Near-infrared absorbing dyes prepared from stenhouse salts

Details Near-infrared absorbing dyes prepared from stenhouse salts Near-infrared absorbing dyes prepared from stenhouse salts

1994-03-16

1995-03-14

Brammer, Jack P.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Antihalation or filter layer containing

430510, 430517, G03C 106

Patent

active

053976908

ABSTRACT:
An improved dye class and preparation procedure therefore is provided. The dyes can be prepared from a Stenhouse salt which is economical and can be prepared from readily available reagents. The improved dye is particularly suited for use as an antihalation dye in photographic elements and does not impart deleterious properties thereto. These and other properties are provided in a dye represented by: ##STR1## wherein the constituents have defined values.

REFERENCES:
patent: 3793313 (1974-02-01), Rillaers et al.
patent: 4839265 (1989-06-01), Ohno et al.
patent: 4876181 (1989-10-01), Proehl et al.
patent: 5017707 (1991-05-01), Berneth et al.
patent: 5149619 (1992-09-01), Mihara et al.

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