Azo dye salts useful as masking couplers and preparation thereof

Details Azo dye salts useful as masking couplers and preparation thereof Azo dye salts useful as masking couplers and preparation thereof

1991-05-15

1993-08-31

Lee, Mary C.

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

Organic compounds

Azo

534573, 534581, 534651, 534781, 534786, 534887, C09B 2950, C09B 4100, G03C 730

Patent

active

052410587

ABSTRACT:
Azo dye salts corresponding to formula I are suitable as masking couplers. ##STR1## In Formula I, A denotes an optionally substituted aryl group;

REFERENCES:
patent: 3576635 (1971-04-01), Sakamoto et al.
patent: 3677764 (1972-07-01), Glockner et al.
patent: 3993638 (1975-06-01), Fleckenstein
patent: 4004929 (1977-01-01), Orvis
patent: 5075207 (1991-12-01), Langen et al.
Saunders, "The Aromatic Diazo Compounds and Their Technical Applications", 2nd ed., Edward Arnold & Co., London, 1949, pp. 18-20.

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