Leuco dye-containing coating compositions
US7462443B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 5, 2003 |
| Grant date | Dec 9, 2008 |
| Priority date | — |
| Expiry date | Jan 12, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/244
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Compositions and systems for labeling substrates, such as optical disks, using leuco dye-containing coating compositions are described. The composition can comprise a color forming composition, an electromagnetic radiation absorber, and a stabilizing agent. The color forming composition can include a leuco dye, a hexaarylbiimidazole activator, and an acid-generating source. The absorber can be admixed with or in thermal contact with the color forming composition. The stabilizing agent can be configured for protecting the leuco dye upon exposure to ambient light, wherein the stabilizing agent comprises a diarylguanidine dye salt. The coating composition can be optimized for development using electromagnetic radiation having a frequency from about 760 nm and 800 nm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.