COATING COMPOSITIONS AND THEIR USE IN THE RESTORATIVE AND/OR PROTECTIVE TREATMENT OF PHOTOGRAPHIC ELEMENTS

摘要

Polymerizable coating compositions by radiation and especially useful for recovery processing and / or protection of photographic elements are comprised of a polymerizable epoxy compound, a cationic initiator to start the polymerization of the epoxy compound, an acrylic compound polymerizable, an aromatic ketone haloalkylée which serves as a free radical initiator to start the polymerization of the acrylic compound, and a polymerizable organofunctional silane. Photographic elements, such as photographic films, motion picture films, paper prints and micro-sheets, are provided with a protective coating layer which is permanently bonded to the element by coating the element with the composition polymerizable by radiation and irradiating the coating to bind the element and polymerize to form a crosslinked polymer layer transparent, flexible, scratch resistant. The protective coating layer may be applied either on the face of the element bearing the image is on the support side of the element or on both sides. The radiation polymerizable composition can also be used as a restorative composition in the processing of photographic elements having scratches and defects such as marks caused by abrasion which detract from the appearance or the projection skills of the element. When the radiation curable composition is used as a composition for food, it can be applied locally in the region of such defects, so as to effectively remove and restore the item to restore it to a substantially perfect condition, or it may be applied over the entire surface of the element at the same time to eliminate the defects and to form a protective coating layer which provides protection against scratches and a subsequent abrasion.