Patent US2406211A successfully refreshed from Google Patents.
Patent EP0251282A2 successfully refreshed from Google Patents.
EP0251282A2
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Novel infrared absorbing dyes and photographic elements containing same
Assignee: Eastman Kodak Co
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Filing: 1987-06-29
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Granted: —
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Expires: 2007-06-29
Abstract
Abstract A compound, useful as an infrared absorbing dye, having the structure: is disclosed for use in photographic elements. In this formula, R₁ and R₂ 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. R₃ and R₅ are each hydrogen or together represent the atoms necessary to complete 5- or 6-membered carbocyclic ring, and R₄ represents hydrogen, alkyl of 1 to 4 carbon atoms, aryl, cyano, halogen, or , where R₆ and R₇ 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⊕ represents a cation. Z₁ and Z₂ each independently represent the atoms needed to complete an indole, naphthindole or benzindole nucleus
Inventors
- 👤 Gary Stephen Eastman Kodak Company Proehl
- 👤 Anthony Dominic Eastman Kodak Company Gingello
- 👤 David James Eastman Kodak Company Collett
- 👤 David Alan Eastman Kodak Company Stegman
- 👤 Richard Lee Eastman Kodak Company Parton
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 18:34
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/825; G03C1/83; G03C1/832; C; C09; C09B; C09B23/00; C09B23/02; C09B23/08; C09B23/086
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
154 words
A compound having the structure: R₁ and R₂ each independently represents sulfoalkyl carboxyalkyl, or sulfatoalkyl containing 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 of each Z ring and the carboxy group. R₃ and R₅ are each hydrogen or together represent the atoms necessary to complete 5- or 6-membered carbocyclic ring, R₄ represents hydrogen, alkyl of 1 to 4 carbon atoms, aryl, cyano, halogen, or where R₆ and R₇ 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 heterocyclic ring, X⊕ represents a cation, and Z₁ and Z₂, each independently represent the atoms needed to complete an indole, naphthindole or benzindole nucleus.
Claim 2
Dependent Claim
154 words
A compound having the structure: R₁ and R₂ each independently represents sulfoalkyl carboxyalkyl, or sulfatoalkyl containing 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 of each Z ring and the carboxy group. R₃ and R₅ are each hydrogen or together represent the atoms necessary to complete 5- or 6-membered carbocyclic ring, R₄ represents hydrogen, alkyl of 1 to 4 carbon atoms, aryl, cyano, halogen, or where R₆ and R₇ 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 heterocyclic ring, X⊕ represents a cation, and Z₁ and Z₂, each independently represent the atoms needed to complete an indole, naphthindole or benzindole nucleus.
Claim 3
Dependent Claim
58 words
A compound according to Claim 1 having the structure: wherein X⊕, R₁, R₂, R₃, R₄, and R₅, are as defined in Claim 1, R₈, R₉, R₁₀ and R₁₁ each independently represent methyl or ethyl, or R₈ and R₉ or R₁₀ and R₁₁, taken together with the carbon atoms to which that are attached, may form a cycloalkyl group.
Claim 4
Dependent Claim
23 words
A dye composition comprising a dye and a deaggregant characterized in that the dye is a compound according to claims 1 or 2.
Claim 5
Dependent Claim
17 words
A dye composition according to claim 3 wherein said compound is selected from the group consisting of
Claim 6
Dependent Claim
27 words
A photographic element comprising a hydrophilic colloid layer comprising a dye composition characterized in that the dye composition is a composition according to claims 3 or 4.
Claim 7
Dependent Claim
59 words
A photographic element according to claim 5 wherein the hydrophilic colloid layer comprises from 25 to 10,000 weight percent of the deaggregant, based on the weight of said compound, and the deaggregant is selected from the group consisting of: 4,4ʹ-Bis[4,6-bis(2-chloroanilino- s -triazin-2-yl)-amino]-2,2ʹ-stilbenedisulfonic acid, disodium salt, bis[3-methyl-1-( p -sulfophenyl)-2-pyrazolin-5-one-(4)]methineoxonol, bis[3-methyl-1-( p -sulfophenyl)-2-pyrazolin-5-one-(4)]pentamethineoxonol, bis[3-carboxy-1-( p -sulfophenyl)-2-pyrazolin-5-one-(4)]trimethineoxonol disodium salt, and bis(1-butyl-3-carboxymethyl-5-barbituric acid)trimethineoxonol.
Claim 8
Dependent Claim
23 words
A photographic element according to claims 5 or 6 wherein said hydrophilic colloid layer comprises from 0.01 to 0.10 g/m² of said compound.
Claim 9
Dependent Claim
16 words
A photographic element according to claims 5-7 wherein said hydrophilic colloid layer is an antihalation layer.
References Cited (Backward Citations)
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