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.
一类新型的p-氨基酚类光学显影剂是以下化合物:##EQU1## 其中R1是1至12个碳原子的烷基;R2是1至12个碳原子的烷基或1至12个碳原子的磺酸烷基;R3是氢原子或1至12个碳原子的烷基;R4是氢原子或1至12个碳原子的烷基;X-是阴离子,但当R2是磺酸烷基时,X-是R2的磺基。这些化合物可用作彩色显影剂,特别是在扩散转移过程中,并且与传统的p-氨基酚类显影剂相比,已发现具有优越的特性,例如,在扩散转移过程中使用的接收层中,不希望形成的颜色污渍显著减少。