Mixture of indoaniline dyes in dye-donor element for thermal dye transfer
US5340789A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 1993 |
| Grant date | Aug 23, 1994 |
| Priority date | — |
| Expiry date | Dec 16, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31786
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A cyan dye-donor element for thermal dye transfer imaging comprising a support having thereon a dye layer comprising a dye dispersed in a polymeric binder, wherein the dye comprises a mixture of at least three different 2-carbamoyl-4-[N-(p-aminoaryl)-imino]-1,4-naphthoquinone dyes, each of the dyes having the formula: ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 each individually represents a substituted or unsubstituted alkyl group of from 1 to about 6 carbon atoms, a substituted or unsubstituted cycloalkyl group of from about 5 to about 7 carbon atoms, a substituted or unsubstituted aryl group of from about 5 to about 10 carbon atoms or an allyl group; PA1 R.sup.2 and R.sup.3 may be combined together to form a 5- or 6-membered ring; PA1 R.sup.2 and/or R.sup.3 may be combined with one or two of X to form a 5- or 6-membered ring; PA1 R.sup.4 and X each individually represents hydrogen, a substituted or unsubstituted alkyl group of from about 1 to about 6 carbon atoms, halogen, --NHCOR.sup.1 or --NHSO.sub.2 R.sup.1 ; and PA1 n represents an integer from 1 to 4; with the proviso that at least one of the dyes is characterized by having R.sup.1 represent an unbranched alkyl group of f…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.