US4414307A
Expired / Lapsed
US
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Method and composition for preparation of photographic color developing solutions
Assignee: Eastman Kodak Co
•
Filing: 1982-02-24
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Granted: 1983-11-08
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Expires: 2002-02-24
Abstract
Abstract Sparingly-soluble alcohols, such as benzyl alcohol, which function to enhance photographic coupling efficiency are incorporated in photographic color developing solutions by the use of solid water-soluble alcohol-precursor compounds. The solid precursor compounds, which can be advantageously utilized as components of an all-solid photographic processing kit, comprise a solubilizing group which is cleaved by the alkaline environment of the color developing solution to form the sparingly-soluble alcohol. Examples of such solid precursor compounds which are especially advantageous in the preparation of color developing solutions are the alkali metal monobenzylcarbonates and the alkali metal monobenzylsulfites.
Inventors
- 👤 Jon A. Kapecki
- 👤 Thomas M. Gormel
- 👤 Sheridan E. Vincent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:38
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/29; G03C5/305; G03C5/264; G03C7/00; G03C7/30; G03C7/407; G03C7/413; Y; Y10; Y10S; Y10S430/00; Y10S430/156
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
136 words
A method of preparing a working strength aqueous alkaline photographic color developing solution that functions to generate image dyes in a photographic element by the coupling reaction of an oxidized color developing agent with a photographic coupler and that contains a sparingly-soluble alcohol which serves to enhance coupling efficiency, said method comprising admixing together and dissolving in an aqueous medium a plurality of photographic processing agents, one of said agents being a primary aromatic amino color developing agent, a second of said agents being an alkaline agent, and a third of said agents being a solid water-soluble alkali-cleavable precursor of a sparingly-soluble alcohol that is cleaved by the alkaline environment of said color developing solution, whereby said sparingly-soluble alcohol is formed when said plurality of processing agents are admixed together and dissolved in said aqueous medium.
Claim 2
Independent Claim
136 words
A method of preparing a working strength aqueous alkaline photographic color developing solution that functions to generate image dyes in a photographic element by the coupling reaction of an oxidized color developing agent with a photographic coupler and that contains a sparingly-soluble alcohol which serves to enhance coupling efficiency, said method comprising admixing together and dissolving in an aqueous medium a plurality of photographic processing agents, one of said agents being a primary aromatic amino color developing agent, a second of said agents being an alkaline agent, and a third of said agents being a solid water-soluble alkali-cleavable precursor of a sparingly-soluble alcohol that is cleaved by the alkaline environment of said color developing solution, whereby said sparingly-soluble alcohol is formed when said plurality of processing agents are admixed together and dissolved in said aqueous medium.
Claim 3
Independent Claim
218 words
A method of preparing a working strength aqueous alkaline photographic color developing solution that functions to generate image dyes in a photographic element by the coupling reaction of an oxidized color developing agent with a photographic coupler and that contains a sparingly-soluble alcohol which serves to enhance coupling efficiency, said method comprising admixing together and dissolving in an aqueous medium a plurality of photographic processing agents, one of said agents being a primary aromatic amino color developing agent, a second of said agents being an alkaline agent, and a third of said agents being a solid water-soluble alkali-cleavable precursor of a sparingly-soluble alcohol that is cleaved by the alkaline environment of said color developing solution, whereby said sparingly-soluble alcohol is formed when said plurality of processing agents are admixed together and dissolved in said aqueous medium, said precursor being selected from the group consisting of carbonates of the formula: ##STR6## wherein n is an integer of from 1 to 3, R is hydrogen or an alkyl group of 1 to 4 carbon atoms, and M is ammonium or an alkali metal, and sulfites of the formula: ##STR7## wherein n is an integer of from 1 to 3, R is hydrogen or an alkyl group of 1 to 4 carbon atoms, and M is ammonium or an alkali metal.
