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    Electrostatic developer with core-shell carrier coated with silicone - contg. urethane bond, giving stable negative charging property under wide range of environmental conditions
    2.
    发明专利
    Electrostatic developer with core-shell carrier coated with silicone - contg. urethane bond, giving stable negative charging property under wide range of environmental conditions 未知

    公开(公告)号：DE4323806A1

    公开(公告)日：1994-01-20

    申请号：DE4323806

    申请日：1993-07-15

    Applicant: KAO CORP

    Inventor： SATO YUKIYA ,  TAJIMA HISAKAZU ,  UENO YOSHIHIRO ,  KAMEYAMA KOUJI ,  NAWA MASAYOSHI

    IPC: C09D183/10 ,  G03G9/087 ,  G03G9/113 ,  C08L75/04 ,  C08L83/10 ,  G03G9/097

    Abstract: Developer compsn. (I) for electrostatic latent images has a core-shell carrier (II) and a toner (III) of binder resin (IV) and dyestuff (V), (II) having a coating of silicone resin (VI) with a urethane bond. (I) contains 100 (wt.) pts. (II) and 2-10 pts. (III). (II) comprises 100 pts. core material and 0.2-1.6 pts. (VI). (III) contains 100 pts. (IV) and 1-15 pts. (V) and may also contain colloidal silica, Al2O3, polymer beads, polyolefin and/or esp. a charge controller (XI), wax and/or hydrophobic silica (XII). USE/ADVANTAGE - (I) is useful for electromagnetic scanning development. (I) has high negative charging capacity, even under conditions of low temp./low humidity and high temp./high humidity, excellent fixing property and transparency. In an example, carriers were prepd. by spray coating 100 pts. spherical ferrite core material with a dispersion of (A) 0.7, (B) 0.9 pt. mixt. of methyldimethylsilicone resin 'SR2400' (RTM) contg. 5% methyltrimethoxysilane as (IX), (A) 0.15, (B) 0 pt. 'TSR 175' (RTM) as (VIII) and (A) 0.05, (B) 0 pt. 'Coronate 2031' (RTM) as (X) in MEK and heated 30 mins. in a fluidised bed reactor at 300 deg.C. A polyester resin (IVA) was prepd. by polycondensation of 175g polyoxypropylene-(p = 2.0, average)-bisphenol A, 162.5g polyoxyethylene-(p = 2.0, average)-bisphenol A, 83g terephthalic acid, 38.4g trimellitic anhydride and 53.6g dodecenylsuccinic acid, using SnO2 as catalyst. A toner (IIIA) was prepd. by melt kneading 100 pts. (IVA) with 8 pts. C black (Mogul L' (RTM), 1.5 pts. 'Bontron S-34' (RTM) as (XI) and 3.0 pts. wax, pulverising, classifying to an average dia. of 8 microns and adding 0.5% 'R 972'(RTM) as (XII). 1000 Pts. carrier (A) or (B) were mixed with 40 pts. (IIIA) and used in an electrophotographic copier. The copy quality initially after 20,000 copies was (A) o/o, (B) 0/+ at 25 deg.C/50% RH; (A) o/o, (B) +/x at 35 deg.C/85% RH; and (A) 0/0, (B) +/x at 10 deg.C/20% RH (scale o = image density 1.4 or more and fogging 0.01 or less; + = one of these not in class 'o'; x = neither in class 'o').

