Azo dyes and use thereof as image dyes in photographic silver dye bleach materials
申请人:ILFORD AG
公开号:EP0373797A1
公开(公告)日:1990-06-20
Azo dyes of the formula
where X is alkyl or alkoxy each of 1 to 4 carbon atoms or halogen, X′ is hydrogen, alkyl or alkoxy each of 1 to 4 carbon atoms or halogen, Y and Y′ are independently of each other hydrogen or halogen, Z is hydrogen, alkyl or alkoxy or alkylthio each of 1 to 4 carbon atoms, or halogen, M is a 1-, 2- or 3-valent metal cation, ammonium or an organic ammonium compound, m is 1, 2 or 3 and n is 2 to 10, are suitable for use as image dyes in photographic silver dye bleach materials.
式中的偶氮染料
式中 X 为 1 至 4 个碳原子的烷基或烷氧基或卤素,X′为氢、1 至 4 个碳原子的烷基或烷氧基或卤素,Y 和 Y′各自独立地为氢或卤素,Z 为氢、M 是 1、2 或 3 价金属阳离子、铵或有机铵化合物,m 是 1、2 或 3,n 是 2 至 10。