Claim 4
Independent Claim
218 words
A method of preparing a working strength aqueous alkaline photographic color developing solution that functions to generate image dyes in a photographic element by the coupling reaction of an oxidized color developing agent with a photographic coupler and that contains a sparingly-soluble alcohol which serves to enhance coupling efficiency, said method comprising admixing together and dissolving in an aqueous medium a plurality of photographic processing agents, one of said agents being a primary aromatic amino color developing agent, a second of said agents being an alkaline agent, and a third of said agents being a solid water-soluble alkali-cleavable precursor of a sparingly-soluble alcohol that is cleaved by the alkaline environment of said color developing solution, whereby said sparingly-soluble alcohol is formed when said plurality of processing agents are admixed together and dissolved in said aqueous medium, said precursor being selected from the group consisting of carbonates of the formula: ##STR6## wherein n is an integer of from 1 to 3, R is hydrogen or an alkyl group of 1 to 4 carbon atoms, and M is ammonium or an alkali metal, and sulfites of the formula: ##STR7## wherein n is an integer of from 1 to 3, R is hydrogen or an alkyl group of 1 to 4 carbon atoms, and M is ammonium or an alkali metal.
Claim 5
Dependent Claim
48 words
A method as claimed in claim 2 wherein said precursor is a carbonate of the formula: ##STR8## wherein n is an integer of from 1 to 3, R is hydrogen or an alkyl group of 1 to 4 carbon atoms, and M is ammonium or an alkali metal.
Claim 6
Dependent Claim
17 words
A method as claimed in claim 2 wherein said precursor is an alkali metal or ammonium monobenzylcarbonate.
Claim 7
Dependent Claim
13 words
A method as claimed in claim 2 wherein said precursor is potassium monobenzylcarbonate.
Claim 8
Dependent Claim
48 words
A method as claimed in claim 2 wherein said precursor is a sulfite of the formula: ##STR9## wherein n is an integer of from 1 to 3, R is hydrogen or an alkyl group of 1 to 4 carbon atoms, and M is ammonium or an alkali metal.
Claim 9
Dependent Claim
17 words
A method as claimed in claim 2 wherein said precursor is an alkali metal or ammonium monobenzylsulfite.
Claim 10
Dependent Claim
13 words
A method as claimed in claim 2 wherein said precursor is sodium monobenzylsulfite.
Claim 11
Independent Claim
50 words
A method of incorporating a sparingly-soluble alcohol in a working strength aqueous alkaline photographic color developing solution, which method comprises dissolving in said solution a solid water-soluble alkali-cleavable precursor of a sparingly-soluble alcohol that is cleaved by the alkaline environment of said color developing solution to yield said sparingly-soluble alcohol.
Claim 12
Independent Claim
50 words
A method of incorporating a sparingly-soluble alcohol in a working strength aqueous alkaline photographic color developing solution, which method comprises dissolving in said solution a solid water-soluble alkali-cleavable precursor of a sparingly-soluble alcohol that is cleaved by the alkaline environment of said color developing solution to yield said sparingly-soluble alcohol.
Claim 13
Dependent Claim
103 words
A photographic processing concentrate in the form of a finely-divided solid that is useful in the preparation of a working strength aqueous alkaline photographic color developing solution that functions to generate image dyes in a photographic element by the coupling reaction of an oxidized color developing agent with a photographic coupler and that contains a sparingly-soluble alcohol which serves to enhance coupling efficiency, said concentrate comprising a primary aromatic amino color developing agent, an alkaline agent, and a solid water-soluble alkali-cleavable precursor of a sparingly-soluble alcohol that is cleaved by the alkaline environment of said color developing solution to yield said sparingly-soluble alcohol.
Claim 14
Dependent Claim
103 words
A photographic processing concentrate in the form of a finely-divided solid that is useful in the preparation of a working strength aqueous alkaline photographic color developing solution that functions to generate image dyes in a photographic element by the coupling reaction of an oxidized color developing agent with a photographic coupler and that contains a sparingly-soluble alcohol which serves to enhance coupling efficiency, said concentrate comprising a primary aromatic amino color developing agent, an alkaline agent, and a solid water-soluble alkali-cleavable precursor of a sparingly-soluble alcohol that is cleaved by the alkaline environment of said color developing solution to yield said sparingly-soluble alcohol.
