Mitsubishi Chemical Corporation

Mitsubishi Kasei Corporation

Satoru Imamura

Takako Tsukahara

Shuichi Maeda

Takumi Nagao

Tameichi Ochiai

Yutaka Kurose

Kazuo Mitsuhashi

Tetsuo Murayama

Masako Takeuchi

Hisashi Shoda

Rieko Hata

Optical recording medium

An azo metal chelate compound of an azo compound of the formula (I) with a metal: ##STR1## wherein A is a residue forming a heterocyclic ring together with the carbon atom and the nitrogen atom to which it is bonded, X is a residue forming an aromatic group together with the two carbon atoms to which it is bonded, R.sup.1 is an alkyl group which may be substituted, an aryl group which may be substituted, an alkenyl group which may be substituted, or a cycloalkyl group which may be substituted, Y is a hydrogen atom or a cation, and n is an integer of from 1 to 3.

Azo metal chelate compound

Metal chelate compound and optical recording medium using the compound

An optical recording medium comprising a substrate and a recording layer formed thereon for information to be written in and/or to be read out, wherein said dye-incorporated composition comprising a cyanine type dye and an azo metal chelate compound comprising an azo type compound of the following formula (I) ##STR1## (wherein A is a residue forming a hetoro ring together with the carbon atom and the nitrogen atom to which it is bonded, B is a residue forming an aromatic ring or a hetoro ring together with the two carbon atoms to which it is bonded, and X is a group having an active hydrogen), and a metal.

Optical recording medium comprising a dye-incorporated composition

Dye-incorporated composition

Disazo metal chelate compounds for optical recording media

Growing community of inventors

Machida, Japan

Satoru Imamura