Dye mixtures for optical recording layers
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United States of America Patent
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Mar 19, 1996
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N/A
app pub date -
Jan 23, 1995
filing date -
Oct 21, 1993
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Abstract
A dye mixture is disclosed. The mixture is useful in recording layers of optical recording elements. The mixture has: a) a real index of refraction of at least 1.8 in the 780 to 790 nm region of the spectra; b) an imaginary index (k) between 0.3 and 0.02 in the 780 to 790 nm region of the spectra; c) a metallized azo dye comprising an azo group linking a substituted 3-hydroxy-pyridine nucleus to a phenyl nucleus wherein the phenyl nucleus has an alkoxy or thioether substituent at its 2-position; and d) at least a second dye.
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