Bleachable photographic sensitizing dyes

Details Bleachable photographic sensitizing dyes Bleachable photographic sensitizing dyes

1979-02-22

1980-11-04

Demers, Arthur P.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Antihalation or filter layer containing

542432, 542441, 430592, 430595, C07D32706, C07D41106, C07D40514

Patent

active

042321158

ABSTRACT:
A novel group of photographic sensitizing dyes is prepared by reacting the 5,7-dimethyl-1,2-benzoxathian-4-one-2,2-dioxide sultone nucleus with other organic compounds capable of forming merocyanine, oxonol or styryl dyes therewith. The resulting dyes are particularly useful in the sensitization of silver halide emulsions and provide excellent speed and low after-processing dye stain.

REFERENCES:
patent: 2748114 (1956-05-01), Brooker
patent: 2882159 (1959-04-01), Brooker et al.
patent: 3148065 (1964-09-01), Craig et al.
patent: 3395017 (1968-07-01), Knott
patent: 3598813 (1971-08-01), Knott
patent: 3682899 (1972-08-01), Nishio
patent: 3764322 (1973-10-01), Kampfer
Barbieri et al., Tet. Letter, 1971, #52, pp. 4913-4914.

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