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US 7,169,544 B2Granted
Thermally developable materials containing thermal solvents
AssigneeEastman Kodak Company
InventorsKui Chen-Ho, William D. Ramsden, Chaofeng Zou, Doreen C. Lynch, James B. Philip, Jr., Karissa L. Eckert, George J. Burgmaier
Life of this patent
Estimating the term…
Abstract
Black-and-white, dry processable thermally developable materials have increased stability after imaging with the incorporation of at least 0.0001 mol/m2 of a thermal solvent having one or more >N—C(═O)— groups. Such thermally developable materials include both thermographic and photothermographic materials.
Claims19
A black-and-white thermally developable material comprising a support and having thereon at least one thermally developable imaging layer comprising a polymer binder and said material further comprising, in reactive association:
- a. a non-photosensitive source of reducible silver ions,
- b. a reducing agent for said reducible silver ions, and
- c. at least 0.0001 mol/m2 of a thermal solvent having the following Structure I, II, III, or IV:
- wherein R1, R2, R3, and R4 are independently hydrogen or an alkyl, cycloalkyl, or alkenyl group, or R1 and R2, or R3 and R4 can be joined together to form a 3- to 6-membered ring, or again either R1 or R2 can be joined with either R3 or R4 to form a 6- to 8-membered ring with the >NC(═O)C(═O)N<group, provided that at least one of R1, R2, R3, and R4 is not a hydrogen atom,
- wherein R5 is hydrogen or an alkyl or alkenyl group, R6 and R7 are independently hydrogen or an alkyl or alkenyl group, or R6 and R7 can be joined together to form a 3- to 6-membered ring, or again either R6 or R7 can be joined with R5 to form a 6- to 12-membered ring with the >NC(═O)(L1)-group, and L1 is an alkylene group of 2 to 8 carbon atoms that is substituted with 2 to 8 hydroxy groups, and
- wherein R8, R9, R10, and R11 are independently hydrogen or an alkyl or alkenyl group, or R8 and R9, or R10 and R11 can be joined together to form a 3- to 6-membered ring, L2 is an alkylene group having 1 to 8 carbon atoms, provided that when L2 has 1 or less hydroxy groups, at least one of R8, R9, R10, and R11 is an alkyl that is substituted with at least one hydroxy group or alkenyl group, and
- wherein R12, R13, and R14 are hydroxyalkyl groups having 1 to 8 carbon atoms.
4 more elements
A black-and-white dry-processable photothermographic material comprising a support having on a frontside thereof,
- a) one or more frontside photothermographic imaging layers comprising a hydrophilic polymer binder or a water-dispersible polymer latex binder, and said material further comprising, in reactive association, on the frontside, a photosensitive silver halide, a non-photosensitive source of reducible silver ions, and a reducing agent for said non-photosensitive source reducible silver ions,
- b) said material comprising on the backside of said support, one or more backside photothermographic imaging layers and the same or different imaging composition, and
- c) optionally, an outermost protective layer disposed over said one or more photothermographic imaging layers on either or both sides of said support,
- wherein said material further comprises, on one or both sides of said support, at least 0.0001 mol/m2 of a thermal solvent represented by one of the following Structure I, II, III, or IV:
- wherein R1, R2, R3, and R4 are independently hydrogen or an alkyl, cycloalkyl, or alkenyl group, or R1 and R2, or R3 and R4 can be joined together to form a 3- to 6-membered ring, or again either R1 or R2 can be joined with either R3 or R4 to form a 6- to 8-membered ring with the >NC(═O)C(═O)N<group, provided that at least one of R1, R2, R3, and R4 is not a hydrogen atom,
- wherein R5 is hydrogen or an alkyl or alkenyl group, R6 and R7 are independently hydrogen or an alkyl or alkenyl group, or R6 and R7 can be joined together to form a 3- to 6-membered ring, or again either R6 or R7 can be joined with R5 to form a 6- to 12-membered ring with the >NC(═O)(L1) group, and L1 is an alkylene group of 2 to 8 carbon atoms that is substituted with 2 to 8 hydroxy groups, and
- wherein R8, R9, R10, and R11 are independently hydrogen or an alkyl or alkenyl group, or R8 and R9, or R10 and R11 can be joined together to form a 3- to 6-membered ring, L2 is an alkylene group having 1 to 8 carbon atoms, provided that when L2 is substituted with 1 or less hydroxy groups, at least one of R8, R9, R10, and R11 is an alkyl that is substituted with at least one hydroxy group or alkenyl group, and
- wherein R12, R13, and R14 are hydroxyalkyl groups.
5 more elements
Dependencies are inferred from the claim text.