Eastman-kodak Company

Gerald M Leszyk

Edward D Morrison

Charles Chester Anderson

Paul Albert Christian

Dennis J Eichorst

Louis P Harasta

Carl Peter Novak

David F Jennings

David A Niemeyer

Kenneth L Tingler

Robert Franklin Williams, Jr

The present invention describes an imaging element which includes a support, an image-forming layer, a transparent magnetic recording layer, and an electrically-conductive layer. The electrically-conductive layer is a dispersion in a film-forming binder of acicular, crystalline single phase, semi-conductive metal-containing particles having a cross-sectional diameter less than 0.02 .mu.m and an aspect ratio of greater than or equal to 5:1.

Imaging element comprising an electrically conductive layer containing

The present invention describes imaging elements which include a support, an image-forming layer and an electrically-conductive layer. The electrically conductive layer is a dispersion in a film-forming binder of acicular, crystalline single phase, conductive metal-containing particles having a cross-sectional diameter less than 0.02 .mu.m and an aspect ratio of greater than or equal to 5:1.

Imaging elements comprising an electrically conductive layer containing

An electroconductive imaging element, that is especially useful in a high speed laser printing process utilizing electrostatography, is comprised of an insulating support, an electrically-conductive layer overlying the support and a thermoplastic dielectric imaging layer overlying the electrically-conductive layer. The electrically-conductive layer, which is comprised of at least 3 milligrams per square meter of a colloidal gel of vanadium pentoxide dispersed in a polymeric binder combines a high degree of transparency with a high degree of electrical conductivity. The thermoplastic dielectric imaging layer has a thickness of at least 0.2 micrometers and a surface resistivity of at least 10.sup.13 ohms/square and is comprised of a thermoplastic polymer with a glass transition temperature of at least 20.degree. C.

Imaging element for use in electrostatography

Imaging elements comprising a support, at least one imaging layer and an antistat layer, said antistat layer comprising vanadium pentoxide in a binder, said binder being a polyesteranionomer and coating compositions for forming such antistat layers.

Imaging element

Curable coating compositions useful for protective treatment of elements bearing electrographically-formed toner images are comprised of (a) either (i) a mixture of a siloxy-containing polycarbinol and an acrylated urethane, or (ii) a siloxy-containing acrylated urethane; (b) a multifunctional acrylate; and, optionally (c) a free radical photoinitiator. Toner image-bearing elements, such as electrographic elements and specifically photoconductive recording films, can be provided with a protective overcoat layer which is bonded to the element and which serves to protect the toner image from abrasion and scratches. Such an overcoat layer is provided by coating the element with a curable composition and curing the resulting coating. The protective overcoat layer is applied to the toner image-bearing side of the element.

Radiation-curable overcoat compositions and toner-imaged elements

Radiation-curable compositions useful for restorative and/or protective treatment of photographic elements are comprised of a polymerizable epoxy compound, a cationic initiator for initiating polymerization of the epoxy compound, a polymerizable acrylic compound, a haloalkylated aromatic ketone which serves as a free-radical initiator for initiating polymerization of the acrylic compound, and a polymerizable organofunctional silane. Photographic elements, such as still films, motion picture films, paper prints, microfiche, and the like, are provided with a protective overcoat layer which is permanently bonded to the element, and serves to protect it from abrasion and scratches, by coating the element with the radiation-curable composition and irradiating the coating to bond it to the element and cure it to form a transparent, flexible, scratch-resistant, cross-linked polymeric layer. The protective overcoat layer can be applied to the image-bearing side of the element or to the support side of the element or to both sides. The radiation-curable composition can also be used as a restorative composition in the treatment of photographic elements which have scratches, abrasion marks, and the like, which impair the appearance or projection capabilities of the element. In use as a restorative composition, the radiation-curable composition can be applied locally in the region of the defects only, to effectively eliminate them and restore the element to a substantially defect-free condition, or it can be applied over the entire surface of the element to both eliminate the defects and form a protective overcoat layer that is capable of providing protection against subsequent scratching or abrasion.

Radiation-curable compositions for restorative and/or protective

Radiation-curable compositions useful for restorative and/or protective treatment of photographic elements are comprised of an acrylated urethane, an aliphatic ethylenically-unsaturated carboxylic acid, a multifunctional acrylate, and a siloxy-containing polycarbinol. Photographic elements, such as still films, motion picture films, paper prints, microfiche, and the like, are provided with a protective overcoat layer which is permanently bonded to the element, and serves to protect it from abrasion and scratches, by coating the element with the radiation-curable composition and irradiating the coating to bond it to the element and cure it to form a transparent, flexible, scratch-resistant, cross-linked polymeric layer. The protective overcoat layer can be applied to the image-bearing side of the element or to the support side of the element or to both sides. The radiation-curable composition can also be used as a restorative composition in the treatment of photographic elements which have scratches, abrasion marks, and the like, which impair the appearance or projection capabilities of the element. In use as a restorative composition, the radiation-curable composition can be applied locally in the region of the defects only, to effectively eliminate them and restore the element to a substantially defect-free condition, or it can be applied over the entire surface of the element to both eliminate the defects and form a protective overcoat layer that is capable of providing protection against subsequent scratching or abrasion.

Radiation-curable composition for restorative and/or protective

Photographic elements, such as still films, motion picture films, paper prints, microfiche, and the like, which have defects such as scratches, abrasion marks and the like, which impair the appearance or projection capabilities of the element are treated with a restorative composition which fills in the defects so as to effectively eliminate them and restore the element to a substantially defect-free condition. The restorative composition which is applied to the photographic element is a radiation-curable composition comprising an acrylated urethane, an aliphatic ethylenically-unsaturated carboxylic acid and a multifunctional acrylate. It is applied to the element, at least in the region of the defect being treated, and, is then subjected to radiation, such as, for example, ultraviolet light irradiation or high energy electron bombardment, sufficient to bond it to the element and cure it to a transparent, flexible, scratch-resistant, cross-linked polymeric material.

Method of treating scratched or abraded photographic elements with

Photographic elements, such as still films, motion picture films, paper prints, microfiche, and the like, are provided with a protective overcoat layer which is permanently bonded to the element and serves to protect it from abrasion and scratches. The protective overcoat is formed by coating the element with a radiation-curable composition, comprising an acrylated urethane, an aliphatic ethylenically-unsaturated carboxylic acid and a multifunctional acrylate, and irradiating the coating to bond it to the element and cure it to form a transparent, flexible, scratch-resistant, cross-linked polymeric layer. Protective overcoat layers can be applied to the image-bearing side of the element or to the support side of the element or to both sides.

Photographic elements coated with protective overcoats

Thin plastic parts which can have precise tolerances and can be of complex shape are prepared by casting a viscous radiation-curable composition onto a support, such as a moving web of polymeric material, in the shape of the desired part and then irradiating, for example with ultraviolet radiation or high energy electrons, to cause curing of the composition to a solid plastic. The radiation-curable composition is formulated with viscosity and flow characteristics which enable it to be cast in the exact shape of the part desired yet retain this shape during curing while supported only by the surface on which it has been cast. Plastic parts made by this method can be formed entirely of the radiation-curable composition by casting onto a web having a release surface from which the part can be stripped subsequent to curing or can be formed partially from a web material and partially from the radiation-curable composition by casting onto a web to which the composition will bond and subsequently cutting the web into discrete portions which include the cured composition.

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Spencerport, NY, United States of America

Gerald M Leszyk