Claim 15
Dependent Claim
120 words
A photographic processing kit for use in the preparation of a working strength aqueous alkaline photographic color developing solution that functions to generate image dyes in a photographic element by the coupling reaction of an oxidized color developing agent with a photographic coupler and that contains a sparingly-soluble alcohol which serves to enhance coupling efficiency, said kit comprising a plurality of parts, at least one of said parts comprising a primary aromatic amino color developing agent, at least one of said parts comprising an alkaline agent, and at least one of said parts comprising a solid water-soluble alkali-cleavable precursor of a sparingly-soluble alcohol that is cleaved by the alkaline environment of said color developing solution to yield said sparingly-soluble alcohol.
Claim 16
Dependent Claim
120 words
A photographic processing kit for use in the preparation of a working strength aqueous alkaline photographic color developing solution that functions to generate image dyes in a photographic element by the coupling reaction of an oxidized color developing agent with a photographic coupler and that contains a sparingly-soluble alcohol which serves to enhance coupling efficiency, said kit comprising a plurality of parts, at least one of said parts comprising a primary aromatic amino color developing agent, at least one of said parts comprising an alkaline agent, and at least one of said parts comprising a solid water-soluble alkali-cleavable precursor of a sparingly-soluble alcohol that is cleaved by the alkaline environment of said color developing solution to yield said sparingly-soluble alcohol.
Claim 17
Dependent Claim
151 words
An all-solid photographic processing kit for use in the preparation of a working strength aqueous alkaline photographic color developing solution that functions to generate image dyes in a photographic element by the coupling reaction of an oxidized color developing agent with a photographic coupler and that contains a sparingly-soluble alcohol which serves to enhance coupling efficiency, said kit comprising a plurality of parts which are mixed together and dissolved in an aqueous medium to form said working strength color developing solution, each of said parts being in the form of a finely-divided solid, at least one of said parts comprising a primary aromatic amino color developing agent, at least one of said parts comprising an alkaline agent, and at least one of said parts comprising a solid water-soluble alkali-cleavable precursor of a sparingly-soluble alcohol that is cleaved by the alkaline environment of said color developing solution to yield said sparingly-soluble alcohol.
Claim 18
Dependent Claim
151 words
An all-solid photographic processing kit for use in the preparation of a working strength aqueous alkaline photographic color developing solution that functions to generate image dyes in a photographic element by the coupling reaction of an oxidized color developing agent with a photographic coupler and that contains a sparingly-soluble alcohol which serves to enhance coupling efficiency, said kit comprising a plurality of parts which are mixed together and dissolved in an aqueous medium to form said working strength color developing solution, each of said parts being in the form of a finely-divided solid, at least one of said parts comprising a primary aromatic amino color developing agent, at least one of said parts comprising an alkaline agent, and at least one of said parts comprising a solid water-soluble alkali-cleavable precursor of a sparingly-soluble alcohol that is cleaved by the alkaline environment of said color developing solution to yield said sparingly-soluble alcohol.
Claim 19
Dependent Claim
233 words
An all-solid photographic processing kit for use in the preparation of a working strength aqueous alkaline photographic color developing solution that functions to generate image dyes in a photographic element by the coupling reaction of an oxidized color developing agent with a photographic coupler and that contains a sparingly-soluble alcohol which serves to enhance coupling efficiency, said kit comprising a plurality of parts which are mixed together and dissolved in an aqueous medium to form said working strength color developing solution, each of said parts being in the form of a finely-divided solid, at least one of said parts comprising a primary aromatic amino color developing agent, at least one of said parts comprising an alkaline agent, and at least one of said parts comprising a solid water-soluble alkali-cleavable precursor of a sparingly-soluble alcohol that is cleaved by the alkaline environment of said color developing solution to yield said sparingly-soluble alcohol, said precursor being selected from the group consisting of carbonates of the formula: ##STR10## wherein n is an integer of from 1 to 3, R is hydrogen or an alkyl group of 1 to 4 carbon atoms, and M is ammonium or an alkali metal, and sulfites of the formula: ##STR11## wherein n is an integer of from 1 to 3, R is hydrogen or an alkyl group of 1 to 4 carbon atoms, and M is ammonium or an alkali metal.
