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1. 发明专利

JPH09241238A BISPYRROLE COMPOUND AND OPTICAL RECORDING MEDIUM CONTAINING THE SAME 失效
公开(公告)号：JPH09241238A
公开(公告)日：1997-09-16
申请号：JP5141896
申请日：1996-03-08
申请人： MITSUI TOATSU CHEMICALS
发明人： NISHIMOTO TAIZO , MISAWA TSUTAYOSHI , SUGIMOTO KENICHI , TSUDA TAKESHI , UMEHARA HIDEKI , TAKUMA HIROSUKE
IPC分类号： B41M5/26 , C07C33/26 , C07C211/65 , C07C245/04 , C07C255/30 , C07C309/29 , C07C321/08 , C07C321/20 , C07C321/26 , C07C323/07 , C07C323/09 , C07C323/20 , C07C323/21 , C07C323/22 , C07C323/29 , C07C323/34 , C07C323/60 , C07C323/62 , C07C327/36 , C07C329/12 , C07C333/16 , C07D207/44 , C07D207/456 , G11B7/24 , G11B7/244
摘要： PROBLEM TO BE SOLVED: To obtain a pyrrole compound having good recording characteristics and useful for optical recording media excellent in light resistance. SOLUTION: This bispyrrole compound is expressed by formula I (R1 is H, an alkyl; R2 -R6 are each H, an alkyl, an alkoxy, an alkylcarbonyl, a halogen, etc.; X is an anion). The compound of formula I is obtained by condensing a pyrrole compound of formula II with a 1,3-cyclohexanedione of formula III in the presence of an inorganic acid catalyst (e.g. HBF4 ) and then substituting the anion of the inorganic acid by one of other various anions. The addition of the bispyrrole compound of formula I to recording layers gives optical recording media enabling the recording and regeneration of information or the regeneration of information with light having a wavelength selected from among 620-690nm and further enabling the recording and regeneration of information or the regeneration of information on the basis of the CD standard with light having a wavelength selected from among 770-830nm.

2. 发明专利

JPH0958130A OPTICAL RECORDING MEDIUM 失效
公开(公告)号：JPH0958130A
公开(公告)日：1997-03-04
申请号：JP14465996
申请日：1996-06-06
申请人： MITSUI TOATSU CHEMICALS
发明人： TAKUMA HIROSUKE , MISAWA TSUTAYOSHI , SUGIMOTO KENICHI , NISHIMOTO TAIZO , TSUDA TAKESHI , UMEHARA HIDEKI
IPC分类号： B41M5/26 , C09B25/00 , G11B7/24 , G11B7/244
摘要： PROBLEM TO BE SOLVED: To obtain an optical recording medium having interchangeability to multi-wavelength laser, in an optical recording medium wherein a recording layer, a reflecting layer and a protective layer are provided on a substrate, by adding a quinophthalone compd. having the absorption max. within a specific wavelength range to the recording layer. SOLUTION: In an optical recording medium wherein a recording layer, a reflecting layer and a protective layer are provided on a substrate, a quinophthalone compd. represented by formula (wherein R1 -R8 are a hydrogen atom, a halogen atom, a nitro group or an alkyl group and X is a hydrogen atom, a halogen atom, an alkoxy group or an aryloxy group) and having the absorption max. within a wavelength range of 400-500nm is added to the recording layer. By using the quinophthalone compd. or a mixture of this compd. and a compd. having proper light absorption in the recording layer, the optical recording medium capable of being recorded and reproduced by laser with a wavelength of 480-600nm and capable of being reproduced or recorded and reproduced by laser of 600-830nm can be obtained.

3. 发明专利

JPH08235637A OPTICAL RECORDING MEDIUM 失效
公开(公告)号：JPH08235637A
公开(公告)日：1996-09-13
申请号：JP30272895
申请日：1995-11-21
申请人： MITSUI TOATSU CHEMICALS
发明人： UMEHARA HIDEKI , YANAGIMACHI MASATOSHI , TANIGUCHI YOSHITERU , HIROSE SUMIO
IPC分类号： B41M5/26 , G11B7/24 , G11B7/244
摘要： PURPOSE: To obtain an optical recording medium which can be recorded and/or reproduced by a red laser with a prescribed wavelength and satisfies CD standards by laminating a recording layer and an optical interference layer composed mainly of an organic pigment and having a prescribed refractive index and a prescribed extinction coefficient. CONSTITUTION: A recording layer 2' and an optical interference layer 3' on a substrate 1' are layers which are composed of an organic pigment. The recording layer 2' has optical constants as a refractive index of 1.8 or higher in a laser beam at a wavelength λ1, that of 1.0 or higher in a laser beam at a wavelength λ2, an extinction coefficient of 0.04 to 0.20 at the wavelength λ1 and that of 0.04 to 0.6 at the wavelength λ2. In addition, the optical interference layer 3' has optical constants as a refractive index of 1.5 or higher at the wavelength λ1, that of 1.7 or higher at the wavelength λ2, an extinction coefficient of 0.02 to 0.15 at the wavelength λ2 and that of 0.04 to 0.25 at the wavelength λ2. In addition, the wavelength λ1 of the laser beam is selected from a range of 770 to 830nm, and the wavelength λ2 is selected from a range of 620 to 690nm.

