Infrared absorbing squarylium dyes for dye-donor element used in laser-induced thermal dye transfer
US4942141A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 16, 1989 |
| Grant date | Jul 17, 1990 |
| Priority date | — |
| Expiry date | Jun 16, 2009 |
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 laser-induced thermal dye transfer comprising a support having thereon a dye layer and an infrared-absorbing material which is different from the dye in the dye layer, and wherein the infrared-absorbing material is a squarylium dye. In a preferred embodiment, the squarylium dye has the following formula: ##STR1## wherein: R.sup.1, R.sup.2, R.sup.3 and R.sup.4 each independently represents hydrogen, hydroxy, halogen, cyano, alkoxy, aryloxy, acyloxy, aryloxycarbonyl, alkoxycarbonyl, sulfonyl, carbamoyl, acyl, acylamido, alkylamino, arylamino or a substituted or unsubstituted alkyl, aryl or hetaryl group; or any of said R.sup.1, R.sup.2, R.sup.3 or R.sup.4 groups may be combined with R.sup.5, R.sup.6, R.sup.7 or R.sup.8 or with each other to form a 5- to 7-membered substituted or unsubstituted carbocyclic or heterocyclic ring; PA0 R.sup.5, R.sup.6, R.sup.7 and R.sup.8 each independently represents hydrogen, a substituted or unsubstituted alkyl or cycloalkyl group having from 1 to about 6 carbon atoms or an aryl or hetaryl group having from about 5 to about 10 atoms; PA0 or R.sup.5 and R.sup.6 or R.sup.7 and R.sup.8 may be joined together to form a 5- to 7-membe…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.