Tetra dye mixed with another dye or dyes for optical recording e

Details Tetra dye mixed with another dye or dyes for optical recording e Tetra dye mixed with another dye or dyes for optical recording e

1996-10-16

1999-03-02

Evans, Elizabeth

Stock material or miscellaneous articles

Circular sheet or circular blank

428 642, 428 644, 428 648, 428913, 43027014, 4304951, 430945, 369283, 369288, B32B 300

Patent

active

058768211

ABSTRACT:
A dye mixture having, at 780 nm, a real refractive index not less than 1.8, and an imaginary part not greater than 0.15 and comprising (a) a tetra dye having a metallized azo dianionic dye with a cationic dye counterion and (b) at least one other dye having the structure according to formula I: ##STR1## wherein: A may be equal to or different from A.sup.1, in which each represents an aryl group having 6 to 10 carbon atoms;

REFERENCES:
patent: 5294471 (1994-03-01), Evans et al.
patent: 5426015 (1995-06-01), Chapman et al.
patent: 5500325 (1996-03-01), Chapman et al.

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