4. 发明专利

JPH07323665A OPTICAL RECORDING MEDIUM 失效
公开(公告)号：JPH07323665A
公开(公告)日：1995-12-12
申请号：JP7363695
申请日：1995-03-30
申请人： MITSUI TOATSU CHEMICALS
发明人： UMEHARA HIDEKI , YANAGIMACHI MASATOSHI , AIHARA SHIN , TANIGUCHI YOSHITERU , HIROSE SUMIO
IPC分类号： B41M5/26 , G11B7/24 , G11B7/244
摘要： PURPOSE:To obtain an optical recording medium capable of corresponding to the recording and reproduction due to near IR laser and red laser by forming a recording layer so that the absorbancy of light with a specific wavelength shows a specific value. CONSTITUTION:In an optical recording medium obtained by successively laminating a recording layer containing a dye, a reflecting layer and a protective layer on a substrate, the recording layer has absorption max. at below 630nm and is formed from a substance wherein the absorbancy of light (lambda1) with a wavelength of 630--690nm is 0.03-0.5 and the absorbancy of light (lambda2) with a wavelength of 770-830nm is 0.03-0.3. Or, the recording layer has absorption max. at below 630nm and 680-900nm. By this constitution, the optical recording medium capable of being reproduced by red laser with a wavelength of 630-690nm and capable of being recorded and reproduced by near IR laser with a wavelength of 770-830nm is obtained. Further, the optical recording medium is formed so that the reflectivity to the light of lambda1 measured through the substrate is 15% or more and the reflectivity to the light of lambda2 is 65% or more.

5. 发明专利

JPH07166082A PHTHALOCYANINE COMPOUND AND OPTICAL RECORDING MEDIUM CONTAINING THE SAME 失效
公开(公告)号：JPH07166082A
公开(公告)日：1995-06-27
申请号：JP31784293
申请日：1993-12-17
申请人： MITSUI TOATSU CHEMICALS , YAMAMOTO CHEMICALS INC
发明人： UMEHARA HIDEKI , SUGIMOTO KENICHI , NISHIMOTO TAIZO , MISAWA TSUTAYOSHI , ITO NAOTO
IPC分类号： B41M5/26 , C09B47/10 , C09B47/18 , G03C1/735 , G03C1/76 , G11B7/24 , G11B7/244
摘要： PURPOSE:To obtain a colorant for use in optical recording media which retains high sensitivity even in high-speed or high-density recording to attain satisfactory recording properties and which is excellent in long-term stability and light resistance by obtaining a specific phthalocyanine compound. CONSTITUTION:One to four phthalonitrile compounds represented by formula I (where R and R' each is a 1-15C saturated hydrocarbon group or a 2-15C unsaturated hydrocarbon group) are mixed with one to four phthalonitrile compounds represented by formula II (wherein R and R' are as defined above and X is a halogen). This mixture is reacted with a Pd compound with heating either in an alcohol in the presence of, e.g. 1, 8-diazabicyclo[5, 4, 0]undecene (DBU) or in a high-boiling solvent such as chloronaphthalene. Thus, this compound is obtained, which is represented by formula III (wherein R to R each is a 1-15C (un)substituted saturated hydrocarbon group or a 2-15C (un)substituted unsaturated hydrocarbon group and X to X each is a halogen or H). One or two layers of one to three compounds comprising this compound are formed on a transparent substrate by coating or vapor deposition to obtain this medium.

6. 发明专利

JPH03174704A FERROMAGNETIC METAL PARTICLE AND MANUFACTURE THEREOF 失效
公开(公告)号：JPH03174704A
公开(公告)日：1991-07-29
申请号：JP19777990
申请日：1990-07-27
申请人： MITSUI TOATSU CHEMICALS
发明人： TAGAWA KIMITERU , TAKAHASHI SEIICHI , UTSUNO NORITOSHI , UMEHARA HIDEKI , HAYASHI FUJIO , KOBA SHIGEO , SUDA SATORU
IPC分类号： C01G49/02 , B22F1/00 , B22F9/22 , C09D5/23 , C09D7/12 , G11B5/706 , G11B5/84 , H01F1/09
摘要： PURPOSE:To improve oxidation stability and to maintain high saturated magnetization against deterioration of an environment by simultaneously neutralizing cobalt and iron in slurry in which iron-base oxyhydroxide particles are dispersed, and immediately forming gel generated directly as spinel compound as particle surface film. CONSTITUTION:The bivalent ions of cobalt and the trivalent ferric ions are simultaneously neutralized in slurry in which iron-base oxyhydroxide particles are dispersed, and gel generated directly as spinel compound is formed as film on the surfaces of the particles. Further, after ferromagnetic metal particles are formed to be obtained by heating, reducing, they are smoothly oxidized to stop the igniting property to form ferrite film having spinel structure on the surfaces of the particles. Thus, excellent oxidation stability is obtained, and even if an environment is deteriorated, highly saturated magnetization can be maintained.

