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 68, Issue 7
Displaying 1-7 of 7 articles from this issue
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  • Studies on Photodegradation of Fluorocarbon Resin Paint Films by ESR Spectrometer (2)
    Takahiro TSUJITA, Teiichi SUZUKI, Chiaki SAGAWA, Shingo OKAMOTO
    1995 Volume 68 Issue 7 Pages 389-395
    Published: July 20, 1995
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.68.389
    JOURNAL FREE ACCESS
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    The photodegradation mechanism of thermosetting fluorocarbon paint films (poly [chlorotrifluoroethylene-co- (vinyl ether)]) was studied by using ESR (electron spin resonance) technique. Radical A has been detected in the paint films after UV irradiation at 77 K, and the presence of radical B has been presumed by a simulation.
    Radical A ;-CF2CFCH2CH (OR) CF2-
    Radical B ; CF2CFClCH2C (OR) CF2-
    In this paper, radical B was detected in the resin films under UV irradiation at 213 K. ESR of the radicals was measured at various irradiation times in the presence (in air) and in the absence (in vacuum) of oxygen. As a result, the ESR intensity of the radicals in air was always higher than that in vacuum at the corresponding temperature. It was considered that these radicals were converted to peroxide radicals in the presence of oxygen, and paint films were degraded by the attack of these active oxygen generated from peroxide.
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  • Synthesis of Bislactone Derivatives of Fluorans and Their Properties
    Hideo MITUSUI, Yukinori NAGAO, Yoshimoto ABE, Takahisa MISONO
    1995 Volume 68 Issue 7 Pages 396-403
    Published: July 20, 1995
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.68.396
    JOURNAL FREE ACCESS
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    The bislactone derivatives of fluorans having acetoxy, dimethylamino, and methoxy group were synthesized by the condensation of benzoylbenzoic acids with fluorans in acetic anhydride. The acetoxy derivatives of bislactone were hydrolyzed in 5 % sodium hydroxide to give hydroxy derivatives of bislactone. Trimethylsiloxy derivatives or benzoyloxy derivatives of bislactone were prepared by the reaction of the hydroxy derivatives with hexamethyldisilazane in THE or benzoyl chloride in pyridine. The visible absorption spectra of these bislactone derivatives in 1 N HC1-methanol (1 : 1) or O. 1 N NaOH-methanol (1 : 1) were investigated. The λmax of bislactone derivatives in acid was almost the same with that of starting material of fluoran. But the λmax of bislactone derivatives in base was shifted. The coloring mechanism of these derivatives were discussed from the visible absorption spectra.
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  • A Study on Surface Modification of Stainless Steels (I)
    Improvement of strength of epoxide resin/stainless steel structual joints by electrolytic polymerization treatment with 1, 3, 5-triazine-2, 4, 6-trithiol monosodium salt.
    Hidetoshi YAMABE, Hidetoshi HIRAHARA, Kunio MORI
    1995 Volume 68 Issue 7 Pages 404-410
    Published: July 20, 1995
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.68.404
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    The surface treatment of stainless steels by electrolytic polymerization with 1, 3, 5-triazine-2, 4, 6-trithiol monosodium salt (TTN) in aqueous solution was investigated. This surface treatment improved the adhesion durability of epoxide resin adhesive joints in wet environment.
    Three types of surface-analysis techniques were employed in an attempt to ascertain the bonding mechanism with this surface treatment. XPS and static SIMS results gave a strong evidence of covalent-bonding formation between sulfur atom of the TTN and metal atom of stainless steels. The formation of covalent bonding at the adhesive interface plays an important role in th e improvement of the adhesion durability, because it would be unlikely that water would readily displace such a strong interaction.
    A model for the positive effect of the electrolytic polymerized TTN on the adhesion durability of stainless steels to epoxide resins was proposed.
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  • Novel Colored Luster Pigments
    their Production, Properties and Application
    NORBERT MRONGA, VOLKER RADTKE, BRUNO BAUMANN, Yasumasa MATSUMOTO
    1995 Volume 68 Issue 7 Pages 411-423
    Published: July 20, 1995
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.68.411
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  • Mechanism of Adhesion of Organic Compounds to Metal Surfaces
    Makoto NAKAZAWA
    1995 Volume 68 Issue 7 Pages 424-433
    Published: July 20, 1995
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.68.424
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  • Introduction to Understand Physical Properties of Coatings (V) Viscoelastic Properties of Paint Films (2)
    Keigo KINOSHITA, Minoru TSUBOTA, Katsura NAGANUMA
    1995 Volume 68 Issue 7 Pages 434-444
    Published: July 20, 1995
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.68.434
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  • Chemical Conversion Coating
    Tamotsu SOBATA
    1995 Volume 68 Issue 7 Pages 445-451
    Published: July 20, 1995
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.68.445
    JOURNAL FREE ACCESS
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