US 2006/0235210 A1 · Azo metal dyes and optical data carrier containing one such azo metal dye as a light absorbing compound in the information layer

Abstract

Optical data carrier comprising a preferably transparent substrate which may, if desired, have previously been coated with one or more reflection layers and to whose surface a light-writeable information layer, if desired one or more reflection layers and if desired a protective layer or a further substrate or a covering layer have been applied, which can be written on and read by means of blue, red or infrared light, preferably laser light, where the information layer comprises a light-absorbent compound and, if desired, a binder, characterized in that at least one azo metal dye is used as light-absorbent compound.

Claims23

Dependent claims

Metal complexes which have at least one ligand of the formula (I)

where
X1 is O, S, N—R1 or CH,
A together with X1 and N forms a five- or six-membered aromatic or pseudoaromatic heterocyclic ring which contains from 1 to 4 heteroatoms and/or may be benzo- or naphtho-fused and/or substituted by nonionic radicals,
Y1 is O, S, N—R2, COO, SO3, N—CO—R3 or N—SO2—R3,
B is a five- or six-membered carbocyclic or heterocyclic ring which may contain from 1 to 4 heteroatoms and/or may be benzo- or naphtho-fused and/or substituted by nonionic radicals,
R1 and R2 are each, independently of one another, hydrogen, C1-C6-alkyl, C6-C10-aryl or C7-C12-aralkyl,
R3 is C1-C12-alkyl, C3-C7-cycloalkyl, C2-C6-alkenyl, C7-C12-aralkyl, C6-C10-aryl, C1-C6-alkoxy or mono-C1-C6-alkylamino or bis-C1-C6-alkylamino.

4 more elements

Dependencies are inferred from the claim text.

Azo metal dyes and optical data carrier containing one such azo metal dye as a light absorbing compound in the information layer

Life of this patent

Azo metal dyes and optical data carrier containing one such azo metal dye as a light absorbing compound in the information layer

Life of this patent

Abstract

Claims23