申请人:Eastman Kodak Company
公开号:US20040137380A1
公开(公告)日:2004-07-15
This invention relates to an imaging element comprising an imaging layer having associated therewith a compound of Structure I:
1
wherein PUG is a residue of removing a hydrogen from
2
wherein X, Y, and Z represent substituents selected independently from the groups hydrogen, alkyl group of 1 to 6 carbon atoms, cyclopropyl, aryl, arylalkyl, and heterocyclic groups, wherein at least one of X, Y, and Z is an aryl group and one of X, Y, Z, which may or may not be an aryl group, is attached in the direction of the backbone, and the other substituents are as defined in the specification. Such compounds have good reactivity and can by used to block photographically useful compounds such as developing agents until thermally activated under preselected conditions. Compounds according to the present invention are especially useful in color photothermographic imaging elements.
本发明涉及一种成像元素,其包括具有结构I的化合物的成像层:1其中PUG是从2中去除氢的残基,其中X、Y和Z分别表示独立选择的取代基,包括氢、1至6个碳原子的烷基、环丙基、芳基、芳基烷基和杂环基,其中X、Y和Z中至少有一个是芳基,而X、Y、Z中的一个(可能是芳基,也可能不是芳基)朝向骨架方向连接,其他取代基如规范中所定义。这些化合物具有良好的反应性,并可用于阻断具有摄影用途的化合物(例如显影剂),直到在预选条件下热激活。本发明的化合物在彩色光热成像元素中特别有用。