Color-shifted dyes with thermally unstable carbamate moiety comprising
申请人:Polaroid Corporation
公开号:US04826976A1
公开(公告)日:1989-05-02
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.
Heat-sensitive element for use in a thermal imaging method
申请人:POLAROID CORPORATION
公开号:EP0174054A2
公开(公告)日:1986-03-12
A heat sensitive element is provided which is intended for use in a thermal imaging method for forming color images which relies upon the irreversible unimolecular fragmentation of one or more thermally unstable carbamate moieties of an organic compound to effect a visually discernible color shift from colorless to colored, from colored to colorless or from one color to another.