Claim 20
Dependent Claim
233 words
An all-solid photographic processing kit for use in the preparation of a working strength aqueous alkaline photographic color developing solution that functions to generate image dyes in a photographic element by the coupling reaction of an oxidized color developing agent with a photographic coupler and that contains a sparingly-soluble alcohol which serves to enhance coupling efficiency, said kit comprising a plurality of parts which are mixed together and dissolved in an aqueous medium to form said working strength color developing solution, each of said parts being in the form of a finely-divided solid, at least one of said parts comprising a primary aromatic amino color developing agent, at least one of said parts comprising an alkaline agent, and at least one of said parts comprising a solid water-soluble alkali-cleavable precursor of a sparingly-soluble alcohol that is cleaved by the alkaline environment of said color developing solution to yield said sparingly-soluble alcohol, said precursor being selected from the group consisting of carbonates of the formula: ##STR10## wherein n is an integer of from 1 to 3, R is hydrogen or an alkyl group of 1 to 4 carbon atoms, and M is ammonium or an alkali metal, and sulfites of the formula: ##STR11## wherein n is an integer of from 1 to 3, R is hydrogen or an alkyl group of 1 to 4 carbon atoms, and M is ammonium or an alkali metal.
Claim 21
Dependent Claim
49 words
A processing kit as claimed in claim 13 wherein said precursor is a carbonate of the formula: ##STR12## wherein n is an integer of from 1 to 3, R is hydrogen or an alkyl group of 1 to 4 carbon atoms, and M is ammonium or an alkali metal.
Claim 22
Dependent Claim
18 words
A processing kit as claimed in claim 13 wherein said precursor is an alkali metal or ammonium monobenzylcarbonate.
Claim 23
Dependent Claim
14 words
A processing kit as claimed in claim 13 wherein said precursor is potassium monobenzylcarbonate.
Claim 24
Dependent Claim
49 words
A processing kit as claimed in claim 13 wherein said precursor is a sulfite of the formula: ##STR13## wherein n is an integer of from 1 to 3, R is hydrogen or an alkyl group of 1 to 4 carbon atoms, and M is ammonium or an alkali metal.
Claim 25
Dependent Claim
18 words
A processing kit as claimed in claim 13 wherein said precursor is an alkali metal or ammonium monobenzylsulfite.
Claim 26
Dependent Claim
14 words
A processing kit as claimed in claim 13 wherein said precursor is sodium monobenzylsulfite.
Claim 27
Independent Claim
132 words
A method of incorporating a sparingly-soluble alcohol in a working strength aqueous alkaline photographic color developing solution, which method comprises dissolving in said solution a solid water-soluble alkali-cleavable precursor of a sparingly-soluble alcohol that is cleaved by the alkaline environment of said color developing solution to yield said sparingly-soluble alcohol, said precursor being selected from the group consisting of carbonates of the formula: ##STR14## wherein n is an integer of from 1 to 3, R is hydrogen or an alkyl group of 1 to 4 carbon atoms, and M is ammonium or an alkali metal, and sulfites of the formula: ##STR15## wherein n is an integer of from 1 to 3, R is hydrogen or an alkyl group of 1 to 4 carbon atoms, and M is ammonium or an alkali metal.
Claim 28
Independent Claim
132 words
A method of incorporating a sparingly-soluble alcohol in a working strength aqueous alkaline photographic color developing solution, which method comprises dissolving in said solution a solid water-soluble alkali-cleavable precursor of a sparingly-soluble alcohol that is cleaved by the alkaline environment of said color developing solution to yield said sparingly-soluble alcohol, said precursor being selected from the group consisting of carbonates of the formula: ##STR14## wherein n is an integer of from 1 to 3, R is hydrogen or an alkyl group of 1 to 4 carbon atoms, and M is ammonium or an alkali metal, and sulfites of the formula: ##STR15## wherein n is an integer of from 1 to 3, R is hydrogen or an alkyl group of 1 to 4 carbon atoms, and M is ammonium or an alkali metal.
