US4800150A
Expired / Lapsed
US
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Super-high contrast negative type photographic material
Assignee: Fujifilm Holdings Corp
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Filing: 1987-04-03
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Granted: 1989-01-24
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Expires: 2007-04-03
Abstract
Abstract A super-high contrast negative type silver halide photographic material is disclosed, comprising a support having provided thereon at least one silver halide emulsion layer, said emulsion layer or layers or other hydrophilic colloidal layer or layers containing a hydrazine derivative, wherein said material further contains an acidic polymer incorporating not less than 20 mol % of a monomer unit containing an acid group and a hydrophobic polymer incorporating not more than 20 mol % of a monomer unit containing an acid group and having a glass transition temperature of not more than 50° C. The material exhibits high contrast and high sensitivity without forming black spots even when processed with a stable developing solution.
Inventors
- 👤 Kazunobu Katoh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:28
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/053; G03C1/06; G03C1/061; Y; Y10; Y10S; Y10S430/00; Y10S430/15
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
105 words
A super-high contrast negative type silver halide photographic material comprising a support having provided thereon at least one silver halide emulsion layer, said emulsion layer or layers or other hydrophilic colloidal layer or layers containing a hydrazine derivative, wherein said photographic material further contains (a) an acidic polymer incorporating not less than 20 mol% of a monomer unit containing an acid group and a crosslinkable monomer unit containing at least two copolymerizable ethylenically unsaturated groups, (b) a hydrophobic polymer incorporating not more than 20 mol% of a monomer unit containing an acid group and having a glass transition temperature of not more than 50° C.
Claim 2
Dependent Claim
105 words
A super-high contrast negative type silver halide photographic material comprising a support having provided thereon at least one silver halide emulsion layer, said emulsion layer or layers or other hydrophilic colloidal layer or layers containing a hydrazine derivative, wherein said photographic material further contains (a) an acidic polymer incorporating not less than 20 mol% of a monomer unit containing an acid group and a crosslinkable monomer unit containing at least two copolymerizable ethylenically unsaturated groups, (b) a hydrophobic polymer incorporating not more than 20 mol% of a monomer unit containing an acid group and having a glass transition temperature of not more than 50° C.
Claim 3
Dependent Claim
38 words
A super-high contrast negative type silver halide photographic material as in claim 1, wherein said hydrazine derivative is represented by formula (I) R.sub.1 --NHNH--CHO (I) wherein R 1 represents an aliphatic group, or an aromatic or heterocyclic group.
Claim 4
Dependent Claim
20 words
A super-high contrast negative type silver halide photographic material as in claim 2, wherein R 1 represents an aryl group.
Claim 5
Dependent Claim
25 words
A super-high contrast negative type silver halide photographic material as in claim 1, wherein said hydrazine derivative is present in a silver halide emulsion layer.
Claim 6
Dependent Claim
35 words
A super-high contrast negative type silver halide photographic material as in claim 1, wherein said hydrazine derivative is present in an amount of from 1×10 -6 to 1×10 -1 mol per mol of silver halide.
Claim 7
Dependent Claim
39 words
A super-high contrast negative type silver halide photographic material as in claim 1, wherein said acidic polymer incorporating not less than 20 mol% of a monomer unit containing an acid group having a pKa value of 9 or less.
Claim 8
Dependent Claim
30 words
A super-high contrast negative type silver halide photographic material as in claim 6, wherein said acid group is a carboxyl group, a sulfoxylic acid group, or a phosphoric acid group.
Claim 9
Dependent Claim
25 words
A super-high contrast negative type silver halide photographic material as in claim 1, wherein said acidic polymer is in the form of an aqueous latex.
Claim 10
Dependent Claim
66 words
A super-high contrast negative type silver halide photographic material as in claim 1, wherein said monomer unit containing an acid group is a copolymerizable ethylenically unsaturated monomer represented by formula (II) ##STR44## wherein R 2 represents a hydrogen atom or a substituted or unsubstituted alkyl group; L represents a di- to tetravalent linking group; l represents 0 or 1; and m represents 1, 2, or 3.
