfonamidodiphenylamine and, in oxidized form, intramolecularly reacts to produce a sulfonamido-substituted phenazine dye. Such color-forming para sulfonamidodiphenylamine dye precursors are useful to produce a dye image by cross-oxidation in an imaging material.

REFERENCES:
patent: 3482971 (1969-12-01), Bloom et al.
patent: 3498785 (1970-03-01), Bloom et al.
patent: 3622603 (1971-11-01), Bloom et al.
patent: 3658524 (1972-04-01), Piesach
patent: 3821200 (1974-06-01), Stingl
patent: 3938995 (1976-02-01), Gompf et al.
patent: 4110355 (1978-08-01), Bloom

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