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    WATER-BASED INK
    111.
    发明专利
    WATER-BASED INK 审中-公开

    公开(公告)号：JP2003138173A

    公开(公告)日：2003-05-14

    申请号：JP2001335049

    申请日：2001-10-31

    Applicant: KAO CORP

    Inventor： WAKABAYASHI SHIGEMI ,  NAKANO YUKIHIRO

    IPC: B41J2/01 ,  B41M5/00 ,  C09D11/00 ,  C09D11/322 ,  C09D11/324 ,  C09D11/328

    Abstract: PROBLEM TO BE SOLVED: To provide a water-based ink imparting a high print density, and having excellent jetting stability, abrasion resistance and marker resistance. SOLUTION: This water-based ink contains a water dispersion of polymer particles including a water-insoluble coloring matter in a polymer slightly soluble in water and having an ionic group. The content of the water-soluble component in the polymer slightly soluble in the water in an unneutralized state is

    INK FOR INK JET RECORDING
    112.
    发明专利
    INK FOR INK JET RECORDING 失效

    公开(公告)号：JPH11228885A

    公开(公告)日：1999-08-24

    申请号：JP3329498

    申请日：1998-02-16

    Applicant: KAO CORP

    Inventor： WAKABAYASHI SHIGEMI ,  ISHII MASUKAME

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

    Abstract: PROBLEM TO BE SOLVED: To obtain the subject ink in which storage elastic modulus of ink measured after drying an ink containing a water-insoluble colorant, a storage elastic modulus-controlling agent, a dispersing agent and an aqueous medium is a specific value or below and intermittent printing characteristics after releasing for a definite time is improved. SOLUTION: This ink comprises preferably 1.5-5 wt.% water-insoluble or slightly water-soluble coloring material, preferably 3-30 wt.% storage elastic modulus-controlling agent (preferably having 2,000-20,000 weight average molecular weight), preferably 0.2-5 wt.% dispersing agent (preferably a polymer dispersing agent obtained by subjecting a sulfonated product obtained by sulfonating an aromatic compound containing a polynuclear aromatic compound to formalin condensation and then neutralizing the condensation product) and preferably 95.3-60 wt.% aqueous medium. Storage elastic modulus of the ink measured according to ASTM D-4440-93 after the ink is dried at 50 deg.C for 72 hr is dyne/cm in the range of 10 to 10 rad/sec frequency.

    AQUEOUS PIGMENT INK
    114.
    发明专利
    AQUEOUS PIGMENT INK 失效

    公开(公告)号：JPH1053741A

    公开(公告)日：1998-02-24

    申请号：JP21141096

    申请日：1996-08-09

    Applicant: KAO CORP

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

    IPC: C09D11/00 ,  C09D11/02 ,  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 provide an aqueous pigment ink suitable for use in ink-jet recording which is excellent in the dispersion stability of a pigment contained therein, by incorporating a specific alkylene glycol derivative in a mixture of a pigment, a polymer-dispersing agent, a water-soluble solvent and water. SOLUTION: This ink is an aqueous pigment ink comprising a pigment, (A) a polymer-dispersing agent, (B) 0.01 to 3wt.% of a compound represented by formula I, wherein AO is a 2-3C oxyalkylene, n is an number of 6 to 80 and XY is H or a sulfonic acid (sulfonate) group, a water-soluble solvent and water. (B) is preferably polyethylene glycol, polypropylene glycol or a polyethylene glycol disulfate, especially preferably a polyethylene glycol having a molecular weight of 400 to 2,000. Though various dispersing agents may be usable as (A), it is especially preferred that (A) is a (meth)acrylic acid derivative which is a copolymer derived from a compound of formula II, wherein each of R1 and R2 is H or a lower alkyl, m is a number of 0 to 2, n is a number of 1 to 300, X is H or a lower alkyl and AO is as defined above, and a compound of formula III, wherein each of R3 , R4 and R5 is H, a lower alkyl or the like, each of M1 and M2 is H, an alkali metal or the like and m1 is a number of 0 to 2.

