Amino antipyrine based azo ligands and their metal complexes for use as optical recording media
US7625621B2 · kind B2 · utility
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20References
11Claims
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Key dates
| Filing date | Jul 29, 2005 |
| Grant date | Dec 1, 2009 |
| Priority date | — |
| Expiry date | Sep 1, 2026 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B45/14
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention provides novel azo dye material based on antipyrine azo structure and metal complexes containing such azo compounds which are suitable for optical recording media. The dyes exert high light-fastnesses properties and excellent recording characteristics. In particular the invention relates to optical layers comprising such dyes, to a method for manufacturing such optical layers and to optical recording media comprising such optical layers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.