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US 7,261,999 B2Granted
Photothermographic materials containing post-processing stabilizers
AssigneeCarestream Health, Inc.
InventorsBryan V. Hunt, Kumars Sakizadeh
Life of this patent
Estimating the term…
Abstract
1,3-Diaryl-substituted urea compounds have been found to function as post-processing stabilizers in photothermographic materials. These compounds can be presented by the following Structure (I): wherein R1 and R2 are the same or different substituted or unsubstituted aryl group.
Claims20
A photothermographic material comprising a support and having on at least one side thereof a photothermographic layer comprising, in reactive association:
- a. a photosensitive silver halide
- b. a non-photosensitive source of reducible silver ions that is a silver carboxylate,
- c. a reducing agent for said reducible silver ions,
- d. a polymeric binder, and
- e. at least one 1,3-diaryl-substituted urea compound represented by the following Structure (I):
- wherein R1 and R2 are the same or different substituted or unsubstituted aryl group, and
- wherein said 1,3-diaryl-substituted urea compound is present in an amount of less than 5% by weight based on the total dry weight of said binder.
4 more elements
A black-and-white photothermographic material comprising a support and having on at least one side thereof a photothermographic layer comprising, in reactive association:
- a. a photosensitive silver halide,
- b. a non-photosensitive source of reducible silver ions, comprising at least silver behenate,
- c. a reducing agent composition comprising one or more hindered phenol, hindered bis-phenol, or mixtures thereof,
- d. a polyvinyl butyral or polyvinyl acetal binder,
- e. a polyhalogen stabilizer represented by the formula Q-(Y)n—C(Z1Z2X) wherein, Q represents an alkyl, aryl or heterocyclic group, Y represents (C═O) or SO2, n is 1, and Z1, Z2, and X each represent a bromine atom, that is present in an amount of from about 0.01 to about 0.05 mol/mol of total silver, and
- f. at least one 1,3-diaryl-substituted urea compound present in a total amount of from about 1×10−5 to about 1×10−2 moles/m2 on the same side of the support as the photothermographic layer,
- said 1,3-diaryl-urea compound represented by the following Structure (I):
- wherein R1 and R2 are the same or different substituted or unsubstituted phenyl group, and
- wherein said 1,3-diaryl-substituted urea compound is present in an amount of less than 5% by weight based on the total dry weight of said binder.
6 more elements
Dependencies are inferred from the claim text.