A substantially light-insensitive monosheet thermographic recording material comprising a support and on one side of said support a thermosensitive element, wherein said thermographic recording material contains at least one compound represented by formula (I):
wherein M is hydrogen, an alkali atom or an ammonium group; R
1
is an alkyl, alkenyl-, alkynyl-, thioalkyl-, thioalkenyl- or thioalkynyl-group in which the alkyl-, alkenyl- or alkynyl-group has 6 to 25 carbon atoms; X is —O—, —S— or —N(R
2
)—; and R
2
is hydrogen, a —(CH
2
)
m
SO
3
M group or a
group; and m is an integer between 1 and 5.
一种实质上对光不敏感的单层热敏记录材料,包括一支撑体和位于所述支撑体一侧的热敏元件,其中所述热敏记录材料包含至少一种由式(I)代表的化合物:
其中 M 是氢、碱原子或
铵基团; R
1
是烷基、烯基、炔基、
硫代烷基、
硫代烯基或
硫代炔基,其中烷基、烯基或炔基具有 6 至 25 个碳原子; X 是-O-、-S-或-N(R
2
)-;以及 R
2
是氢、-(CH
2
)
m
SO
3
M 组或一个
基团;m 为 1 至 5 之间的整数。