    INK FOR INK JET RECORDING
    115.
    发明专利
    INK FOR INK JET RECORDING 失效

    公开(公告)号：JPH1053739A

    公开(公告)日：1998-02-24

    申请号：JP21291796

    申请日：1996-08-12

    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 ,  C09D11/328 ,  C09D11/38

    Abstract: PROBLEM TO BE SOLVED: To obtain an ink for ink jet recording which shows improved frequency response under high-frequency drive conditions by mixing a colorant with a specified water-soluble resin, a surfactant, a water-soluble solvent and water. SOLUTION: A monomer 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) is copolymerized with a monomer represented by formula II [wherein R3 to R5 are each H, a lower alkyl or (CH2 )m2 CM2 ; 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 to 100/100 to obtain a water-soluble resin comprising a copolymer having a weight-average molecular weight of 5,000-200,000. 0.3-10wt.% colorant is mixed with 0.1-10wt.% above water-soluble resin, 0.01-5wt.% anionic surfactant, 0.1-30wt.% water-soluble solvent and 70-98wt.% water to obtain an ink having foam stability after 5min (Ross-Miles tert) of 5-50mm, a surface tension (at 25 deg.C) of 30-60dyn/cm and a viscosity of 0.3-30cP.

    WATER-BASED PIGMENT INK
    116.
    发明专利
    WATER-BASED PIGMENT INK 失效

    公开(公告)号：JPH1046083A

    公开(公告)日：1998-02-17

    申请号：JP21026396

    申请日：1996-08-08

    Applicant: KAO CORP

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

    IPC: C09D11/00 ,  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 high in print denseness, excellent in long- term dispersion stability, and useful for ink jet printing use, comprising a pigment, a dispersant such as an alkylene oxide-added monomer-contg. copolymer, a water-soluble solvent and water. SOLUTION: This water-based pigment ink high in print denseness and excellent in dispersibility under long-term storage, comprises (A) a pigment (e.g. carbon black), (B) a high molecular dispersant consisting of a copolymer of 5,000-200,000 in weight-average molecular weight prepared by copolymerization between 10-50 pts.wt. of an alkylene oxide-added monomer of formula I [X is H, methyl, a group of formula II (R is a 2-3C alkylene; R is H or a 1-3C alkyl: (n) is an integer of 1-300) or a group of formula III ((p) and (q) are each an integer of 1-300); Y is a group of formula IV or formula V] and 50-10 pts.wt. of a 2nd monomer copolymerizable with the 1st monomer, or a copolymer formed by neutralizing the above copolymer, (C) a water-soluble solvent (e.g. diethylene glycol), and (D) water.

    DEVICE FOR PRODUCING MAGNETIC RECORDING MEDIUM
    118.
    发明专利
    DEVICE FOR PRODUCING MAGNETIC RECORDING MEDIUM 失效

    公开(公告)号：JPH08167145A

    公开(公告)日：1996-06-25

    申请号：JP30458194

    申请日：1994-12-08

    Applicant: KAO CORP

    Inventor： SHIGA AKIRA ,  KITAORI NORIYUKI ,  YOSHIDA OSAMU ,  MIZUNOYA HIROHIDE ,  SASAKI KATSUMI ,  MATSUO YUZO ,  WAKABAYASHI SHIGEMI

    IPC: C23C14/24 ,  G11B5/85 ,  H01F41/20

    Abstract: PURPOSE: To prevent the sticking of a magnetic material evaporated from a crucible to a magnetic material feeder and to make the feeder independent of the high temp. of the crucible by disposing the feeder so that it has a specified positional relation to the crucible. CONSTITUTION: A tape-shaped material 5 to be subjected to vapor deposition is allowed to run in a vacuum vessel 1 from a sending roll 6 to a taking up roll 7 through a cooling can 8. A magnetic metal 10 housed in a crucible 3 made of MgO is melted and evaporated by irradiation with electron beams from an electron gun 22 and the evaporated metal is stuck to the material 5 on the cooling can 8 to form a magnetic layer. In accordance with the consumption of the metal 10 in the crucible 3, a magnetic material feeder 13 feeds a pellet-shaped magnetic material of 10mm diameter and 12-20mm length into the crucible 3. The feeder 13 is disposed by the crucible 3 so that the magnetic material is transferred in a horizontal direction through a trough and is charged from the edge of the crucible 3.

