Journal of the Japan Society of Colour Material
Online ISSN : 1883-2199
Print ISSN : 0010-180X
ISSN-L : 0010-180X
Volume 44 , Issue 9
Showing 1-6 articles out of 6 articles from the selected issue
  • Hiroshi UTSUGI, Sigeoki NISHIMURA, Jiro TAKAHIRA, Moritaka KATO, Makot ...
    1971 Volume 44 Issue 9 Pages 401-408
    Published: September 30, 1971
    Released: November 20, 2012
    JOURNALS FREE ACCESS
    Lyophilic zinc powder has been prepared by reacting the zinc powder with n-butanol under the conditions of the high temperature and high pressure. By means of the microanalysis of the surface-treated zinc powder, observation through the electron microscope and dissolution into dil. HCl and also the fact that the surface-treated sample cannot be suspended into water, but into organic solvent, it was found that the only surface property of the powder was changed into the lyophilic, accompanying with no change of any fundamental property of the powder, e. g., surface area, pore structure or any chemical properties. This surface-treatment on the zinc powder was interpreted as the esterification of the acidic group of the surface oxide of the zinc powder with n-butanol. The zinc-rich paint from the surface-treated zinc powder shows the well-dispersed one into vehicle than from the untreated native zinc powder, whilst, the dry film of the paint prepared from the surface-treated zinc powder shows the easily breakable one than from the untreated native ones.
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  • Kenji SATO
    1971 Volume 44 Issue 9 Pages 409-417
    Published: September 30, 1971
    Released: November 20, 2012
    JOURNALS FREE ACCESS
    With regard to the methylated methylolmelamine produced by the reaction of methylolmelamine having different methylolation degree (tri-, tetra-, and hexa-methylolmelamine) with methanol catalyzed by an acid, the analyses of the functional groups, the solubility into various solvents, and the thermal property were investigated ; then its reaction mechanism was proposed.
    Next, the water soluble alkyd resin paint by the use of the methylated methylolmelamine as a cross-linking agent was investigated. As a main result, it was found that the increase of the viscosity decreases markebly, and the storage stability increases remarkably with increasing methylolation degree ; moreover, the effect of the solvents upon the increase of the viscosity, and the effect of the methylolation degree upon the hardness and flexibility after baking were tested.
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  • Tamotsu WATANABE
    1971 Volume 44 Issue 9 Pages 418-423
    Published: September 30, 1971
    Released: November 20, 2012
    JOURNALS FREE ACCESS
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  • Chin-Chuan HUANG
    1971 Volume 44 Issue 9 Pages 424-430
    Published: September 30, 1971
    Released: November 20, 2012
    JOURNALS FREE ACCESS
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  • Morio NINOMIYA
    1971 Volume 44 Issue 9 Pages 431-436
    Published: September 30, 1971
    Released: November 20, 2012
    JOURNALS FREE ACCESS
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  • Hiroshi KOKADO
    1971 Volume 44 Issue 9 Pages 437-442
    Published: September 30, 1971
    Released: November 20, 2012
    JOURNALS FREE ACCESS
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