7. 发明专利

JPH09212915A OPTICAL RECORDING MEDIUM 失效
公开(公告)号：JPH09212915A
公开(公告)日：1997-08-15
申请号：JP1964896
申请日：1996-02-06
申请人： MITSUI TOATSU CHEMICALS
发明人： MIYASHITA TAKEHIRO , UMEHARA HIDEKI , FUKUDA SHIN , FUKUDA NOBUHIRO
IPC分类号： G11B7/254 , G11B7/24 , G11B7/257 , G11B7/258
摘要： PROBLEM TO BE SOLVED: To obtain an optical recording medium whose durability is excellent, whose reliability is high and which can be manufactured at low costs by a method wherein a light-reflecting layer is constituted of a thin metal layer and of a silver reflective layer. SOLUTION: An optical recording medium is constituted in such a way that a light-absorbing layer which contains an organic pigment, a thin metal layer, a silver reflective layer and a protective layer are laminated sequentially on a transparent substrate. Alternatively, an optical recording medium is constituted in such a way that a light-absorbing layer which contains an organic pigment, a thin metal layer, a silver reflective layer, a metal layer and a protective layer are laminated sequentially on a transparent substrate. It is desirable that, in the optical recording medium, the thin metal layer is a metal layer whose film thickness is at 0.1 to 5nm and which is composed of Ti, V, Cr, Cu, Zn or W.

8. 发明专利

JPH09204690A OPTICAL RECORDING MEDIUM 失效
公开(公告)号：JPH09204690A
公开(公告)日：1997-08-05
申请号：JP1466796
申请日：1996-01-30
申请人： MITSUI TOATSU CHEMICALS
发明人： FUKUDA SHIN , YAMAZAKI FUMIHARU , OKAMURA TOMOYUKI , UMEHARA HIDEKI , FUKUDA NOBUHIRO
IPC分类号： G11B7/24 , G11B7/258 , G11B7/26
摘要： PROBLEM TO BE SOLVED: To manufacture a highly reliable optical recording medium having excellent light resistance at a low cost by a method wherein a metal layer whose main component is silver is employed as a light reflective layer. SOLUTION: A optical recording medium is composed of a transparent substrate 10 and a light absorbing layer 20 containing at least organic dyestuff an amorphous transparent oxide layer 30, a light reflective layer 40 and a protective layer 50 which are formed on the transparent substrarte 10. In the optical recording medium, the transparent oxide layer 30 consists of an oxide layer whose main components are amorphous indium oxide and tin oxide and the light reflective layer 40 consists of a metal layer whose main component is silver. With this constitution, a recordable optical recording medium which shows a high reflectivity over a wide wavelength range and, further, has the excellent light resistance and moisture-resistant characteristics can be manufactured.

9. 发明专利

JPH09138977A OPTICAL RECORDING MEDIUM 失效
公开(公告)号：JPH09138977A
公开(公告)日：1997-05-27
申请号：JP29859695
申请日：1995-11-16
申请人： MITSUI TOATSU CHEMICALS
发明人： YANAGIMACHI MASATOSHI , HIROSE SUMIO , TANIGUCHI YOSHITERU , UMEHARA HIDEKI
IPC分类号： G11B7/24
摘要： PROBLEM TO BE SOLVED: To improve the C/N of the ATIP signals in a ROM region and to lower the jitter of prepit parts by forming wobbling tracks consisting of pregrooves in a RAM region to an approximately sinusoidal curve. SOLUTION: This optical recording medium is formed with a dyestuff layer 2 on the front surface of a substrate 1 consisting of plastic, is formed with a reflection layer 3 consisting of a metal on this dyestuff layer 2 and is further formed with a protective layer 4 on this reflection layer 3. Prepits 6 and pregrooves 5 are formed on the substrate 1. The wobbling amplitude of the pregrooves in the ROM region and RAM region of this optical recording medium is preferably in a range of >=25 to

10. 发明专利

JPH09120586A OPTICAL RECORDING MEDIUM 失效
公开(公告)号：JPH09120586A
公开(公告)日：1997-05-06
申请号：JP19048796
申请日：1996-07-19
申请人： MITSUI TOATSU CHEMICALS
发明人： YANAGIMACHI MASATOSHI , HIROSE SUMIO , TANIGUCHI YOSHITERU , UMEHARA HIDEKI
IPC分类号： G11B7/24 , G11B7/00 , G11B7/004 , G11B7/007 , G11B7/013 , G11B7/248 , G11B7/30
摘要： PROBLEM TO BE SOLVED: To provide a hybrid disk having good signal characteristics satisfying Orange Book standards. SOLUTION: This optical recording medium is formed to >=250 to =30 to =3100 in the product of the depth of the pregrooves between the pits and the amplitude of wobbling tracks and >=130 to >=250nm in the depth dg of the pregrooves of a recordable region.

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