Claim 29
Dependent Claim
185 words
A photographic processing concentrate in the form of a finely-divided solid that is useful in the preparation of a working strength aqueous alkaline photographic color developing solution that functions to generate image dyes in a photographic element by the coupling reaction of an oxidized color developing agent with a photographic coupler and that contains a sparingly-soluble alcohol which serves to enhance coupling efficiency, said concentrate comprising a primary aromatic amino color developing agent, an alkaline agent, and a solid water-soluble alkali-cleavable precursor of a sparingly-soluble alcohol that is cleaved by the alkaline environment of said color developing solution to yield said sparingly-soluble alcohol, said precursor being selected from the group consisting of carbonates of the formula: ##STR16## wherein n is an integer of from 1 to 3, R is hydrogen or an alkyl group of 1 to 4 carbon atoms, and M is ammonium or an alkali metal, and sulfites of the formula: ##STR17## wherein n is an integer of from 1 to 3, R is hydrogen or an alkyl group of 1 to 4 carbon atoms, and M is ammonium or an alkali metal.
Claim 30
Dependent Claim
185 words
A photographic processing concentrate in the form of a finely-divided solid that is useful in the preparation of a working strength aqueous alkaline photographic color developing solution that functions to generate image dyes in a photographic element by the coupling reaction of an oxidized color developing agent with a photographic coupler and that contains a sparingly-soluble alcohol which serves to enhance coupling efficiency, said concentrate comprising a primary aromatic amino color developing agent, an alkaline agent, and a solid water-soluble alkali-cleavable precursor of a sparingly-soluble alcohol that is cleaved by the alkaline environment of said color developing solution to yield said sparingly-soluble alcohol, said precursor being selected from the group consisting of carbonates of the formula: ##STR16## wherein n is an integer of from 1 to 3, R is hydrogen or an alkyl group of 1 to 4 carbon atoms, and M is ammonium or an alkali metal, and sulfites of the formula: ##STR17## wherein n is an integer of from 1 to 3, R is hydrogen or an alkyl group of 1 to 4 carbon atoms, and M is ammonium or an alkali metal.
Claim 31
Dependent Claim
202 words
A photographic processing kit for use in the preparation of a working strength aqueous alkaline photographic color developing solution that functions to generate image dyes in a photographic element by the coupling reaction of an oxidized color developing agent with a photographic coupler and that contains a sparingly-soluble alcohol which serves to enhance coupling efficiency, said kit comprising a plurality of parts, at least one of said parts comprising a primary aromatic amino color developing agent, at least one of said parts comprising an alkaline agent, and at least one of said parts comprising a solid water-soluble alkali-cleavable precursor of a sparingly-soluble alcohol that is cleaved by the alkaline environment of said color developing solution to yield said sparingly-soluble alcohol, said precursor being selected from the group consisting of carbonates of the formula: ##STR18## wherein n is an integer of from 1 to 3, R is hydrogen or an alkyl group of 1 to 4 carbon atoms, and M is ammonium or an alkali metal, and sulfites of the formula: ##STR19## wherein n is an integer of from 1 to 3, R is hydrogen or an alkyl group of 1 to 4 carbon atoms, and M is ammonium or an alkali metal.
Claim 32
Dependent Claim
202 words
A photographic processing kit for use in the preparation of a working strength aqueous alkaline photographic color developing solution that functions to generate image dyes in a photographic element by the coupling reaction of an oxidized color developing agent with a photographic coupler and that contains a sparingly-soluble alcohol which serves to enhance coupling efficiency, said kit comprising a plurality of parts, at least one of said parts comprising a primary aromatic amino color developing agent, at least one of said parts comprising an alkaline agent, and at least one of said parts comprising a solid water-soluble alkali-cleavable precursor of a sparingly-soluble alcohol that is cleaved by the alkaline environment of said color developing solution to yield said sparingly-soluble alcohol, said precursor being selected from the group consisting of carbonates of the formula: ##STR18## wherein n is an integer of from 1 to 3, R is hydrogen or an alkyl group of 1 to 4 carbon atoms, and M is ammonium or an alkali metal, and sulfites of the formula: ##STR19## wherein n is an integer of from 1 to 3, R is hydrogen or an alkyl group of 1 to 4 carbon atoms, and M is ammonium or an alkali metal.
