Receiver for thermally-transferable fluorescent europium complexes
US5011816A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 13, 1990 |
| Grant date | Apr 30, 1991 |
| Priority date | — |
| Expiry date | Mar 13, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/142
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A receiving element for thermal transfer comprising a support having thereon a polymeric image-receiving layer which also contains a monodentate or bidentate ligand capable of reacting with a 6-coordinate europium(III) complex, transferred from a donor element, to form a higher coordinate complex in situ. In a preferred embodiment, the higher coordinate complex which is formed has the formula: ##STR1## wherein: D is a substituted or unsubstituted, aromatic, 5- or 6-membered carbocyclic or heterocyclic moiety; PA1 J is --CF.sub.3, --CH.sub.3, --CH.sub.2 F or --CHF.sub.2 ; and PA1 B represents 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 capable of forming a 5- or 6-membered ring with the europium atom.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.