N-alkyl-or n-aryl-aminopyrazolone merocyanine dye-donor element used in thermal dye transfer
US4743582A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 8, 1987 |
| Grant date | May 10, 1988 |
| Priority date | — |
| Expiry date | Jun 8, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31786
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A dye-donor element for thermal dye transfer comprises a support having thereon a 3-(N-alkyl- or N-aryl-amino)-2-pyrazolin-5-one merocyanine dye dispersed in a polymeric binder, the merocyanine dye being capable of transfer by diffusion to a dye-receiving element upon the application of heat and being incapable of substantial photolysis, the merocyanine dye being substituted or unsubstituted on the bridging methine carbon atoms. In a preferred embodiment, the merocyanine dye has the formula: ##STR1## wherein: R represents a substituted or unsubstituted alkyl group of from 1 to about 6 carbon atoms or a substituted or unsubstituted aryl group of from about 6 to about 10 carbon atoms; PA1 R.sup.1 and R.sup.2 each independently represents hydrogen, with the proviso that only one of R.sup.1 and R.sup.2 may be hydrogen at the same time; a substituted or unsubstituted alkyl group of from 1 to about 6 carbon atoms or a substituted or unsubstituted aryl group of from about 6 to about 10 carbon atoms; or R.sup.1 and R.sup.2 may be combined together with the nitrogen to which they are attached to form a heterocyclic ring system; PA1 R.sup.3 is R; PA1 n represents 0 or 1; and PA1 Z represents…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.