Infrared-absorbing cyanine colorants for laser-colorant transfer
US5972838A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 24, 1998 |
| Grant date | Oct 26, 1999 |
| Priority date | — |
| Expiry date | Jun 24, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/165
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A colorant-donor element for thermal colorant transfer comprising a support having thereon a colorant layer comprising a colorant dispersed in a binder, the colorant layer having associated therewith an infrared-absorbing cyanine colorant having a sulfonic acid group, the cyanine colorant having the following formula: ##STR1## wherein: each W independently represents the atoms necessary to form an optional 6-membered aromatic ring; PA2 each X independently represents sulfur or C(CH.sub.3).sub.2 ; PA2 each Y independently represents an alkylene group having from about 2 to about 5 carbon atoms; and PA2 Z is chlorine or an alkylsulfonyl group having from 1 to about 4 carbon atoms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.