Photographic process and composition

Details Photographic process and composition Photographic process and composition

C - Chemistry, Metallurgy

07

C

C07C 233/65 (2006.01) C07C 39/08 (2006.01) C07C 39/15 (2006.01) G03C 8/08 (2006.01) G03C 8/18 (2006.01) G03C 8/36 (2006.01) G03C 8/52 (2006.01)

Patent

CA 2070450

C-7669 PHOTOGRAPHIC PROCESS AND COMPOSITION Abstract of the Disclosure Hydroquinones form stable hydrogen-bonded complexes with N,N,N',N'-tetrasubstituted diamides of aromatic dicarboxylic acids in which two carboxyl groups are arranged para to one another on the same phenyl ring. These complexes are useful in rendering the hydroquinones more water-dispersible to assist their incorporation into photographic products. Also, the diamides may be incorporated into photographic products to reduce or eliminate various problems associated with hydroquinones, including migration of hydroquinones within the product during storage and the discoloration of images on storage due to oxidation of hydroquinone present in an image-receiving element of the photographic product.

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