Color-shifted dyes with thermally unstable carbamate moiety comprising T-alkoxycarbonyl group
US4826976A · kind A · utility
81Cited by
10References
14Claims
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Assignee
Inventors
Key dates
| Filing date | Dec 18, 1987 |
| Grant date | May 2, 1989 |
| Priority date | — |
| Expiry date | Dec 18, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K1/126
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.