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    COLOR MATERIAL DISPERSION, INK FOR INK JET RECORDING AND INK JET RECORDING
    21.
    发明专利
    COLOR MATERIAL DISPERSION, INK FOR INK JET RECORDING AND INK JET RECORDING 失效

    公开(公告)号：JPH10251589A

    公开(公告)日：1998-09-22

    申请号：JP6295097

    申请日：1997-03-17

    Applicant: KAO CORP

    Inventor： ISHII MASUKAME ,  SAKUMA TADASHI ,  SUZUKI SHOICHI ,  TSUJII YOSHIAKI ,  SUZUKI ATSUSHI

    IPC: B41M5/00 ,  C09D11/00 ,  C09D11/322 ,  C09D11/324 ,  C09D11/326 ,  C09D11/328 ,  C09D11/38 ,  C09D17/00

    Abstract: PROBLEM TO BE SOLVED: To obtain the subject dispersion excellent in long-term storage stability and environmental stability by using a polymer dispersion obtained from a specific raw material as a dispersion. SOLUTION: This color material dispersion comprises (A) a water-insoluble or slightly water-soluble coloring material, (B) a polymer dispersion obtained by subjecting a sulfonated product obtained by sulfonating creosote oil to formalin condensation and neutralizing the condensed product and (C) a water-soluble medium. When concentrated sulfuric acid is used as the sulfonating agent in preparing the component B, creosote oil is charged into a reactor having an agitator and then, concentrated sulfuric acid is added thereto at 150-170 deg.C and sulfonation is preferably carried out for 1-2hr. Weight average molecular weight of the component B is preferably 2,000 to 50,000. It is preferable to include 15-30wt.% component A, 1.5-30wt.% component B and 50-83wt.% component C in the objective dispersion. The weight ratio of the components A/B is preferably (100/100) to (100/30). Pigment, oil-soluble dye, etc., is preferably used as the component A.

    PRODUCTION OF INK FOR INK JET RECORDING
    23.
    发明专利
    PRODUCTION OF INK FOR INK JET RECORDING 失效

    公开(公告)号：JPH1060331A

    公开(公告)日：1998-03-03

    申请号：JP21353596

    申请日：1996-08-13

    Applicant: KAO CORP

    Inventor： ISHII MASUKAME ,  SAKUMA TADASHI ,  YANAGI HIDEKI ,  SUZUKI SHOICHI ,  WAKABAYASHI SHIGEMI ,  TSUJII YOSHIAKI ,  AIDA KENJI

    IPC: C09D11/00 ,  C09D11/02 ,  C09D11/023 ,  C09D11/033 ,  C09D11/037 ,  C09D11/322 ,  C09D11/324 ,  C09D11/326 ,  C09D11/38

    Abstract: PROBLEM TO BE SOLVED: To obtain a process for producing an ink for ink jet recording whereby a pigment can be dispersed with an improved dispersibility into particles with uniform particle sizes by subjecting a pigment dispersion to ultrasonic treatment at specified output and frequency. SOLUTION: A pigment dispersion contg. a pigment, a polymeric dispersant, a water-soluble solvent, and water is subjected to ultrasonic treatment at an output of 250-3,000W and a frequency of 20-50kHz to disperse the pigment. The polymeric dispersant used id pref. a (meth)acrylic acid deriv. copolymer, esp, one obtd. by copolymerizing a monomer represented by formula I (R1 and R2 are each H or lower alkyl; m1 is 0-2; AO is 2-3C oxyalkylene; n is 1-300; and X is H or lower alkyl) and a monomer (including its acid anhydride) represented by formula II [R3 to R5 are each H, lower alkyl, or (CH2 )m2 COOM2 (wherein M1 and M2 are each H, an alkali or alkaline earth metal, ammonium, or an amine, and m2 is 0-2].

    WATER-BASED PIGMENT INK
    25.
    发明专利
    WATER-BASED PIGMENT INK 失效

    公开(公告)号：JPH1046084A

    公开(公告)日：1998-02-17

    申请号：JP21026496

    申请日：1996-08-08

    Applicant: KAO CORP

    Inventor： WAKABAYASHI SHIGEMI ,  ISHII MASUKAME ,  SAKUMA TADASHI ,  YANAGI HIDEKI ,  SUZUKI SHOICHI ,  TSUJII YOSHIAKI ,  AIDA KENJI

    IPC: C09D11/00 ,  C09D11/023 ,  C09D11/033 ,  C09D11/037 ,  C09D11/10 ,  C09D11/102 ,  C09D11/106 ,  C09D11/107 ,  C09D11/108 ,  C09D11/322 ,  C09D11/324 ,  C09D11/326 ,  C09D11/38