    MAGNETIC RECORDING MEDIUM AND MANUFACTURING METHOD THEREOF
    119.
    发明专利
    MAGNETIC RECORDING MEDIUM AND MANUFACTURING METHOD THEREOF 失效

    公开(公告)号：JPH08102418A

    公开(公告)日：1996-04-16

    申请号：JP23805094

    申请日：1994-09-30

    Applicant: KAO CORP

    Inventor： MIZUNOYA HIROHIDE ,  KITAORI NORIYUKI ,  YOSHIDA OSAMU ,  WAKABAYASHI SHIGEMI ,  SHIGA AKIRA

    IPC: C23C14/14 ,  G11B5/64 ,  G11B5/65 ,  G11B5/66 ,  G11B5/73 ,  G11B5/85 ,  H01F10/16 ,  H01F41/20

    Abstract: PURPOSE: To manufacture magnetic recording medium well balanced for the electromagnetic conversion characteristics and anticorrosion by forming a magnetic layer rich in cobalt near the bottom part thereof but rich in nickel near the surface thereof. CONSTITUTION: After producing a specific vacuum atmosphere in a chamber 1 using a vacuum source, cobalt vapor VCo and nickel vapor VNi are obliquely injected into a base film 3 running on a cooling can roll 2 from a supply roll 4 by electron beam emitted from electron guns 8, 9 to crucibles 6, 7. In such a constitution, since the crucible 6 is arranged on the right side from the crucible 7 that is, on the upstream side seen in the upward running direction of the base film 3, the distribution peak of the cobalt vapor VCo in the injection region of the vapor on the cooling can roll 2 is positioned on the upstream side from that of the nickel vapor VNi . Accordingly, the ratio of the nickel vapor VNi to the cobalt vapor VCo is gradually increased in the running direction of the base film 3.

    MANUFACTURE OF MAGNETIC RECORDING MEDIUM
    120.
    发明专利
    MANUFACTURE OF MAGNETIC RECORDING MEDIUM 失效

    公开(公告)号：JPH08102066A

    公开(公告)日：1996-04-16

    申请号：JP23559394

    申请日：1994-09-29

    Applicant: KAO CORP

    Inventor： MIZUNOYA HIROHIDE ,  KITAORI NORIYUKI ,  YOSHIDA OSAMU ,  WAKABAYASHI SHIGEMI ,  SHIGA AKIRA

    IPC: C23C14/58 ,  G11B5/85 ,  H01F41/20

    Abstract: PURPOSE: To provide the manufacture with which the quality of a vapor-deposited thin film of the recording medium can be stabilized by reducing floating oxides in the surface layer of a molten magnetic metallic material to be vapor-deposited on a base film of the medium through blowing gaseous hydrogen onto the surface layer of the molten material. CONSTITUTION: A material 5 on which a vapor-deposited film is formed consists of a film of a resin such as PET, etc., having a 3 to 50μm thickness and is allowed to travel inside a vacuum vessel 1 evacuated to 10 to 10 Torr at an e.g. 5m/min traveling speed by using a traveling device 2 composed of a delivery roll 6, a wind-up roll 7 and a cooling can 8. A crucible 3 made of copper is provided with a melting tank made of MgO and a ferromagnetic metal 10 contg. Co, etc., is charged into this tank. An electron beam generator 4 is provided with an electron gun 11 and the ferromagnetic metal 10 is irradiated with the electron beam generated by the generator 4 to melt and evaporate the metal 10 and to continuously form a magnetic thin film on the material 5. At this time, in order to reduce floating oxides in the surface layer of the molten ferromagnetic metal 10 in the crucible 3, gaseous hydrogen heated to 400 to 2,000 deg.C is blown onto the surface layer of the metal 10 through a nozzle 13 while adjusting the amount of gaseous hydrogen to be blown by operating a shutter 14 from the outside of the vacuum vessel 1.

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