Thermally developable emulsions and imaging materials containing binder mixture
AssigneeEastman Kodak Company
InventorsKathleen M. Vaeth, Charles L. Bauer, Jon A. Hammerschmidt, David M. Teegarden
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Abstract
Aqueous-based thermally sensitive emulsions and imaging materials include a mixture of binders in at least one imaging layer. These binder mixtures include from 70 to about 99 weight % of hydrophilic binders such as gelatin and gelatin derivatives, and the remainder of the total binder weight is composed of one or more hydrophobic binders or water-dispersible polymer latexes. These binder mixtures are particularly useful in imaging layers of thermographic and photothermographic materials and provide long term keeping and reduced crystallization of fatty acids.
Claims30
An aqueous-based thermally sensitive emulsion comprising:
- a) a non-photosensitive source of reducible silver ions that includes an organic silver carboxylate formed from a fatty acid that is insoluble in gelatin,
- b) a reducing agent composition for said reducible silver ions, and
- c) a binder mixture comprising a hydrophilic binder in an amount of from about 75 to about 99 weight % of total binder weight and a hydrophobic binder or water-dispersible polymer or latex comprising the remainder of the total binder weight.
An aqueous-based thermally developable material comprising a support having thereon at least one aqueous-based imaging layer comprising a mixture of binders, and having in reactive association:
- a) a non-photosensitive source of reducible silver ions that includes an organic silver carboxylate that is formed from a fatty acid that is insoluble in gelatin, and
- b) a reducing agent composition for said reducible silver ions,
- wherein said binder mixture comprises a hydrophilic binder in an amount of from about 75 to about 99 weight % of total binder weight and a hydrophobic binder or water-dispersible polymer or latex comprising the remainder of the total binder weight.
An aqueous-based photothermographic material comprising a support having thereon at least one aqueous-based imaging layer comprising a binder mixture, and having in reactive association:
- a) a photosensitive silver halide,
- b) a non-photosensitive source of reducible silver ions that includes an organic silver salt that is formed from a fatty acid that is insoluble in gelatin, and
- c) a reducing agent composition for said reducible silver ions,
- wherein said binder mixture comprises a hydrophilic binder in an amount of from 75 to about 99 weight % of total binder weight and a hydrophobic binder water-dispersible polymer latex comprising the remainder of the total binder weight.
An aqueous-based photothermographic material comprising a transparent support having thereon an aqueous-based imaging layer comprising a binder mixture, and having in reactive association:
- a) photosensitive grains of silver bromide, silver iodobromide, or both,
- b) a non-photosensitive source of reducible silver ions that comprises one or more silver carboxylates provided as an aqueous nanoparticulate dispersion, at least one of which silver carboxylates is silver behenate,
- c) a reducing agent composition for said reducible silver ions that includes one or more bisphenols, with or without a high contrast co-developer, and
- d) one or more antifoggants, toners, or spectral sensitizing dyes,
- wherein said binder mixture comprises gelatin or a gelatin derivative in an amount of from about 90 to about 95 weight % based on total binder weight, and a hydrophobic binder or water-dispersible polymer or latex that is poly(styrene-co-butadiene), a core-shell latex of poly(styrene-co-butyl acrylate-co-2-acrylamido-2-methylpropane-1-sulfonic acid, sodium salt) as the core and poly(styrene-co-2-hydroxyethyl methacrylate-co-2-acrylamido-2-methylpropane-1-sulfonic acid, sodium salt) as the shell, a polyurethane dispersion, or a polyester dispersion comprising the remainder of the total binder weight,
- said photothermographic material further comprising an aqueous-based protective layer disposed over said imaging layer, and an aqueous-based antihalation layer disposed on the backside of said support.
An aqueous-based thermally sensitive emulsion comprising:
- a) a non-photosensitive source of reducible silver ions that includes an organic silver carboxylate formed from a fatty acid that is insoluble in gelatin,
- b) a reducing agent composition for said reducible silver ions, and
- c) a binder mixture comprising a hydrophilic binder in an amount of from about 75 to about 99 weight % of total binder weight and a water-soluble polyvinyl butyral or water-soluble cellulose ester comprising the remainder of the total binder weight.
An aqueous-based thermally developable material comprising a support having thereon at least one aqueous-based imaging layer comprising a mixture of binders, and having in reactive association:
- a) a non-photosensitive source of reducible silver ions that includes an organic silver carboxylate formed from a fatty acid that is insoluble in gelatin, and
- b) a reducing agent composition for said reducible silver ions,
- wherein said mixture of binders comprises a hydrophilic binder in an amount of from 75 to about 99 weight % of total binder weight and a water-soluble polyvinyl butyral or water-soluble cellulose ester comprising the remainder of the total binder weight.
Dependencies are inferred from the claim text.