Thermally-transferable fluorescent europium complexes
US5006503A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 13, 1990 |
| Grant date | Apr 9, 1991 |
| Priority date | — |
| Expiry date | Mar 13, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31786
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A donor element for thermal transfer comprising a support having on one side thereof a fluorescent europium complex dispersed in a polymeric binder. In a preferred embodiment, the complex has the formula: ##STR1## wherein: D is a substituted or unsubstituted, aromatic, 5- or 6-membered carbocyclic or heterocyclic moiety; and PA1 J is --CF.sub.3, --CH.sub.3, --CH.sub.2 F or --CHF.sub.2. In another preferred embodiment, the europium atom may also have attached thereto at least one monodentate ligand with an electron-donating oxygen or nitrogen atom or at least one bidentate ligand with two electron-donating oxygen, nitrogen or sulfur atoms atoms capable of forming a 5- or 6-membered ring with the europium atom.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.