Abstract:
Thermally developable materials that comprise a support have an antistatic backside layer that includes a quaternary ammonium salt. The same or different backside layer can also include another antistatic agent such as conductive metal particles or conductive polymers. These thermally developable materials include both thermographic and photothermographic materials that can be suitably imaged to provide images useful for medical diagnoses.
Abstract:
Thermally developable materials that comprise a support have at least two backside layers. One of these layers can be a protective layer comprising a film-forming polymer. The materials also includes a non-imaging backside conductive layer comprising non-acicular metal antimonate particles in a mixture of two or more polymers that includes a first polymer serving to promote adhesion of the backside conductive layer directly to the support or other layers, and a second polymer that is different than and forms a single phase mixture with the first polymer.
Abstract:
Thermally developable materials including photothermographic and thermographic materials have a buried conductive backside layer comprising one or more binder polymers in which are dispersed each of at least two types of conductive materials: (1) nanoparticles of one or more conductive metal compounds, and (2) one or more organic solvent soluble inorganic alkali metal salt antistatic compounds. These buried conductive backside coatings provide conductivity that is affected minimally by humidity.
Abstract:
Thermally developable materials including photothermographic and thermographic materials having a buried conductive backside layer comprising one or more binder polymers, and an antistatic compound that is an organic solvent soluble alkali metal salt of any of a perfluorinated aliphatic carboxylic acid having 2 or 3 carbon atoms, a perfluorinated aliphatic sulfonate, or a tetrafluoroborate, provide antistatic coatings that exhibit little dependence on humidity.
Abstract:
Nonpolymeric fluorochemicals defined as by the following Structure I are useful in thermally developable materials. The fluorochemicals are defined as follows: Rf—R—N(R1)(R2)(R3)+X− (I) wherein Rf is a straight or branched chain perfluoroalkyl group having 4 to 18 carbon atoms, R is a divalent linking group comprising at least 4 carbon atoms and a sulfide group in the chain, R1, R2, R3 are independently hydrogen or alkyl groups or any two of R1, R2, and R3 taken together can represent the carbon and nitrogen atoms necessary to provide a 5- to 7-membered heterocyclic ring with the cationic nitrogen atom, and X− is a monovalent anion.
Abstract:
1-Sulfonyl-1H-benzotriazole compounds have been found to be useful as antifoggants and print stabilizers in photothermographic elements. The photothermographic elements may be used in medical imaging films or as a photomask in a process where there is a subsequent exposure of an ultraviolet or short wavelength visible radiation-sensitive imageable medium.
Abstract:
Thermographic and photothermographic materials comprise a barrier layer to provide physical protection and to prevent migration of diffusible imaging components and by-products resulting from high temperature imaging and/or development. The barrier layer comprises a scavenger that is a metal hydroxide or ester. This barrier layer is capable of retarding diffusion of mobile chemicals such as organic carboxylic acids, developers, and toners.
Abstract:
Antistatic compositions include a fluorochemical that is a reaction product of Rf—CH2CH2—SO3H with an amine wherein Rf comprises 4 or more fully fluorinated carbon atoms. These antistatic compositions can be formulated in organic solvent-based conductive coating compositions, with or without hydrophobic binders, that can be used to form conductive layers in thermally developable materials including thermographic and photothermographic materials.
Abstract:
A pre-adhesive composition is described comprising an acid-functional (meth)acrylate copolymer and an aziridine crosslinking agent, which when crosslinked provides a pressure-sensitive adhesive and pressure-sensitive adhesive articles.
Abstract:
Use of a combination of a trisphenol reducing agent (developer) and a substituted olefinic co-developer in photothermographic materials reduces their sensitivity to high humidity and improves processing latitude.