Nitro schiff base metal complex dyes and their use with monosubstituted squaric acid dyes
申请人:Clariant International Ltd.
公开号:EP1930378A1
公开(公告)日:2008-06-11
The present invention relates to Nitro Schiff base metal complex dyes, to compositions comprising Nitro Schiff base metal complex dyes and monosubstituted squaric acid complex dyes, and their use in optical layers for optical data recording, preferably for optical data recording using a laser with a wavelength up to 450 nm.
The invention further relates to a write once read many (WORM) type optical data recording medium capable of recording and reproducing information with radiation of blue laser, which employs Nitro Schiff base metal complex dyes, or compositions comprising Nitro Schiff base metal complex dyes and monosubstituted squaric acid complex dyes, in the optical layer.