Claim 11
Dependent Claim
39 words
A super-high contrast negative type silver halide photographic material as in claim 9, wherein R 2 represents a hydrogen atom, a methyl group, or a carboxymethyl group; and L represents --Q--, ##STR45## wherein Q represents a divalent linking group.
Claim 12
Dependent Claim
41 words
A super-high contrast negative type silver halide photographic material as in claim 1, wherein said acidic polymer incorporates from 20 to 90 mol% of said monomer unit containing an acid group and from 1 to 50 mol% of said crosslinkable monomer.
Claim 13
Dependent Claim
41 words
A super-high contrast negative type silver halide photographic material as in claim 1, wherein said acidic polymer incorporates from 50 to 90 mol% of said monomer unit containing an acid group and from 10 to 30 mol% of said crosslinkable monomer.
Claim 14
Dependent Claim
29 words
A super-high contrast negative type silver halide photographic material as in claim 1, wherein said acidic polymer is prepared in the presence of a persulfate as a polymerization initiator.
Claim 15
Dependent Claim
29 words
A super-high contrast negative type silver halide photographic material as in claim 1, wherein said acidic polymer is prepared at a polymerization temperature of from 90° to 98° C.
Claim 16
Dependent Claim
26 words
A super-high contrast negative type silver halide photographic material as in claim 8, wherein said aqueous polymer latex has a pH of from 3.5 to 5.0.
Claim 17
Dependent Claim
118 words
A super-high contrast negative type silver halide photographic material as in claim 1, wherein said hydrophobic polymer incorporates a monomer unit represented by formula (III) ##STR46## wherein X 1 represents a hydrogen atom, a halogen atom, a cyano group, or a substituted or unsubstituted alkyl group; and Y 1 represents a hydrogen atom, a halogen atom, a cyano group, a substituted or unsubstituted alkyl group, ##STR47## or a substituted or unsubstituted aryl group, wherein R 3 and R 4 each represents a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group; and R 5 and R 6 each represents a hydrogen atom, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group.
Claim 18
Dependent Claim
71 words
A super-high contrast negative type silver halide photographic material as in claim 16, wherein X 1 represents a substituted or unsubstituted alkyl group having from 1 to 4 carbon atoms; and Y 1 represents ##STR48## or a styrene group, wherein R 3 and R 4 each represents a substituted or unsubstituted alkyl group; and R 5 and R 6 each represents a hydrogen atom or a substituted or unsubstituted alkyl group.
Claim 19
Dependent Claim
52 words
A super-high contrast negative type silver halide photographic material as in claim 17, wherein Y 1 represents ##STR49## wherein R 3 represents a substituted or unsubstituted alkyl group having from 2 to 6 carbon atoms; and R 4 represents a substituted or unsubstituted alkyl group having from 1 to 6 carbon atoms.
Claim 20
Dependent Claim
25 words
A super-high contrast negative type silver halide photographic material as in claim 1, wherein said hydrophobic polymer is in the form of an aqueous latex.
Claim 21
Dependent Claim
31 words
A super-high contrast negative type silver halide photographic material as in claim 8, wherein said acidic polymer latex is present in an amount of from 0.05 to 2.0 g/m 2 .
Claim 22
Dependent Claim
31 words
A super-high contrast negative type silver halide photographic material as in claim 8, wherein said acidic polymer latex is present in an amount of from 0.1 to 1.0 g/m 2 .
Claim 23
Dependent Claim
31 words
A super-high contrast negative type silver halide photographic material as in claim 19, wherein said hydrophobic polymer latex is present in an amount of from 0.1 to 3.0 g/m 2 .
Claim 24
Dependent Claim
31 words
A super-high contrast negative type silver halide photographic material as in claim 19, wherein said hydrophobic polymer latex is present in an amount of from 0.2 to 1.5 g/m 2 .
References Cited (Backward Citations)
US4243739A
Cited
US4332878A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-01-24 | 1992-07-25 | 1993-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-24 | 1996-07-25 | 1997-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-24 | 2000-07-25 | 2001-01-24 | $7700.00 | Window Closed / Lapsed |