This invention relates to a color-shifted dye compounds containing at least one thermally unstable carbamate moiety which are useful in thermal imaging. These compounds may be represented by the formula [M--(X).sub.q ].sub.p D wherein M is a carbamate moiety; X is --N.dbd., --SO.sub.2 -- or --CH.sub.2 --; D taken with X and M represents the radical of a color-shifted organic dye, said carbamate moiety M comprising a tert-alkoxycarbonyl group, ##STR1## wherein R' is halomethyl or alkyl.
这项发明涉及一种含有至少一个热不稳定的
氨基甲酸酯基团的颜色转移
染料化合物,这些化合物在热成像中有用。这些化合物可以用公式[M--(X).sub.q ].sub.p D表示,其中M是
氨基甲酸酯基团;X是--N.dbd.,--SO.sub.2--或--CH.sub.2--;D与X和M一起代表颜色转移有机
染料的基团,所述的
氨基甲酸酯基团M包括一种叔烷氧羰基团,##STR1## 其中R'是卤代甲基或烷基。