Thermally-transferable fluorescent diphenylpyrazolines
US4866025A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 1988 |
| Grant date | Sep 12, 1989 |
| Priority date | — |
| Expiry date | Sep 30, 2008 |
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 diphenylpyrazoline compound dispersed in a polymeric binder, and on the other side thereof a slipping layer comprising a lubricant. In a preferred embodiment, the compound has the formula: ##STR1## wherein: R is hydrogen, cyan; carboxyalkyl; a substituted or unsubstituted alkyl group of 1 to about 6 carbon atoms; or a substituted or unsubstituted aryl group of about 6 to about 10 carbon atoms; and J is hydrogen; a substituted or unsubstituted alkyl group of 1 to about 6 carbon atoms; a substituted or unsubstituted aryl group of about 6 to about 10 carbon atoms; or may represent --CH.sub.2 -- or --CH.sub.2 CH.sub.2 -- to complete a 5- or 6-membered non-aromatic carbocyclic ring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.