Phthalocyanine and naphthalocyanine light-absorbing compound and optical recording medium containing same
US5446142A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jun 11, 1993 |
| Grant date | Aug 29, 1995 |
| Priority date | — |
| Expiry date | Jun 11, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/248
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention provides a light-absorbing compound represented by the formula (I): EQU Dye-(OR.sup.1)(OR.sup.2)(OR.sup.3) . . . (OR.sup.n) (I) wherein Dye is a light-absorbing compound residue having at least one aromatic ring; OR.sup.1 to OR.sup.n are substituents on the aromatic ring, and are independently (a) substituted or unsubstituted saturated hydrocarbonoxy groups having 1 to 20 carbon atoms, or (b) substituted or unsubstituted unsaturated hydrocarbonoxy groups having 2 to 20 carbon atoms, and at least one of OR.sup.1 to OR.sup.n is an unsaturated hydrocarbonoxy group; and n is a value of from 1 to 10. The present invention also provides an optical recording medium containing the above-mentioned light-absorbing compound in a recording layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.