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 56, Issue 3
Displaying 1-6 of 6 articles from this issue
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  • Curing Process of Two Component Polyurethane Coatings and Physical Properties of Their Cured Films
    Minoru TSUBOTA, Hisakazu TOMITA, Shogo HONDA, Kenji UEKI
    1983 Volume 56 Issue 3 Pages 135-141
    Published: March 20, 1983
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.56.135
    JOURNAL FREE ACCESS
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    The influence of curing conditions, particularly humidity on chemical and physical structures and mechanical properties of cured films was studied. The samples used were based on various acrylic polyols and isocyanate prepolymer (HMDI-biuret adduct). Curing behavior under differed temperature and humidity was followed by the measurements of IR spectrums, drying time and stress-strain properties of paint films. Dynamic viscoelasticity, degree of swelling and observation of fracture surface by scanning electron microscope for cured films were investigated. Main results were as follows : 1) The concentration of urethane groups in the films cured at low humidity (I : RH 0%) was about 4-5 times that in the films cured at high humidity (II : RH 95-97%), and about 80% of -NCO was converted into urea groups in II films from IR spectroscopic examination. While the modulus of II films was larger than that of I films in the beginning of curing reaction, its value of I films grew larger than that of II films at throughly cured state. 2) Physical properties of their cured films were affected remarkably by the difference of humidity, and they closely related to chemical structure determined by urethane and urea concentration, that is, I films were tough due to urethane linkage, whereas II films mainly crosslinked with isocyanate prepolymer by urea linkage were porous and brittle.
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  • Syntheses and Properties of Metal Chelates of Group IV Element with the Ligand of Azo Compounds
    Synthesis of Silicon Chelates and their Properties as a Coloring Material
    Takahisa MISONO, Yoshimoto ABE, Yukinori NAGAO, Kazunori NIGORIKAWA
    1983 Volume 56 Issue 3 Pages 143-149
    Published: March 20, 1983
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.56.143
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    Silicon-containing Chelates with ligand of 2, 2′-dihydroxy azo compounds were synthesized, and their properties were investigated. The 1 : 2 silicon chelates with no charge were synthesized by the reaction of silicon tetrachloride with disodium salts of 2, 2′-dihydroxy azo compounds. The chelates were reddish violet or blue powders insoluble or sparingly soluble in water and organic solvents. The coloring test for polystyrene revealed that these chelates gave a colored plastics of red with a good transparency through an excellent dispersion and showed a high thermal stability and lightfastness as was the same on a test with a sample pastel colored by titanium dioxide. The effect of the ligand on thermal stability and lightfastness of these chelates was also investigated by means of thermal analysis and mass spectrometry.
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  • Weathering Tests of Precoated Metals in The Antarctic
    Kiyoshi HIKITA, Shingo OKAMOTO, Shinichi KATAOKA
    1983 Volume 56 Issue 3 Pages 150-158
    Published: March 20, 1983
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.56.150
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  • Compatibility and Adhesion
    Kozo SATO
    1983 Volume 56 Issue 3 Pages 159-170
    Published: March 20, 1983
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.56.159
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  • Pigments for Inks
    Michichika HIKOSAKA, Soichi OSHIMA
    1983 Volume 56 Issue 3 Pages 171-181
    Published: March 20, 1983
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.56.171
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  • The Evaluation of the Surface Area and the Porosity on Solid- (I)
    Shigeji HAGIWARA, Hiroshi TAKAHASHI
    1983 Volume 56 Issue 3 Pages 182-197
    Published: March 20, 1983
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.56.182
    JOURNAL FREE ACCESS
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