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公开(公告)号：JPS564677A
公开(公告)日：1981-01-19
申请号：JP7908679
申请日：1979-06-25
Applicant: MITSUI TOATSU CHEMICALS
Inventor： NISHIZAWA ISAO , MORINAKA RIYOUICHI , TSUKAHARA RIYOUICHI , HIDAKA TSUNEO
Abstract: PURPOSE:To provide titled compsn. which is colored red by the application of electric voltage consisting of a specified anthraquinone compd. and a nematic liquid crystal. CONSTITUTION:(B) 0.1-3% of an anthraquinone cpd. of the formula (wherein R is 2-15C straight or branched chain alkyl) [obtd. by reacting 1-amino-4-hydroxy- 2-phenoxy(or-2-methoxy-or-2-halogeno)-anthraquinone with an alcohol of formula R1-OH (wherein R1 is the same as R) in the presence of an alkali], is blended with (A) a nematic liquid crystal to obtain the desired compsn. for liquid crystal color display. The compsn. has large dichroic ratio, exhibits large contrast ratio by the application of voltage-no voltage, excels in durability, is stable, and does not lower the performance of a device even though the device is used for many hours.
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公开(公告)号：JPS56100885A
公开(公告)日：1981-08-13
申请号：JP310080
申请日：1980-01-17
Applicant: MITSUI TOATSU CHEMICALS
Inventor： NISHIZAWA ISAO , TSUKAHARA RIYOUICHI , MORINAKA RIYOUICHI , HIDAKA TSUNEO
Abstract: NEW MATERIAL:An anthraquinone derivative shown by formula I (wherein R is H, 1-15C straight or branched alkyl, cyclohexyl). EXAMPLE:A compound shown by formula II. USE:A dyestuff coloring a nematic liquid crystal to a clear favorable blue color and having an extremely high two-color ratio (contrast) and excellent light fastness. PREPARATION:1,5-Dihydroxy-4,8-diamino-anthraquinone-2,6-disulfonic acid and a compound shown by formula III (wherein R1 is H, 1-15C straight or branched alkyl, cyclohexyl) are reacted in the presence of boric acid in sulfuric acid to oxidize a borate ester group and then desulfonated to synthesize the compound of formula I.
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公开(公告)号：JPS564678A
公开(公告)日：1981-01-19
申请号：JP8011079
申请日：1979-06-27
Applicant: MITSUI TOATSU CHEMICALS
Inventor： NISHIZAWA ISAO , MORINAKA RIYOUICHI , TSUKAHARA RIYOUICHI , HIDAKA TSUNEO
Abstract: PURPOSE:To provide titled compsn. which is colored red by the application of electric voltage, consisting of a specified anthraquinone compd. and a nematic liquid crystal. CONSTITUTION:1.5-Diamino-4,8-dihydroxy-anthraquinonedisulfonic acid is reacted with a compd. of formula I [wherein R1 is 1-15C alkyl or a group of formula -R2- 0-R3 (wherein R2 is 1-3C straight or branched chain alkylene; R3 is 1-15C straight or branched chain alkyl] in the presence of boric acid and in sulfuric acid. The resulting product is reacted with a reducing agent to remove the sulfonic group. The amino group are replaced with hydroxyl group to obtain an anthraquinone compd. of formula II. 0.1-3% of the anthraquinone compd. is blended with a nematic liquid crystal to obtain the desired compsn. for liquid crustal color display element. The compsn. exhibits large contrast ratio by the application of voltage-no voltage, excels in durability, is stable, and does not lower the performance of a device even when the device is used for many hours.
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公开(公告)号：JPS55157676A
公开(公告)日：1980-12-08
申请号：JP6399679
申请日：1979-05-25
Applicant: MITSUI TOATSU CHEMICALS
Inventor： NISHIZAWA ISAO , MORINAKA RIYOUICHI , TSUKAHARA RIYOUICHI , HIDAKA TSUNEO
IPC: C09K19/60 , C09B1/02 , C09B1/14 , C09B1/16 , C09B1/28 , C09B1/32 , C09B1/50 , C09B1/514 , C09B1/515 , C09B1/54 , G02F1/13 , G02F1/137 , G09F9/00 , G09F9/35
Abstract: PURPOSE:The title composition, usable for a color display on a watch or electronic calculator by the guest-host method, having improved coloring property, dichromatic ratio and durability, and comprising a specific anthraquinone dye and nematic liquid crystals. CONSTITUTION:A composition comprising (A) an anthraquinone dye of formula I [X and Y are amino or hydroxy groups; Z is methoxy, formula II or III [R1 is H, halogen atom or 1-15C (branched) alkyl group] or -NH-R2 [R2 is 1-15C (branched) alkyl group)] and (B) nematic liquid crystals, e.g. a mixture of 4- cyano-4'-n-pentylbiphenyl with 4-cyano-4'-n-propoxybiphenyl. The amount of (A) is preferably 0.1-3% based on (B). The dye (A) is obtained by recrystallizing a crude dye prepared from phenol and 1-amino-2-bromo-4-hydroxyanthraquinone from an organic solvent.
