申请人:Eastman Kodak Company
公开号:US03970454A1
公开(公告)日:1976-07-20
A new class of photographic developing agents of the p-aminophenol type are compounds of the formula: ##EQU1## wherein R.sup.1 is an alkyl group of 1 to 12 carbon atoms; R.sup.2 is an alkyl group of 1 to 12 carbon atoms or a sulfoalkyl group of 1 to 12 carbon atoms, R.sup.3 is a hydrogen atom or an alkyl group of 1 to 12 carbon atoms, R.sup.4 is a hydrogen atom or an alkyl group of 1 to 12 carbon atoms, and X.sup.- is an anion with the proviso that when R.sup.2 is a sulfoalkyl group then X.sup.- is the sulfo radical of R.sup.2. These compounds are useful as color developing agents, especially in diffusion transfer processes, and have been found to provide advantageous characteristics as compared with conventional developers of the p-amino-phenol type, for example, a substantial decrease in the formation of unwanted color stain in the receiving layer employed in diffusion transfer processes.
一种新型的p-氨基酚类照相显影剂是以下化合物:##EQU1## 其中,R.sup.1是1到12个碳原子的烷基;R.sup.2是1到12个碳原子的烷基或1到12个碳原子的磺酰烷基,R.sup.3是氢原子或1到12个碳原子的烷基,R.sup.4是氢原子或1到12个碳原子的烷基,X.sup.-是一个阴离子,但当R.sup.2是磺酰烷基时,X.sup.-是R.sup.2的磺酸根。这些化合物可以用作彩色显影剂,特别是在扩散转移过程中,与传统的p-氨基酚类显影剂相比,具有优越的特性,例如,在扩散转移过程中,可显著减少接收层中不需要的色斑的形成。