Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Antihalation or filter layer containing
Patent
1988-03-10
1989-10-24
Brammer, Jack P.
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Antihalation or filter layer containing
430512, 430517, 430592, 544372, 548427, G03L 184
Patent
active
048761818
ABSTRACT:
A dye useful for absorbing infrared radiation in photographic elements, having the structure: ##STR1## is disclosed. In this formula R.sub.1 and R.sub.2 each independently represents sulfoalkyl, carboxyalkyl, or sulfatoalkyl of from 3 to 6 carbon atoms, having at least 3 carbon atoms in the alkyl chain between the nitrogen atom of each Z ring and the sulfo or sulfato group, and at least 2 carbon atoms in the alkyl chain between the nitrogen atom of each Z ring and the carboxy group.
R.sub.3 and R.sub.5 are each hydrogen or together represent the atoms necessary to complete 5- or 6-membered carbocyclic ring, and R.sub.4 represents hydrogen, alkyl of 1 to 4 carbon atoms, aryl, cyano, halogen, or ##STR2## where R.sub.6 and R.sub.7 each independently represents alkyl of from 1 to 6 carbon atoms or aryl, or together represent the non-metallic atoms necessary to form a 5- or 6-membered ring.
X.sym. represents a cation.
Z.sub.1 and Z.sub.2 each independently represent the atoms needed to complete an indole, naphthindole or benzindole nucleus.
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C.A. 11846u, Chemical Abstracts, vol. 66, 1967, p. 1172, Smith.
Abstract of Japanese Patent 62123454, 1962.
Adin Anthony
Collett David J.
Gingello Anthony D.
Parton Richard L.
Proehl Gary S.
Brammer Jack P.
Eastman Kodak Company
Marshall Paul L.
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