Document Type and Number:
Japanese Patent JPS5324114
Kind Code:
B2
Abstract:
Films prepared from emulsions containing a novel graft copolymer, made from the reaction between one or more ethylenically unsaturated monomers and a hydrolyzed and modified gelatin, exhibit a remarkable resistance to becoming desensitized, a defect which occurs when the film is handled or "kinked". The gelatin used herein may be first hydrolyzed with acid or base followed by reaction of the product therefrom with a dibasic acid anhydride prior to further reaction with the ethylenically unsaturated monomer to form the graft copolymer. In some instances, prior to formation of the graft copolymer, the product above may be further reacted with an aldehyde, such as allyl aldehyde or 2,4-dihydroxybenzaldehyde. These novel graft copolymers are added to the silver halide emulsion at any point during the preparation of the emulsion and are particularly useful in X-ray products.
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Application Number:
JP3226674A
Publication Date:
July 19, 1978
Filing Date:
March 23, 1974
Export Citation:
International Classes:
G03C1/04; C08F289/00; G03C1/047