Photothermographic materials incorporating arylboronic acids
AssigneeCarestream Health, Inc.
InventorsKui Chen-Ho, Kumars Sakizadeh
Life of this patent
Estimating the term…
Abstract
Incorporation of certain arylboronic acid compounds into photothermographic materials provides materials with reduced initial image Dmin and improved hot-dark Dmin print stability without unacceptable loss in sensitometric properties.
Claims20
A black-and-white, organic solvent based photothermographic material comprising a support and having on at least one side thereof a photothermographic layer and comprising, in reactive association:
- a. a photosensitive silver halide
- b. a non-photosensitive source of reducible silver ions,
- c. a reducing agent for said reducible silver ions,
- d. a hydrophobic polymeric binder, and
- e. one or more arylboronic acid compounds represented by Structure (I)
- wherein Ar represents an aromatic carbocyclic or heterocyclic group, and wherein any non-hydrogen substituent that is attached to a ring atom of Ar that is adjacent to the Ar ring atom attached to the boron atom is a bond to a fused aromatic or non-aromatic carbocyclic or heterocyclic ring,
- and wherein said arylboronic acid compound is present in an amount of at least 0.5 g/m2.
A black-and-white, organic solvent based photothermographic material comprising a support and having on at least one side thereof a photothermographic layer and comprising, in reactive association:
- a. a photosensitive silver halide,
- b. a non-photosensitive source of reducible silver ions, comprising at least silver behenate,
- c. one or more reducing agents for said reducible silver ions,
- d. a polyvinyl butyral or polyvinyl acetal binder, and
- d. one or more arylboronic acid compounds represented by Structure (II)
- wherein R1 R2, and R3 each independently represents hydrogen, an alkyl group, a cycloalkyl group, an aryl group, a nitro group, halo group, a trihalomethyl group, a hydroxy group, an alkoxy group, an aryloxy group, an alkylthio group, an acetyl group, a nitrile group, or R1 and R2, or R1 and R3, or R1, R2, and R3 can be joined together to form one or more fused carbocyclic, heterocyclic, aromatic, or heteroaromatic rings, and
- wherein said arylboronic acid compound is present in an amount of from 0.5 g/m2 to about 5 g/m2.
Dependencies are inferred from the claim text.