Patent EP0364166A2 successfully refreshed from Google Patents.
EP0364166A2
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Photographic element and process adapted to provide high contrast development
Assignee: Eastman Kodak Co
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Filing: 1989-10-05
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Granted: —
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Expires: 2009-10-05
Abstract
Abstract Silver halide photographic elements which are capable of high contrast development, when processed in the presence of a hydrazine compound that functions as a nucleating agent, include at least one layer comprising an amino compound which (1) comprises at least one secondary or tertiary amino group, (2) contains within its structure a group comprised of at least three repeating ethyleneoxy units, and (3) has an n-octanol/water partition coefficient (log P) of at least one. The amino compounds function as incorporated boosters and such elements are particularly useful in the field of graphic arts.
Inventors
- 👤 Harold I. C/O Eastman Kodak Company Machonkin
- 👤 Donald L. C/O Eastman Kodak Company Kerr
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 06:18
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/043; G03C1/06; G03C1/061; Y; Y10; Y10S; Y10S430/00; Y10S430/15
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
99 words
A silver halide photographic element adapted to form a high contrast image when development is carried out, in the presence of a hydrazine compound, with an aqueous alkaline developing solution, characterized in that said element includes at least one layer comprising an amino compound which (1) comprises at least one secondary or tertiary amino group, (2) contains within its structure a group comprised of at least three repeating ethyleneoxy units, and (3) has an n-octanol/water partition coefficient (log P) of at least one, log P being defined by the formula: wherein X is the concentration of the amino compound.
Claim 2
Dependent Claim
99 words
A silver halide photographic element adapted to form a high contrast image when development is carried out, in the presence of a hydrazine compound, with an aqueous alkaline developing solution, characterized in that said element includes at least one layer comprising an amino compound which (1) comprises at least one secondary or tertiary amino group, (2) contains within its structure a group comprised of at least three repeating ethyleneoxy units, and (3) has an n-octanol/water partition coefficient (log P) of at least one, log P being defined by the formula: wherein X is the concentration of the amino compound.
Claim 3
Dependent Claim
30 words
A photographic element as claimed in claim 1 characterized in that said group comprised of at least three repeating ethyleneoxy units is directly linked to a tertiary amino nitrogen atom.
Claim 4
Dependent Claim
35 words
A photographic element as claimed in claim 1 characterized in that said group comprised of at least three repeating ethyleneoxy units is a linking group joining tertiary amino nitrogen atoms of a bis-tertiary amino compound.
Claim 5
Dependent Claim
24 words
A photographic element as claimed in any of claims 1 to 3 characterized in that said amino compound comprises at least 20 carbon atoms.
Claim 6
Dependent Claim
77 words
A photographic element as claimed in claim 1 characterized in that said amino compound is a bis-tertiary amine of the formula: wherein n is an integer with a value of 3 to 50, R i , R 2 , R 3 and R 4 are independently alkyl groups of 1 to 8 carbon atoms, R 1 and R 2 taken together and R 3 and R4. taken together represent the atoms necessary to complete a heterocyclic ring.
Claim 7
Dependent Claim
53 words
A photographic element as claimed in claim 1 characterized in that said amino compound is a bis-secondary amine of the formula: wherein n is an integer with a value of 3 to 50 and each R is independently a linear or branched, substituted or unsubstituted alkyl group of at least 4 carbon atoms.
Claim 8
Dependent Claim
38 words
A photographic element as claimed in any of claims 1 to 6 characterized in that said amino compound is present in said element in an amount of from about 1 to about 25 millimoles per mole of silver.
Claim 9
Dependent Claim
79 words
A process for forming a high contrast photographic image which comprises developing a photographic element, in the presence of a hydrazine compound, with an aqueous alkaline photographic developing solution; characterized in that said element includes at least one layer containing an amino compound which (1) comprises at least one secondary or tertiary amino group, (2) contains within its structure a group comprises of at least three repeating ethyleneoxy units, and (3) has a partition coefficient of at least one.
Claim 10
Dependent Claim
79 words
A process for forming a high contrast photographic image which comprises developing a photographic element, in the presence of a hydrazine compound, with an aqueous alkaline photographic developing solution; characterized in that said element includes at least one layer containing an amino compound which (1) comprises at least one secondary or tertiary amino group, (2) contains within its structure a group comprises of at least three repeating ethyleneoxy units, and (3) has a partition coefficient of at least one.
Claim 11
Dependent Claim
29 words
A process as claimed in claim 8 characterized in that said group comprised of at least three repeating ethyleneoxy units is directly linked to a tertiary amino nitrogen atom.
Claim 12
Dependent Claim
34 words
A process as claimed in claim 8 characterized in that said group comprised of at least three repeating ethyleneoxy units is a linking group joining tertiary amino nitrogen atoms of a bis-tertiary amino compound.
Claim 13
Dependent Claim
23 words
A process as claimed in any of claims 8 to 10 characterized in that said amino compound comprises at least 20 carbon atoms.
Claim 14
Dependent Claim
75 words
A process as claimed in claim 8 characterized in that said amino compound is a bis-tertiary amine of the formula: wherein n is an integer with a value of 3 to 50, Ri , R 2 , R 3 and R 4 are independently alkyl groups of 1 to 8 carbon atoms, R, and R 2 taken together and R 3 and R 4 taken together represent the atoms necessary to complete a heterocyclic ring.
Claim 15
Dependent Claim
52 words
A process as claimed in claim 8 characterized in that said amino compound is a bis-secondary amine of the formula: wherein n is an integer with a value of 3 to 50 and each R is, independently, a linear or branched, substituted or unsubstituted alkyl group of at least 4 carbon atoms.
Claim 16
Dependent Claim
37 words
A process as claimed in any of claims 8 to 13 characterized in that said amino compound is present in said element in an amount of from about 1 to about 25 millimoles per mole of silver.
Claim 17
Dependent Claim
30 words
A process as claimed in any of claims 8 to 14 characterized in that said developing solution has a pH in the range of from about 9 to about 12.3.
Claim 18
Dependent Claim
24 words
A process as claimed in any of claims 8 to 15 characterized in that said developing solution comprises hydroquinone and a 3-pyrazolidone developing agent.
References Cited (Backward Citations)
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