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 4
Displaying 1-5 of 5 articles from this issue
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  • Study on the Method of Predicting Service Life of Coated Steel Sheets (IX)
    Preparing the Map on Predicting the Service Life of Polyvinyl Chloride Resin Coated Galvanized Steel Sheet
    Eiki TAKESHIMA, Toshinori KAWANO, Hisao TAKAMURA, Hisamitsu MIZUKI
    1984 Volume 57 Issue 4 Pages 174-185
    Published: April 20, 1984
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.57.174
    JOURNAL FREE ACCESS
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    The deterioration of a polyvinyl chloride resin coated steel sheet subjected to an 8-year outdoor -weathering test in five areas was examined in respect of the appearance, chemical and physical changes of the film and the change in adhesive strength. At the same time, the correlations between the change of the material properties and the effects of the deterioration factors were studied. The results are :
    (1) The deterioration of the polyvinyl chloride resin coated steel sheet considerably depends on the coating color and the place of the outdoor weathering test. A coating color with poor weatherability varies more in deterioration in different places of the outdoor weathering test.
    (2) There is a correlation between the decrease in the amount of extender pigment (CaCO3) in the film and such appearance changes as the film cracking, reduction in gloss or discoloring. The change of the amount of extender pigment is effectively reduced by increasing the mixing amount of the titanium dioxide pigment in the film.
    (3) The reaction in which polyvinyl chloride resin is decomposed to generate crosslinking materials or low molecular weight compounds varies with the mixing amount of titanium dioxide pigment. This is probably due to the photochemistry of titanium dioxide pigment against the polyvinyl chloride resin.
    From the results of analysis thus obtained, it is possible to prepare a map for service life evaluation of polyvinyl chloride resin coated steel sheets. This map shows that the deterioration is promoted most conspicuously at the Pacific Ocean coasts in western Japan. As far as the blue-colored film is concerned, it has been found that deterioration is accelerated about 1. 65 times more intensely in Amagasaki where the deterioration factors are severe than in Obihiro where the deterioration factors are gentle.
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  • Syntheses and Properties of Metal Chelates of the Group IV Elements with the Ligands of Azo Compounds
    Syntheses and Properties of Titanium, Zirconium and Silicon Chelates with the Ligands of Azo Compounds Containing Electron Withdrawing Substituents
    Takahisa MISONO, Katsuhiko SAWAMURA, Yukinori NAGAO, Yoshimoto ABE
    1984 Volume 57 Issue 4 Pages 186-192
    Published: April 20, 1984
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.57.186
    JOURNAL FREE ACCESS
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    In order to obtain metal chelates of the group IV elements with the ligands of azo compounds and to investigate their properties as a pigment, titanium, zirconium and silicon chelates with the ligands of 2, 2′-dihydroxy azo compounds containing the electron withdrawing substituents such as chloro and nitro group were synthesized. The reaction of metal tetraalkoxide or silicon tetrachloride with the ligands gave the 1 : 2 chelates of metal to the ligand. Titanium, zirconium and silicon chelates were black, reddish brown and dark brown powder solids, respectively. Thermal stability and lightfastness of these chelates were compared with those of chelates containing the ligands without substituent and with electron donating substituent. The introduction of electron withdrawing group into the ligand increased lightfastness of these chelates and thermal stability of titanium and zirconium chelates. The properties of these chelates as a coloring material for the polystyrene resin were also investigated.
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  • Analysis of Coating Films for Metal by XMA
    Shunzo MIYAZAKI
    1984 Volume 57 Issue 4 Pages 193-199
    Published: April 20, 1984
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.57.193
    JOURNAL FREE ACCESS
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  • Analysis of Polymer Surface by ATR Infrared Spectroscopy
    Masayoshi ITO
    1984 Volume 57 Issue 4 Pages 200-205
    Published: April 20, 1984
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.57.200
    JOURNAL FREE ACCESS
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  • Paint Film Surface Analysis by X-ray Photoelectron Spectroscopy
    Noboru SATOH
    1984 Volume 57 Issue 4 Pages 206-211
    Published: April 20, 1984
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.57.206
    JOURNAL FREE ACCESS
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