Preparation of cyanine dye for high density optical recording di

Details Preparation of cyanine dye for high density optical recording di Preparation of cyanine dye for high density optical recording di

1999-02-08

1999-09-28

Powers, Fiona T.

Bleaching and dyeing; fluid treatment and chemical modification

Dye or potential dye composition, additive, treatment,...

Mixed dyes, noncomplexed

8638, 8527, 548455, C09B 6732, C09B 6734

Patent

active

059580879

ABSTRACT:
A cyanine dye for using in high density optical disc recording medium, having the following structure: ##STR1## wherein R represents 4-methoxycarbonyl benzyl group, X.sup.- represents an acid anion, and n represents an integer of 1 or 2. This cyanine dye is suitable for use as a .lambda.=450 nm.about.650 nm visible light-absorbing organic dye useful as a high density optical disc recording medium.

REFERENCES:
patent: 5391413 (1995-02-01), Yanagisawa et al.
patent: 5731054 (1998-03-01), Chapman et al.

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