申请人:Eastman Kodak Company
公开号:US04471046A1
公开(公告)日:1984-09-11
Photographic elements, film units, processes and alkaline processing compositions are described wherein certain 4-hydroxyalkyl-substituted 3-pyrazolidinones are employed as electron transfer agents in black-and-white and color image transfer materials. The silver halide electron transfer agents or precursors thereof have the following formula: ##STR1## wherein: n is 0, 1 or 2; R represents hydrogen or a hydrolyzable moiety; R.sup.1 and R.sup.2 each independently represents hydrogen, an alkyl or substituted alkyl group of 1 to about 6 carbon atoms, an aryl or substituted aryl group of 6 to about 10 carbon atoms, or an aralkyl group of 6 to about 10 carbon atoms, with the proviso that when n is 0, then either R.sup.1 or R.sup.2, but not both, may be hydrogen; and R.sup.3 represents at least one alkyl or alkoxy group having from 1 to about 6 carbon atoms, methylenedioxy group or ethylenedioxy group.
本文描述了摄影元素、胶片单元、过程和碱性处理组合物,其中某些4-羟基烷基取代的3-吡唑烷酮被用作黑白和彩色图像转移材料中的电子转移剂。银卤化物电子转移剂或其前体具有以下式子:##STR1## 其中:n为0、1或2;R代表氢或可水解的基团;R.sup.1和R.sup.2各自独立地代表1至约6个碳原子的烷基或取代烷基、6至约10个碳原子的芳基或取代芳基、6至约10个碳原子的芳基烷基,但当n为0时,R.sup.1或R.sup.2中的一个可以是氢,但不是两个都是氢;R.sup.3代表至少一个具有1至约6个碳原子的烷基或烷氧基、甲二氧基基团或乙二氧基基团。