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公开(公告)号：JPS53144559A
公开(公告)日：1978-12-15
申请号：JP5884077
申请日：1977-05-23
Applicant: MITSUI TOATSU CHEMICALS
Inventor： MORINAKA RIYOUICHI , KAWAKAMI MICHIO , IWAMURA AKIO , YOSHIURA KOUICHI
Abstract: PURPOSE:To prepare beta-naphthol having stability to coloring and low content of alpha-naphtol by dissolving beta-naphthol in water contg. an org. acid or inotg acid at >=90 deg.C, followed by crystallization on cooling, or by treatment of fine particle of the beta-naphthol with the acidic water at room temp.
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Patent Agency Ranking
公开(公告)号：JPS59203790A
公开(公告)日：1984-11-17
申请号：JP7889483
申请日：1983-05-07
Applicant: Mitsui Toatsu Chemicals
Inventor： MORINAKA RIYOUICHI , TERADA FUMIO , YOSHIOKA TAKESHI , MIYAZAKI YUUJI
IPC: C06D3/00
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公开(公告)号：JPS55155083A
公开(公告)日：1980-12-03
申请号：JP6271379
申请日：1979-05-23
Applicant: MITSUI TOATSU CHEMICALS
Inventor： NISHIZAWA ISAO , MORINAKA RIYOUICHI , TSUKAHARA RIYOUICHI , HIDAKA TSUNEO
Abstract: PURPOSE:Titled composition suited for use in electronic calculator comprising a nematic liquid crystal and a specific, anthraquinone type, dichromatic dye which has excellent durability and which, in a small amount, exhibits satisfactory coloring power. CONSTITUTION:Titled composition is obtained by mixing (a) an anthraquinone type dischromatic dye expressed by structural formula II, (wherein R is a linear or branched 1-15C alkyl or a cyclohexyl, and X is H or amino), and prepared by reacting, with heating, in an inert solvent, 3-amino-1,2-dihydroxyanthraquinone with a compound represented by formula I, (wherein R is the same as above); nitrating the resulting compound; and reducing the nitrated compound with a reducing agent such as sodium hydrosulfide or sodium hydrosulfite, with (b) a nematic liquid crystal such as one consisting mainly of 4-cyano-4'-n-pentylbiphenyl or 4-cyano-4'-n-propoxybiphenyl.
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公开(公告)号：JPS55155082A
公开(公告)日：1980-12-03
申请号：JP6223379
申请日：1979-05-22
Applicant: MITSUI TOATSU CHEMICALS
Inventor： NISHIZAWA ISAO , MORINAKA RIYOUICHI , TSUKAHARA RIYOUICHI , HIDAKA TSUNEO
Abstract: PURPOSE:Titled composition suited for use in electronic calculator, comprising a nematic luquid crystal and a specific, anthraquinone type, dichromatic dye which has excellent durability and which, in a small amount, exhibits satisfactory coloring power. CONSTITUTION:Titled composition is prepared by mixing (a) an anthraquinone type dichromatic dye such as a dye having formula III, expressed by structural formula II, (wherein R1 is a 1-3C alkyl or a group R2-O-R3; R2 is a 1-3C alkylene and R3 is a 1-3C alkyl), and prepared by reacting, in sulfuric acid and in the presence of boric acid, 1,5-diamino-4-8-dihydroxy-anthraquinone-disulfonic acid with a compound represented by formula I, (wherein R1 is the same as above), desulfonating the resulting compound and purifying the desulfonated product, with (b) a nematic liquid crystal such as one consisting mainly of 4-cyano-4'-n-pentylbiphenyl or 4-cyano-4'-n-propoxybiphenyl.
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公开(公告)号：JPS53144558A
公开(公告)日：1978-12-15
申请号：JP5883977
申请日：1977-05-23
Applicant: MITSUI TOATSU CHEMICALS
Inventor： MORINAKA RIYOUICHI , KAWAKAMI MICHIO , IWAMURA AKIO , YOSHIURA KOUICHI
Abstract: PURPOSE:To protect coloring of beta-naphthol by addition org. phosphorous acids (>=0.001 %, pref. 0.005-0.1%) such as tris(monylphenyl)phosphite.
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公开(公告)号：JPS57183322A
公开(公告)日：1982-11-11
申请号：JP6425481
申请日：1981-04-30
Applicant: MITSUI TOATSU CHEMICALS
Inventor： MORINAKA RIYOUICHI , KOGA HARUYOSHI , NODA SEIJI , TERADA FUMIO
IPC: C01D1/28
Abstract: PURPOSE:To remove chlorates simply and easily, by heating a caustic alkali containing the chlorates as impurities with sodium formaldehyde sulfoxylate in the presence of a ferrous or ferric salt. CONSTITUTION:NaOH prepared by the electrolysis through the diaphragmatic process of an aqueous solution of NaCl contains a very small amount of NaClO3. For removing the NaClO3, 0.1-0.2mol, expressed in terms of Fe, based on NaClO3, ferrous salt, e.g. FeCl2, or ferric salt, e.g. FeCl3, is added to the NaOH. 2-4mol, based on NaClO3, sodium formaldehyde sulfoxylate is further added, and the resultant mixture is heated at 90-108 deg.C under stirring to remove toxic NaClO3 by the reductive cleavage without deteriorating the quality of the NaOH.
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