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    BROMINATION OF BENZANTHRONE
    1.
    发明专利
    BROMINATION OF BENZANTHRONE 失效

    公开(公告)号：JPH0977715A

    公开(公告)日：1997-03-25

    申请号：JP23711595

    申请日：1995-09-14

    Applicant: MITSUI TOATSU CHEMICALS

    Inventor： OKUMA TADASHI ,  ITO NAOTO

    IPC: C07C45/63 ,  C07C49/697 ,  C09B3/08

    Abstract: PROBLEM TO BE SOLVED: To produce 3,9-dibromobenzanthrone useful as a synthetic intermediate for a dye, etc., in a process capable of separating it without needing a recovery process for bromine at high yield and high quality by reacting benzanthrone with bromine in sulfuric acid in the presence of nitrosylsulfuric acid. SOLUTION: A compound of formula II is produced by reacting (C) benzanthrone of formula I with (D) bromine in (A) sulfuric acid in the presence of (B) nitrosylsulfuric acid. Further, it is preferable that the component B and the component D are used at molar ratios of 0.01-5.0 and 0.9-3.0 against the component C, respectively. Concretely, for instance, sodium nitrite is added to 98% sulfuric acid to prepare the component B in the component A; the component C is added to the mixture; the temperature is elevated up to 10-80 deg.C, especially 40-60 deg.C and the component D is added dropwise; further, the reaction mixture is stirred for a specified time at 20-100 deg.C, especially 50-90 deg.C; water is discharged from the reaction mixture after degassing, and a solid is filtered and washed with water.

    MANUFACTURE OF YELLOW PIGMENT
    3.
    发明专利
    MANUFACTURE OF YELLOW PIGMENT 失效

    公开(公告)号：JPH08283593A

    公开(公告)日：1996-10-29

    申请号：JP8921595

    申请日：1995-04-14

    Applicant: MITSUI TOATSU CHEMICALS

    Inventor： YAMANO KATSUHIKO ,  NISHIHARA MASUMI ,  ITO NAOTO

    IPC: C07D487/06 ,  C09B57/12

    Abstract: PURPOSE: To produce a yellow pigment weak in reddish orange color and covering power. CONSTITUTION: A reaction mixture obtained by condensation reaction of 1,4,5,8- naphthalenetetracarboxylic acid with o-phenylenediamine is reacted with a potassium salt in the presence of a solvent, followed by hydrolysis at 55 deg.C or below to produce trans-naphthoylenebisbenzimidazole.

    YELLOW COLORING MATTER FOR THERMAL TRANSFER RECORDING, INK COMPOSITION FOR THERMAL TRANSFER RECORDING AND TRANSFER SHEET
    4.
    发明专利
    YELLOW COLORING MATTER FOR THERMAL TRANSFER RECORDING, INK COMPOSITION FOR THERMAL TRANSFER RECORDING AND TRANSFER SHEET 失效

    公开(公告)号：JPH0811443A

    公开(公告)日：1996-01-16

    申请号：JP15190594

    申请日：1994-07-04

    Applicant: MITSUI TOATSU CHEMICALS

    Inventor： MATSUZAKI YORIAKI ,  OGISO AKIRA ,  SHIMOKAWA YASUSHI ,  ITO NAOTO ,  TAKUMA HIROSUKE

    IPC: B41M5/385 ,  B41M5/388 ,  B41M5/39 ,  C09B29/42 ,  B41M5/38

    Abstract: PURPOSE:To obtain a transfer sheet having a high sublimation rate and excellent in image stability after transfer by using an ink compsn. prepared by compounding coloring matter for thermal transfer recording represented by a specific general formula, a binder resin and a solvent. CONSTITUTION:An ink compsn. for thermal transfer recording is prepared by compounding yellow coloring matter for thermal transfer recording represented by formula (R is a 3-8C branched or cyclic substituted or non- substituted alkyl group and R is a 5-10C branched or cyclic substituted or non-substituted alkoxyalkyl group), a binder resin and an org. solvent and/or water. This ink compsn. is applied to the single surface of a base material sheet and dried to form a coloring matter support layer to obtain a transfer sheet. When thermal transfer recording is performed, the transfer sheet is superposed on a material to be recorded and heated and pressed according to a recording pattern from the back surface of the transfer sheet by a thermal recording head to transfer the coloring matter on the transfer sheet to the material to be recorded.