    4.
    发明专利
    未知

    公开(公告)号：DE3784201D1

    公开(公告)日：1993-03-25

    申请号：DE3784201

    申请日：1987-08-13

    Applicant: KAO CORP

    Inventor： KAWABE KUNIYASU ,  NAWA MASAYOSHI ,  HAYASHI NORIHIRO

    IPC: C08G63/668 ,  G03G9/087 ,  G03G9/097 ,  G03G9/08

    Abstract: An electrophotographic developer composition comprises a polyester obtained by co-condensation polymerization of (i) a diol component represented by the general formula: wherein R is an ethylene or propylene group and x and y are each an integer of 1 or above, with the proviso that the average sum total of x and y is 2 to 7, with (ii) a dicarboxylic acid or anhydride or a lower alkyl ester thereof and (iii) a polycarboxylic acid having at least three carboxyl groups or anhydride or a lower alkyl ester thereof or a polyhydric alcohol having at least three hydroxyl groups and having an OHV/AV value of at least 1.2 wherein AV is an acid value of the polyester and OHV is a hydroxyl value thereof as a major component of a binder resin and at least two charge controllers. r

    7.
    发明专利
    未知

    公开(公告)号：DE3784201T2

    公开(公告)日：1993-08-05

    申请号：DE3784201

    申请日：1987-08-13

    Applicant: KAO CORP

    Inventor： KAWABE KUNIYASU ,  NAWA MASAYOSHI ,  HAYASHI NORIHIRO

    IPC: C08G63/668 ,  G03G9/087 ,  G03G9/097 ,  G03G9/08

    Abstract: An electrophotographic developer composition comprises a polyester obtained by co-condensation polymerization of (i) a diol component represented by the general formula: wherein R is an ethylene or propylene group and x and y are each an integer of 1 or above, with the proviso that the average sum total of x and y is 2 to 7, with (ii) a dicarboxylic acid or anhydride or a lower alkyl ester thereof and (iii) a polycarboxylic acid having at least three carboxyl groups or anhydride or a lower alkyl ester thereof or a polyhydric alcohol having at least three hydroxyl groups and having an OHV/AV value of at least 1.2 wherein AV is an acid value of the polyester and OHV is a hydroxyl value thereof as a major component of a binder resin and at least two charge controllers. r

    WATER-BASE PIGMENT INK
    8.
    发明公开
    WATER-BASE PIGMENT INK 失效
    水性颜料墨水

    公开(公告)号：EP0761781A4

    公开(公告)日：1998-11-18

    申请号：EP95940451

    申请日：1995-12-15

    Applicant: KAO CORP

    Inventor： YOSHIDA SATOSHI ,  YANAGI HIDEKI ,  SAKAI KOUICHI ,  NAWA MASAYOSHI

    IPC: C09D11/00 ,  B41M5/00

    CPC classification number: C09D11/326

    Abstract: A water-base pigment ink containing a pigment, water and a water-soluble solvent as the principal components and further containing a sulfite salt and optionally a dispersant comprising a copolymer of a monomer represented by general formula (A) with a monomer selected from among compounds represented by general formulae (B) and (C): wherein AO represents a C2-C3 oxyalkylene group; and n represents an integer of 110 to 300. This ink is particularly suitable for the ink-jet recording system utilizing thermal energy.

    10.
    发明专利
    未知

    公开(公告)号：ES2044882T3

    公开(公告)日：1994-01-16

    申请号：ES87111758

    申请日：1987-08-13

    Applicant: KAO CORP

    Inventor： KAWABE KUNIYASU ,  NAWA MASAYOSHI ,  HAYASHI NORIHIRO

    IPC: C08G63/668 ,  G03G9/087 ,  G03G9/097 ,  G03G9/08

    Abstract: An electrophotographic developer composition comprises a polyester obtained by co-condensation polymerization of (i) a diol component represented by the general formula: wherein R is an ethylene or propylene group and x and y are each an integer of 1 or above, with the proviso that the average sum total of x and y is 2 to 7, with (ii) a dicarboxylic acid or anhydride or a lower alkyl ester thereof and (iii) a polycarboxylic acid having at least three carboxyl groups or anhydride or a lower alkyl ester thereof or a polyhydric alcohol having at least three hydroxyl groups and having an OHV/AV value of at least 1.2 wherein AV is an acid value of the polyester and OHV is a hydroxyl value thereof as a major component of a binder resin and at least two charge controllers. r

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