Mitsui Chemicals, Inc.

Yamamoto Chemicals, Inc.

Other

Kansai Paint Company, Ltd.

Hisashi Tsukahara

Tsutami Misawa

Taizo Nishimoto

Akira Ogiso

Kenichi Sugimoto

Keisuke Takuma

Tadashi Koike

Shinobu Inoue

Takeshi Tsuda

Yojiro Kumagae

Hideki Umehara

Toshihiro Masaoka

Kenichi Kato

Ryousuke Nara

Kenji Mizoue

Genji Imai

Hideo Kogure

Tsutomu Ishida

Yuji Inatomi

Koji Inoue

Keiji Ueno

Norihiko Mihara

Hiroyoshi Shiozaki

Shunsuke Murayama

An optical recording medium containing one or more compounds selected from imide compounds having a metallocene residue in a recording layer and an imide compound represented by a general formula (1): wherein a ring AR represents a substituted or unsubstituted aromatic ring residue or a residue formed by combining two or more aromatic ring residues via one or more linking groups; n represents the number of imide groups bonded to the ring AR; Arepresents any one of substituents Ato Abonded to a nitrogen atom of each imide group; and m represents an integer of from 1 to n, with the proviso that at least one substituent selected from the group consisting of Ato Ais one having at least one substituted or unsubstituted metallocene residue.

Imide compound and optical recording media made by using the same

An optical recording medium having an organic dye layer as a recording layer on a substrate, wherein at least one benzobisazole-based compound represented by a general formula (1) is contained in the recording layer: (wherein substituents X and Y each independently represent an aryl group or a heteroaryl group, rings A and B each independently represent an oxazole ring or a thiazole ring, and Qand Qeach independently represent a hydrogen atom, a halogen atom or an alkyl group, with a proviso that, aryl group(s) or heteroaryl group(s) represented by the substituents X and Y each independently may be substituted by a halogen atom, a hydroxyl group, a cyano group, an amino group or a substituted or unsubstituted alkyl, aralkyl, aryl, alkenyl, alkoxy, aralkyloxy, aryloxy, alkenyloxy, alkylthio, aralkylthio, arylthio, alkenylthio, mono-substituted amino, di-substituted amino, acyl, alkoxycarbonyl, aralkyloxycarbonyl, aryloxycarbonyl, alkenyloxycarbonyl, mono-substituted aminocarbonyl, di-substituted aminocarbonyl, acyloxy or heterocyclic ring group).

Benzobisazole compound and optical recording medium containing the compound

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 main component, characterized in that the organic dye has a first maximum value of absorption at a wavelength &#x3bb;of 400 nm or less in the absorption spectrum and has a second maximum value of absorption at a longer-wavelength side than the &#x3bb;, and a wavelength band wherein the refractive index (n) and the absorption coefficient (k) of the above organic dye satisfy n&#x2267;1.90 and 0.03&#x2266;k&#x2266;0.30.

Optical recording medium and novel azaporphyrin compounds

A recordable optical recording medium of this invention capable of good recording and reproduction with a laser at wavelengths of 300 to 500 nm and/or 500 to 700 nm comprises at least one porphycene compounds optionally chelated with a metal in its recording layer.

Optical recording medium and porphycene compound

Dipyrromethene-metal chelate compound and optical recording medium using thereof

Optical recording medium and dipyrromethene metal chelate compound for use therein

A novel optical recording medium having at least a recording layer and a reflective layer on a substrate is herein disclosed, wherein at least one dipyrromethene metal chelate compound represented by formula (1) is contained in the recording layer: ##STR1## wherein R.sub.1 and R.sub.9 are each independently an alkenyl group, an aryl group or a heteroaryl group; R.sub.2 to R.sub.8 are each independently a hydrogen atom, a halogen atom, or a substituted or unsubstituted alkyl, alkoxy, alkenyl, acyl, alkoxycarbonyl, aralkyl, aryl or heteroaryl group having 20 or less carbon atoms; and M is a transition metal.

Optical recording medium and dipyrromethene metal chelate compound for

A visible light curable resin composition containing a photocurable resin, a photoreaction initiator and a photosensitizer having the formula (1). The composition has a very high sensitivity to a general-purpose visible light laser, so that a high-speed scanning exposure is possible by the laser, and an extremely fine high resolution can be obtained. In addition, the composition can be used for coating or printing under safelight irradiating conditions and under bright circumstantial conditions without any thickening of the composition, and hence the composition can exert excellent noticeable effects in points of safe operativity, operational efficiency and the stability of products. Formula (1) is as follows: ##STR1## wherein rings X.sub.1 and X.sub.2 are each an optionally substituted pyrrole ring; Y is H, CN, optionally substituted alkyl, aralkyl, aryl, heteroaryl or alkenyl group; and Z.sub.1 and Z.sub.2 are halogen, optionally substituted alkyl, alkoxy, alkylthio, aralkyl, aralkyloxy, aryl, aryloxy, arylthio, heteroaryl, heteroaryloxy or heteroarylthio group, provided that at least one of substituents on the pyrrole rings X.sub.1 and X.sub.2, groups Z.sub.1 and Z.sub.2 is the alkoxy, aralkyloxy or aryloxy group.

Photosensitizer, visible light curable resin composition using the same,

An optical recording medium having at least a recording layer and a reflective layer on a substrates, the said recording layer contains a dipyrromethene metal chelate compound obtained from a dipyrromethene compound represented by the general formula (1) and a metal ion: ##STR1## wherein R.sup.1 to R.sup.7 are defined in the specification.

Dipyrromethene metal chelate compounds

An optical recording medium having at least a recording layer and a reflective layer on a substrate. The recording layer contains a dipyrromethene metal chelate compound obtained from a dipyrromethene compound represented by the general formula (1) and a metal ion: ##STR1## wherein R.sup.1 to R.sup.7 are defined in the specification.

Optical recording medium

Growing community of inventors

Sodegaura, Japan

Hisashi Tsukahara