    PRODUCTION OF QUINOPHTHALONEDICARBOXYLIC ACID HAVING HIGH PURITY
    5.
    发明专利
    PRODUCTION OF QUINOPHTHALONEDICARBOXYLIC ACID HAVING HIGH PURITY 失效

    公开(公告)号：JPH0748352A

    公开(公告)日：1995-02-21

    申请号：JP19593993

    申请日：1993-08-06

    Applicant: MITSUI TOATSU CHEMICALS

    Inventor： OGISO AKIRA ,  MISAWA TSUTAYOSHI ,  IMAI RIHOKO ,  ITO NAOTO ,  IRISATO YOSHIHIRO ,  TAKUMA HIROSUKE

    IPC: C07D215/20 ,  C09B25/00

    Abstract: PURPOSE:To obtain quinophthalonedicarboxylic acid having high purity and useful as an intermediate for pigment, etc., by hydrolyzing and neutralizing a specific quinophthalonedicarboxylic acid anhydride with an alkaline compound to obtain a solubilized product, removing insoluble impurities by filtration and adding an acid to precipitate the free acid. CONSTITUTION:This quinophthalonedicarboxylic acid having high purity and expressed by the formula III can be produced by adding an aqueous solution of an alkaline compound (e.g. sodium hydroxide) to a quinophthalonedicarboxylic acid anhydride expressed by the formula I (X is H, halogen or alkyl), heating the liquid mixture to 50 deg.C after confirming the adjustment of pH to 12.9, stirring for 2hr at 50-52 deg.C to effect the hydrolysis and neutralization of the compound and form a solubilized quinophthalone compound salt expressed by the formula II (Y and Z are cation), removing insoluble impurities from the product by filtration, adding an acid (e.g. sulfuric acid) to adjust the pH to 1.95, heating at 90 deg.C, keeping at the temperature for 2hr, adding water to precipitate crystals, collecting the crystal by filtration and drying the product.

    NEAR-INFRARED ABSORBING FILM
    7.
    发明专利
    NEAR-INFRARED ABSORBING FILM 失效

    公开(公告)号：JPH06279597A

    公开(公告)日：1994-10-04

    申请号：JP6966393

    申请日：1993-03-29

    Applicant: MITSUI TOATSU CHEMICALS

    Inventor： OI TATSU ,  ITO NAOTO

    IPC: C08J5/18 ,  C08K5/3467 ,  C08L33/04 ,  C08L33/08

    Abstract: PURPOSE:To provide a near-infrared absorbing film improved in heat rays shielding effect and light resistance by incorporating a specific phthalocyanine compd. into a polyalkyl acrylate resin. CONSTITUTION:A polyalkyl acrylate resin is blended with a phthalocyanine compd. of the formula [wherein A to A are each H, halogen, (un)substd. alkyl, or (un)substd. alkoxy, provided that each of the pairs of A and A , A and A , A and A , and A and A is not simultaneously H; B to B are respective H, halogen, (un)substd. alkyl, (un)substd. alkoxy, (un)substd. aryloxy, or (un) substd. arylthio; and M is a bivalent metal atom, a trivalent or tetravelent substd. metal atom, or oxymetal]. The resulting mixture is heat-melted at 150 to 300 deg.C, and then formed into a film to obtain a master roll. The master roll film is monoaxially or biaxially oriented 2- to 5-fold at 60 to 90 deg.C to obtain a near-infrared absorbing film having a thickness of 10 to 200mum and a phthalocyanine compd. content of 1 to 10,000mg/m .

    DICHLOMATIC AZO DYE AND POLARIZING FILM USING THE SAME
    10.
    发明专利
    DICHLOMATIC AZO DYE AND POLARIZING FILM USING THE SAME 失效

    公开(公告)号：JPH05320530A

    公开(公告)日：1993-12-03

    申请号：JP12705692

    申请日：1992-05-20

    Applicant: MITSUI TOATSU CHEMICALS

    Inventor： MISAWA TSUTAYOSHI ,  OGISO AKIRA ,  ITO NAOTO ,  IMAI RIHOKO

    IPC: C09B35/035 ,  C09B35/34 ,  C09B56/06 ,  G02B1/08 ,  G02B5/30

    Abstract: PURPOSE:To obtain a new compound excellent in polarizing performance, dimensional stability to heat and wet heat resistance and useful for polarizing film, etc., for liquid crystal display. CONSTITUTION:A compound of formula I [R1 is H, methyl, hydroxyl or chloro; R2 and R3 are (substituted)1-3C alkyl; R2 and R3 are cyclized to form an alicyclic amino group], e.g. a compound of formula II. Furthermore, the compound of formula I is obtained by subjecting a compound of formula III to tetrazo forming reaction and then subjecting the resultant compound to coupling reaction with a compound of formula IV.

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