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    ADSORBENT
    142.
    发明专利
    ADSORBENT 失效

    公开(公告)号：JPH0243948A

    公开(公告)日：1990-02-14

    申请号：JP19423188

    申请日：1988-08-03

    Applicant: KAO CORP

    Inventor： FUKUYAMA YUKIHIRO ,  KONDO AKIHIRO ,  TSUSHIMA RIKIO

    IPC: B01J20/26 ,  C08F12/00 ,  C08F212/36

    Abstract: PURPOSE:To obtain a polymer adsorbent having high adsorbing capacity and the good wettability with water by copolymerizing a hydrophobic monomer, which consists of divinylbenzene, a specific styrenic monomer, and a specific water-soluble monomer. CONSTITUTION:99-90wt.% of a hydrophobic monomer consisting of divinylbenzene and a styrenic monomer represented by formula I (wherein R1 is H or CH3 and R2 is H or a 1-3C alkyl group) and 1-10wt.% of a water-soluble monomer having a carboxyl or hydroxyl group are used and suspended or dispersed in an aqueous medium in the presence of a polymerization initiator and a porosity imparting agent to be copolymerized. The polymer particles thus obtained have the good surface wettability with water and excellent adsorbing capacity. Therefore, said particles are excellent in discoloring capacity, deodorizing capacity, and the removal/recovery of impurities.

    ELECTROSTATIC CHARGE IMAGE DEVELOPMENT TONER AND ITS PRODUCTION
    143.
    发明专利
    ELECTROSTATIC CHARGE IMAGE DEVELOPMENT TONER AND ITS PRODUCTION 失效

    公开(公告)号：JPH01235959A

    公开(公告)日：1989-09-20

    申请号：JP6294388

    申请日：1988-03-16

    Applicant: KAO CORP

    Inventor： OTANI SHOJI ,  YAMAGUCHI TAKASHI ,  KATAYOSE MASAHIRO ,  TSUSHIMA RIKIO

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

    Abstract: PURPOSE:To improve the cleaning property of the title toner by constituting the toner of a spherical toner particle having specified mean volume particle size and atomic ratio of a fluorine atom. to a carbon atom. in the surface layer of a toner particle, respectively. CONSTITUTION:The toner is constituted of the spherical toner particle which has the mean volume particle size of 2-20mum and contains the fluorine atom. in the surface layer of the toner particle in the atomic ratio of the fluorine atom. to the carbon atom. of a range of 0.01-1.000. The toner particle is produced by a suspension polymerization method. In this case, when the atomic ratio of the fluorine atom. to the carbon atom. is =1.0, adversely, the effect of the fluorine atom. to the electrostatic charging property of the toner particle becomes large, thereby taking place an undesirable phenomenon in image quality such as a white spot and an image unsharp, etc. Thus, in case that the toner particle is produced by the suspension polymerization, the faulty cleaning property of the toner particle caused by sticking force is improved, and the toner having the good flowability and the less change of the image quality which are the characteristic of the toner particle obtd. by the suspension polymerization is obtd.

    PRODUCTION OF FINE POLYMER PARTICLE HAVING UNIFORM PARTICLE DIAMETER
    144.
    发明专利
    PRODUCTION OF FINE POLYMER PARTICLE HAVING UNIFORM PARTICLE DIAMETER 失效

    公开(公告)号：JPS6481810A

    公开(公告)日：1989-03-28

    申请号：JP23838387

    申请日：1987-09-22

    Applicant: KAO CORP

    Inventor： YOSHIMATSU AKIRA ,  KONDO AKIHIRO ,  TSUSHIMA RIKIO

    IPC: C08F2/00 ,  C08F2/16 ,  C08F2/18 ,  C08F257/02 ,  C08F291/00

    Abstract: PURPOSE:To obtain the titled fine particles, having excellent sphericity and suitable as lubricants, fillers, etc., in high yield in a short time, by adding a specific nonionic organic compound to an oil-soluble ethylenically unsaturated monomer, absorbing the monomer on seed polymer particles and polymerizing the monomer. CONSTITUTION:An oil-soluble ethylenically unsaturated monomer is absorbed on seed polymer particles dispersed in an aqueous dispersion medium and polymerized in the presence of an oil-soluble polymerization initiator. In the process, (B) a nonionic organic compound (e.g. methanol) which is a liquid at ordinary temperature and compatible with (A) an oil-soluble ethylenically unsaturated monomer (e.g. styrene) and has >=0.01wt.% solubility in water at 25 deg.C in an amount of 0.5-300wt.%, preferably 2-200wt.% based on the monomer (A) is added thereto, then absorbed on (C) the seed polymer particles (preferably having preferably 0.1-20mu average particle diameter and

    PRODUCTION OF OLEFIN-MALEIC ANHYDRIDE COPOLYMER PARTICLE
    146.
    发明专利
    PRODUCTION OF OLEFIN-MALEIC ANHYDRIDE COPOLYMER PARTICLE 失效

    公开(公告)号：JPS63291905A

    公开(公告)日：1988-11-29

    申请号：JP12764187

    申请日：1987-05-25

    Applicant: KAO CORP

    Inventor： OTANI SHOJI ,  MUROI YOSHIYUKI ,  TSUSHIMA RIKIO

    IPC: C08F2/08 ,  C08F210/00 ,  C08F210/10 ,  C08F220/04 ,  C08F222/06

    Abstract: PURPOSE:To obtain spherical particles useful as an adhesive and a cement mixing agent, having a particle diameter distribution of monodisperse system in high yield and as primary particles, by copolymerizing an olefin with maleic anhydride in the presence of a specific dispersant. CONSTITUTION:In copolymerizing 2-8C olefin with maleic anhydride, radical polymerization is carried out in a solvent (e.g. acetone or methyl acetate) to dissolve the monomers but not the prepared copolymer in the presence of an oil-soluble cationic copolymer consisting of an ethylenic unsaturated monomer unit containing a cationic group shown by the formula [R1, R2 and R3 are 1-22C (substituted)alkyl and two of R1, R2 and R3 together with neighboring N may form ring structure; Y is halogen or acid residue] and a lipophilic ethylenic unsaturated monomer unit.

    BINDER FOR MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING MEDIUM
    150.
    发明专利
    BINDER FOR MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING MEDIUM 失效

    公开(公告)号：JPS6233331A

    公开(公告)日：1987-02-13

    申请号：JP17299385

    申请日：1985-08-06

    Applicant: KAO CORP

    Inventor： KANNEN NAOKI ,  TSUSHIMA RIKIO ,  YAMASHITA KAZUTAKA ,  OKADA TOMOYUKI

    IPC: G11B5/702 ,  B22F1/02 ,  C09D5/23 ,  C09D175/00 ,  C09D175/04 ,  G11B5/712 ,  H01F1/06

    Abstract: PURPOSE:To improve the dispersibility of magnetic powder, surface smoothness and durability by consisting a binder of a polyurethane resin produced by using a lactone-modified diol. CONSTITUTION:The binder for a magnetic recording medium consisting of the polyurethane resin formed by using the lactone-modified diol expressed by the formula is used. A magnetic layer constituted by dispersing ferromagnetic powder into such binder is proved on a non-magnetic substrate. The polyure thane resin may be either of the polyurethane resin of which both terminals of the molecule are an isocyanate group and the resin of which one terminal is the isocyanate group and the other terminal is a hydroxyl group. The average mol.wt. thereof is relatively preferably in a 1,000-100,000 range. The proportion of the binder and the pulverous ferromagnetic powder. The performance of both the dispersibility and durability is thereby extremely improved.

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