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 72, Issue 6
Displaying 1-7 of 7 articles from this issue
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  • Synthesis of Metal Octakis (alkoxymethyl) phthalocyanines and Their Redox Behavior
    Eiko OHNO-OKUMURA, Keiichi SAKAMOTO
    1999 Volume 72 Issue 6 Pages 345-354
    Published: June 20, 1999
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.72.345
    JOURNAL FREE ACCESS
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    Metal phthalocyanine derivatives have attractive major interest as functional substances. However, metal phthalocyanine derivatives have been utilized in only a few fields because of their lower solubility in common solvents. At present, syntheses of soluble metal phthalocyanine derivatives are required.
    Cobalt octakis (alkoxymethyl) phthalocyanines were synthesized as metal phthalocyanine derivatives having relatively shorter soluble alkoxy-substituents at the peripheral site on the phthalocyanine ring. Reduction and oxidation properties of cobalt (alkoxymethyl) phthalocyanines were estimated by the measurement of cyclic voltammograms.
    The cyclic voltammogram of cobalt octakis (hexoxymethyl) phthalocyanines showed four cathodic and three anodic peaks. Cobalt octakis (hexoxymethyl) phthalocyanine has two irreversible oxidation and two pairs of reduction potential.
    The reduction and oxidation of metal octakis (alkoxymethyl) phthalocyanines were due to the interaction between the phthalocyanine ring, which was influenced by the conjugated π electron current of the porphyrazine ring, and the central metal.
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  • Deterioration Evaluation of Organic Coated Steel under Different Environmental Conditions
    M. MONSADA Araceli, Yukihiro SEKIYAMA, Makoto YUASA, Isao SEKINE
    1999 Volume 72 Issue 6 Pages 355-364
    Published: June 20, 1999
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.72.355
    JOURNAL FREE ACCESS
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    The corrosion protective property given to coated steels by epoxy (EP) and alkyd resin (LAR) paints was evaluated by electrochemical measurements such as electrochemical impedance spectroscopy (EIS) and scanning vibrating electrode technique (SVET) under different environmental conditions. With respect to the organic coatings investigated in the study, the life of coating film (ts) immersed in a 3% NaCl solution was obtained from film resistance (Rf) measurements and the is values were observed in the order, 340 h for LAR (20μm) < 770 h for LAR (40μm) < 990 h for EP (20μm). The electric current density (i) obtained by SVET increased with increasing immersion time, and reached a constant value after 3 days. Such constant value was observed to be in good correlation with film resistance (Rf) obtained by EIS.
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  • Development of Coatings for Softwood
    Yasushi ANAZAWA, Tatsuya HIGASHI
    1999 Volume 72 Issue 6 Pages 365-372
    Published: June 20, 1999
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.72.365
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    For the development of coatings for softwood, reflection characteristics, pencil scratch resistance, and thermal characteristics of new coatings coated on softwood were examined. A polybutadiene clear coating containing 30vol% of polyurethane particles coated on softwood showed similar reflective distribution, thermal conductivity, and thermal diffusibility to uncoated softwood, with improved scratch resistance.
    From those results, we were able to develop a coating that protects the surface of softwood and retains the natural beauty and original texture of the inherent softwood.
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  • New functional Inorganic-Organic Hybrid Materials Prepared via Sol
    Gel Processes : Organically- Modified Ceramics
    Yoshiyuki SUGAHARA
    1999 Volume 72 Issue 6 Pages 373-381
    Published: June 20, 1999
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.72.373
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  • Photocatalytic Effect of Oxide Semiconductor and Application
    Tadanori SEI
    1999 Volume 72 Issue 6 Pages 382-387
    Published: June 20, 1999
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.72.382
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  • Multifunctional Materials : Activated Carbon Charcoal
    Ikuo ABE
    1999 Volume 72 Issue 6 Pages 388-396
    Published: June 20, 1999
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.72.388
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  • Color Toner
    Masayuki MARUTA
    1999 Volume 72 Issue 6 Pages 397-403
    Published: June 20, 1999
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.72.397
    JOURNAL FREE ACCESS
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