申请人:POLAROID CORPORATION
公开号:EP0523470A2
公开(公告)日:1993-01-20
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.
对苯二酚与芳香族二羧酸的 N,N,N',N'-四取代二酰胺形成稳定的氢键络合物,其中的两个羧基在同一苯环上相互对位排列。这些络合物可以使对苯二酚更容易在水中分散,从而有助于将其加入到感光产品中。此外,二酰胺还可以加入到感光产品中,以减少或消除与对苯二酚有关的各种问题,包括对苯二酚在储存过程中在产品内部的迁移,以及由于感光产品的图像接收元件中存在的对苯二酚氧化而导致图像在储存过程中变色。