申请人:MINNESOTA MINING AND MANUFACTURING COMPANY
公开号:EP0177317A1
公开(公告)日:1986-04-09
Azine redox dyes and their corresponding dyes of the formula
in which:
X is O, S, NR2,
Z completes a fused aromatic or heterocyclic ring system,
n is 0 or 1 to allow one R' ring substituent,
Q represents CR4R5 in which at least one of R4 and R5 is an electronegative group or R4 and R5 may complete a ring, or
when X is S Q may represent NR3 in which R3 is an aromatic or heterocyclic group.
The leuco dyes are useful as dye generators in pressure sensitive, thermographic or photothermographic imaging systems.
式中的叠氮氧化还原染料及其相应染料
其中
X 是 O、S、NR2、
Z 完成一个融合的芳环或杂环系统、
n 为 0 或 1,允许一个 R'环取代基、
Q 代表 CR4R5,其中 R4 和 R5 至少有一个是电负性基团,或 R4 和 R5 可组成一个环,或
当 X 为 S 时,Q 代表 NR3,其中 R3 为芳香族或杂环基团。
白基染料可用作压敏、热成像或光热成像系统中的染料发生器。