Claim 33
Dependent Claim
192 words
An all-solid photographic processing kit for use in the preparation of a working strength aqueous alkaline photographic color developing solution that functions to generate image dyes in a photographic element by the coupling reaction of an oxidized color developing agent with a photographic coupler and that contains a sparingly-soluble alcohol which serves to enhance coupling efficiency, said kit comprising a plurality of parts which are mixed together and dissolved in an aqueous medium to form said working strength color developing solution, each of said parts being in the form of a finely-divided solid, at lea st one of said parts comprising a primary aromatic amino color developing agent, at least one of said parts comprising an alkaline agent, and at least one of said parts comprising a solid water-soluble alkali-cleavable precursor of a sparingly-soluble alcohol that is cleaved by the alkaline environment of said color developing solution to yield said sparingly-soluble alcohol, said precursor having the formula: ##STR20## wherein R is a hydrocarbyl radical, n is an integer of from 1 to 8, X is selected from the group consisting of carbon and sulfur, and M is ammonium or an alkali metal.
Claim 34
Dependent Claim
192 words
An all-solid photographic processing kit for use in the preparation of a working strength aqueous alkaline photographic color developing solution that functions to generate image dyes in a photographic element by the coupling reaction of an oxidized color developing agent with a photographic coupler and that contains a sparingly-soluble alcohol which serves to enhance coupling efficiency, said kit comprising a plurality of parts which are mixed together and dissolved in an aqueous medium to form said working strength color developing solution, each of said parts being in the form of a finely-divided solid, at lea st one of said parts comprising a primary aromatic amino color developing agent, at least one of said parts comprising an alkaline agent, and at least one of said parts comprising a solid water-soluble alkali-cleavable precursor of a sparingly-soluble alcohol that is cleaved by the alkaline environment of said color developing solution to yield said sparingly-soluble alcohol, said precursor having the formula: ##STR20## wherein R is a hydrocarbyl radical, n is an integer of from 1 to 8, X is selected from the group consisting of carbon and sulfur, and M is ammonium or an alkali metal.
Claim 35
Independent Claim
176 words
A method of preparing a working strength aqueous alkaline photographic color developing solution that functions to generate image dyes in a photographic element by the coupling reaction of an oxidized color developing agent with a photographic coupler and that contains a sparingly-soluble alcohol which serves to enhance coupling efficiency, said method comprising admixing together and dissolving in an aqueous medium a plurality of photographic processing agents, one of said agents being a primary aromatic amino color developing agent, a second of said agents being an alkaline agent, and a third of said agents being a solid water-soluble alkali-cleavable precursor of a sparingly-soluble alcohol that is cleaved by the alkaline environment of said color developing solution, whereby said sparingly-soluble alcohol is formed when said plurality of processing agents are admixed together and dissolved in said aqueous medium; said precursor having the formula: ##STR21## wherein R is a hydroxycarbyl radical, n is an integer of from 1 to 8, X is selected from the group consisting of carbon and sulfur, and M is ammonium or an alkali metal.
Claim 36
Independent Claim
176 words
A method of preparing a working strength aqueous alkaline photographic color developing solution that functions to generate image dyes in a photographic element by the coupling reaction of an oxidized color developing agent with a photographic coupler and that contains a sparingly-soluble alcohol which serves to enhance coupling efficiency, said method comprising admixing together and dissolving in an aqueous medium a plurality of photographic processing agents, one of said agents being a primary aromatic amino color developing agent, a second of said agents being an alkaline agent, and a third of said agents being a solid water-soluble alkali-cleavable precursor of a sparingly-soluble alcohol that is cleaved by the alkaline environment of said color developing solution, whereby said sparingly-soluble alcohol is formed when said plurality of processing agents are admixed together and dissolved in said aqueous medium; said precursor having the formula: ##STR21## wherein R is a hydroxycarbyl radical, n is an integer of from 1 to 8, X is selected from the group consisting of carbon and sulfur, and M is ammonium or an alkali metal.
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