    Abstract: PROBLEM TO BE SOLVED: To obtain the subject ink excellent in pigment dispersion stability and dryability, thus useful for ink jet printing use, comprising a pigment, (meth) acrylic acid derivative copolymer, aliphatic monohydric alcohol, water-soluble solvent and water. SOLUTION: This water-based pigment ink excellent in pigment dispersibility and ink dryability comprises (A) a pigment such as carbon black, (B) a copolymer from a (meth)acrylic acid derivative of formula I (R1 and R2 are each H or a lower alkyl; (m1 ) is an integer of 0-2; AO is a 2-3C oxyalkylene; (n) is an integer of 1-300; X is H or a lower alkyl) and a monomer of formula II [R3 to R5 are each H, a lower alkyl or a group of the formula (CH2 )m2 COOM2 (M2 is H, an alkali metal, alkaline earth metal, ammonium or amine; (m2 ) is an integer of 0-2); M1 is the same kind as M2 ], (C) an aliphatic monohydric alcohol (e.g. ethyl alcohol), (D) a water-soluble solvent (e.g. diethylene glycol), and water as aqueous medium.

    AQUEOUS PIGMENT INK
    27.
    发明专利
    AQUEOUS PIGMENT INK 失效

    公开(公告)号：JPH1060351A

    公开(公告)日：1998-03-03

    申请号：JP21760696

    申请日：1996-08-19

    Applicant: KAO CORP

    Inventor： YANAGI HIDEKI ,  ISHII MASUKAME ,  SAKUMA TADASHI ,  SUZUKI SHOICHI ,  WAKABAYASHI SHIGEMI ,  TSUJII YOSHIAKI ,  AIDA KENJI

    IPC: C09D11/00 ,  C09D11/02 ,  C09D11/033 ,  C09D11/037 ,  C09D11/10 ,  C09D11/102 ,  C09D11/106 ,  C09D11/107 ,  C09D11/108 ,  C09D11/322 ,  C09D11/324 ,  C09D11/326 ,  C09D11/38

    Abstract: PROBLEM TO BE SOLVED: To provide an aqueous pigment ink which is excellent in storage stability and, especially when it is used as an ink-jet recording ink, is free from clogging at a printer head, so that a good stability in its discharging is performed. SOLUTION: In an aqueous pigment ink containing a pigment, a polymer dispersing, a water-soluble solvent and water as main components, as the polymer dispersant, use is made of a copolymer obtained by using a polyalkylene glycol mono(meth)acrylate monomer trepresented by formula I, wherein R is H or 1-3C alkyl; R is ethylene or propylene; R3 is butylene; R is H or 1-5C alkyl or alkenyl; M+n is 5 to 300; and m:n=10:90 to 90:10, and a (meth)acrylic acid monomer represented by formula II, wherein R is H or 1-3C alkyl; X is H, a monovalent metal, a divalent metal, ammonium or an organic amine, in amounts of 10 to 5wt.% and 50 to 90wt.%, respectively, or a copolymer obtained by neutralizing this copolymer with an alkaline substance.

    WATER-BASE PIGMENT INK
    30.
    发明专利
    WATER-BASE PIGMENT INK 失效

    公开(公告)号：JPH1053738A

    公开(公告)日：1998-02-24

    申请号：JP21170596

    申请日：1996-08-09

    Applicant: KAO CORP

    Inventor： ISHII MASUKAME ,  SAKUMA TADASHI ,  YANAGI HIDEKI ,  SUZUKI SHOICHI ,  WAKABAYASHI SHIGEMI ,  TSUJII YOSHIAKI ,  AIDA KENJI

    IPC: C09D11/00 ,  C09D11/023 ,  C09D11/033 ,  C09D11/037 ,  C09D11/10 ,  C09D11/102 ,  C09D11/106 ,  C09D11/107 ,  C09D11/108 ,  C09D11/322 ,  C09D11/324 ,  C09D11/326 ,  C09D11/38

    Abstract: PROBLEM TO BE SOLVED: To obtain a water-base pigment ink improved in the reproducibility of ink flight and print quality by mixing a pigment with a specified polymeric dispersant, a water-soluble solvent and water. SOLUTION: A mixture comprising 0.1-10 monomer which is represented by formula I (wherein R1 and R2 are each H or a lower alkyl; m1 is 0-2: AO is a 2 or 3C oxyalkylene; n is 1-300; and X is H or a lower alkyl) and in which n (the number of the introduced oxyalkylene groups) is 1 or 2 and 90-99.9mol% monomer represented by formula I (wherein n is 3 or greater) is copolymerized with a monomer represented by formula II [wherein R3 to R5 are each H, a lower alkyl or (CH2 )m2 COOM2 ; M1 and M2 are each an alkali (alkaline earth) metal, ammonium or an amine; and m2 is 0-2] or its anhydride in a molar ratio of (0.1-100)/100 to obtain a polymeric dispersant comprising a copolymer having a weight-average molecular weight of 5,000-200,000. 1-15wt.% pigment is mixed with 0.1-4wt.% above polymer dispersant, 0.1-30wt.% water-soluble solvent, 70-98wt.% water and 0.004-5wt.% dispersibility improver.

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