Optical information recording medium using a phthalocyanine compound
US5863703A · kind A · utility
12Cited by
17References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 12, 1996 |
| Grant date | Jan 26, 1999 |
| Priority date | — |
| Expiry date | Feb 12, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/146
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A phthalonitrile compound of formula (I); ##STR1## and a diiminoisoindoline compound of formula (II): ##STR2## are allowed to react to produce a phthalocaynine compound of formula (III), ##STR3## which is an effective material for a near-infrared absorbing material and also as a recording material for an optical information recording medium. The methods of producing the phthalonitrile compound of formula (I) and the pthalocaynine compound of formula (III) are proposed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.