Journal of the Japan Society of Colour Material
Online ISSN : 1883-2199
Print ISSN : 0010-180X
ISSN-L : 0010-180X
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Volume 57, Issue 7
Displaying 1-6 of 6 articles from this issue
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  • Studies on Surface Modifications of Inorganic Fillers Using Titanate Coupling Agents. I.
    Evaluations of titanate coupling agents based on wettabilities
    Eigo TSUCHIYA, Masahiro TAKEHARA
    1984Volume 57Issue 7 Pages 363-372
    Published: July 20, 1984
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.57.363
    JOURNAL FREE ACCESS
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    Inorganic fillers such as calcium carbonate, silica and talc were treated with isopropyl triisostearoyl titanate (TC-1), tetraoctyl-bis (ditridecylphosphite) titanate (TC-2) and bis (dioctylpyrophosphate) oxacetate titanate (TC-3). Surface wettabilities of these powders by water, toluene and liquid paraffin were evaluated by contact angles measured by a tablet method and a penetration rate method. Furthermore, dispersibilities and viscosities of suspensions were also measured. The results show that both TC-1 and TC-2 made fillers' surface hydrophobic, but the effect of TC-2 was influenced by the surface shapes of fillers. Beside, TC-3 showed a tendency to make them hydrophilic. From these results, it was found that these surface modification effects were dependent on the molecular structures of the coupling agents used.
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  • Preparation of Magnetic Polymethyl Methacrylate Microspheres and their Application
    Atsushi SUZUKI, Yasuhiro FUJII, Kijiro KON-NO, Ayao KITAHARA
    1984Volume 57Issue 7 Pages 373-379
    Published: July 20, 1984
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.57.373
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    Using copolymer of lauryl methacrylate and glycidyl methacrylate as a dispersant, the magnetic polymethyl methacrylate microspheres (MMS) were prepared with change of concentration of dispersant and magnetite particles in cyclohexane. The glycidyl group of the dispersant was bonded chemically to the surface moiety of MMS. The magnetite particles were fully adsorbed by methacrylic acid monomer after the treatment with Aerosol OT. Polydisperse MMS were obtained and their particle size distributions changed with both the concentrations of the dispersant and magnetite particles. MMS were not covered perfectly with the polymer, but the content of the MMS in total microspheres formed was more than 95%. On the other hand, it was apparent that the MMS are a good removal agent for mineral oil in water or water containing a trace of a surfactant from the experiment of oil removal.
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  • Preparation of Magnetite Superfine Sol in W/O Microemulsion and its Properties
    Masao GOBE, Kazuhiko KANDORI, Kijiro KON-NO, Ayao KITAHARA
    1984Volume 57Issue 7 Pages 380-385
    Published: July 20, 1984
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.57.380
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    W/O microemulsions consisting of Aerosol OT (AOT) or polyoxyethylene (6) nonylphenyl ether (NP-6) /water/cyclohexane or isooctane were utilized to prepare Fe3O4 sols. Two methods were carried out for the preparation. One procedure was addition of aqueous FeCl2 solution to the mixture of two kinds of AOT/H2O/isooctane microemulsions solubilizing aqueous FeCl3 and aqueous NH3. An alternative one was to add the NP-6/aqueous FeCl2 solution/cyclohexane microemulsion in AOT cyclohexane solubilizing FeCl3 and NH3 solutions.
    The monodisperse magnetite sols having superfine particles of 30-50 ÅA in diameter were obtained. It was apparent that the sols show superparamagnetic behavior from the temperature dependence of Mössbauer spectra. The sols were also stable for long time. The remarkable stability was explained from the entropic repulsion energy of alkyl groups of surfactant molecules adsorbed on the sol particles.
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  • Preparation of Ultra Fine Particles in Gas Atmoshere
    Seiichiro KASHU
    1984Volume 57Issue 7 Pages 386-393
    Published: July 20, 1984
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.57.386
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  • Preparation of Ultrafine Powders from Liquid Phase
    Seisirô ITÔ
    1984Volume 57Issue 7 Pages 394-402
    Published: July 20, 1984
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.57.394
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  • Preparation of Ultrafine Powders by Hydrothermal Reactions
    Shigeyuki SOMIYA
    1984Volume 57Issue 7 Pages 403-408
    Published: July 20, 1984
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.57.403
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