Methine dyes and optical recording medium containing same

US5093492A · kind A · utility

Assignee

• BASF SE

Inventors

• Michael Acker · Ludwigshafen am Rhein, DE
• Mathias Dust · Ludwigshafen, DE
• Peter Neumann · Wiesloch, DE
• Sibylle Brosius · Ludwigshafen, DE
• Klaus D. Schomann · Stockach, DE
• Harald Kuppelmaier · Heidelberg, DE

Key dates

• Filing date: Aug 7, 1990
• Grant date: Mar 3, 1992
• Expiry date: Aug 7, 2010

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S430/165
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

Methine dyes of the formula ##STR1## where R.sup.1, R.sup.2, R.sup.3, R.sup.4, X, Y and the rings A and B each have specific meanings, and methine dyes obtainable by reacting an organic mono- or polyisocyanate with such a methine dye of the abovementioned formal where only the radicals R.sup.1 and/and R.sup.4 have a group reacting with an organic mono- or polyisocyanate are useful in optical recording media.