Title:
OPTICAL RECORDING MEDIUM AND NOVEL AZAPORPHYRIN COMPOUNDS
Document Type and Number:
WIPO Patent Application WO/2001/047719
Kind Code:
A1
Abstract:
An optical recording medium having a recording layer which contains at least one compound selected from the group consisting of mono-, di-, and triazaporphyrin compounds optionally in the form of a metal complex; or an optical recording medium comprising a substrate and formed thereon at least a recording layer containing an organic dye as a major ingredient, characterized in that the organic dye gives an absorption spectrum having a first absorption peak at a wavelength $m(c)1 not longer than 400 nm and a second absorption peak at a wavelength on the longer-wavelength side of $m(c)1, and that in the longer-wavelength-side descending slope in the absorption zone containing the first peak, there is a wavelength range in which the organic dye has a refractive index (n) and a coefficient of absorption (k) satisfying n $m(G) 1. 90 and 0. 03 $m(F) k $m(F) 0. 30, respectively.
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Inventors:
OGISO AKIRA (JP)
INOUE SHINOBU (JP)
NISHIMOTO TAIZO (JP)
TSUKAHARA HISASHI (JP)
MISAWA TSUTAMI (JP)
KOIKE TADASHI (JP)
MIHARA NORIHIKO (JP)
MURAYAMA SHUNSUKE (JP)
NARA RYOUSUKE (JP)
INOUE SHINOBU (JP)
NISHIMOTO TAIZO (JP)
TSUKAHARA HISASHI (JP)
MISAWA TSUTAMI (JP)
KOIKE TADASHI (JP)
MIHARA NORIHIKO (JP)
MURAYAMA SHUNSUKE (JP)
NARA RYOUSUKE (JP)
Application Number:
PCT/JP2000/009240
Publication Date:
July 05, 2001
Filing Date:
December 26, 2000
Export Citation:
Assignee:
MITSUI CHEMICALS INC (JP)
YAMAMOTO CHEMICALS INC (JP)
OGISO AKIRA (JP)
INOUE SHINOBU (JP)
NISHIMOTO TAIZO (JP)
TSUKAHARA HISASHI (JP)
MISAWA TSUTAMI (JP)
KOIKE TADASHI (JP)
MIHARA NORIHIKO (JP)
MURAYAMA SHUNSUKE (JP)
NARA RYOUSUKE (JP)
YAMAMOTO CHEMICALS INC (JP)
OGISO AKIRA (JP)
INOUE SHINOBU (JP)
NISHIMOTO TAIZO (JP)
TSUKAHARA HISASHI (JP)
MISAWA TSUTAMI (JP)
KOIKE TADASHI (JP)
MIHARA NORIHIKO (JP)
MURAYAMA SHUNSUKE (JP)
NARA RYOUSUKE (JP)
International Classes:
C07D487/22; C09B47/04; G11B7/246; G11B7/248; (IPC1-7): B41M5/26; C07D487/22; C09B47/04; G11B7/24
Domestic Patent References:
| WO1990002747A1 | 1990-03-22 | |||
| WO1991007659A1 | 1991-05-30 |
Foreign References:
| EP0428214A1 | 1991-05-22 | |||
| JPS61295076A | 1986-12-25 | |||
| JP2001080217A | 2001-03-27 | |||
| JP2001084594A | 2001-03-30 | |||
| US5391462A | 1995-02-21 | |||
| JPH09147413A | 1997-06-06 | |||
| US5786124A | 1998-07-28 |
Other References:
See also references of EP 1247655A4
Attorney, Agent or Firm:
Kaneda, Nobuyuki (16th Kowa Bldg. 9-20 Akasaka 1-chome Minato-ku, Tokyo, JP)
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