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 59, Issue 9
Displaying 1-7 of 7 articles from this issue
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  • Studies on Phthalocyanine Type Compounds II
    Reaction of Copper Dibenzodipyridinoporphyrazine with Diethylsulfate
    Keiichi SAKAMOTO, Fukumatsu SHIBAMIYA
    1986 Volume 59 Issue 9 Pages 517-524
    Published: September 20, 1986
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.59.517
    JOURNAL FREE ACCESS
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    Reaction products were obtained by the reaction with one of the copper phthalocyanine nitrogen isologues i. e., copper dibenzodipyridinoporphyrazine and its fractions (Cu-2P) and one of the quaternizing agents i. e., diethylsulfate, according to the U. S. patent. These products have lower solubility in water than other products used the other quaternizing agents. In consequence of measurement of infrared spectra and nuclear magnetic resonance spectra, the reaction products were not quaternary Cu-2 P but sulfonated ones which were considered that the synthesis is difficult in this field.
    Examining reaction mechanisum, it was considered that the sulfonation of Cu-2P was not aroma-tic electrophilic substitution because reaction products were obtained under gentle condition about 100°C.
    Therefore, the authors concluded that the sulfonation was aromatic nucleophilic substitution, be-cause the reaction took place in spite of the presence of the formic acid solvent.
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  • Corrosion Protective Properties of Various Ferrite Paint Films
    Isao SEKINE, Takeshi KATO, Hideaki SUDA
    1986 Volume 59 Issue 9 Pages 525-529
    Published: September 20, 1986
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.59.525
    JOURNAL FREE ACCESS
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    The corrosion protective properties of various ferrite pigments with the epoxy resin (ER) and linseed oil (LO) were investigated by the electrochemical measurements and weight loss test. The corrosion protective property of the linseed oil-ferrite paints was found to show better than that of the epoxy resin-ferrite paints, since some of them showed the small value of tan δ (about 0.5) and the comparative large value of resistance of paint film (Rp) and of corrosion reaction (Rθ). Especially, the corrosion protective property of Ca ferrite showed the large difference between each system of the epoxy resin and linseed oil. Mg and Fe ferrites showed the good corrosion protective property in both epoxy resin and linseed oil systems. There was seen the mutual relationship between the values of tan δ, Rp, and Ro of coated steel and those of weight loss and polarization curve in extracted solution. It was supposed that the corrosion protective effect of ferrite pigments was dependent on their basicity in the epoxy resin system, and on the inhibitive action of decomposition components of paint film based on their basic property in the linseed oil system, respectively.
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  • Rheological Studies on Curing Behavior of UV inks (I)
    Viscosity Measurements by an Oscillating Plate Rheometer
    Koichiro WATANABE, Takeshi AMARI, Yasufumi OTSUBO
    1986 Volume 59 Issue 9 Pages 530-535
    Published: September 20, 1986
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.59.530
    JOURNAL FREE ACCESS
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    The dynamic viscosity of UV inks during curing was measured at various film thicknesses by the use of an oscillating plate rheometer. The exposure-dependent curve of dynamic viscosity is approximated by two straight lines. A useful concept in discussing the curability is the minimum exposure energy defined as the exposure energy at the intersection of two lines. The minimum exposure energy exponentially increases with film thickness ; this resulting from an exponential decay of light intensity with depth in the ink film. The vehicle shows the fastest cure rate at a given thickness, followed by magenta, yellow, cyan inks in the order. The differences in cure rate are attributed to different absorbances of pigments. Since the absorption by pigments is very large in UV inks and not involved in photochemical reaction, the film thickness to be effectively cured is drastically affected by the absorbance of pigment. The oscillating plate rheometer provides a useful tool for evaluation of curability of UV inks.
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  • Current Topics in the Field of Microcapsules
    Tamotsu KONDO
    1986 Volume 59 Issue 9 Pages 536-542
    Published: September 20, 1986
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.59.536
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  • Inorganic Microcapsules of Pigments
    Yoshiko NAKAHARA
    1986 Volume 59 Issue 9 Pages 543-551
    Published: September 20, 1986
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.59.543
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  • Microcapsules by in situ Polymerization Method and Their Applications
    Sueo KIDA
    1986 Volume 59 Issue 9 Pages 552-556
    Published: September 20, 1986
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.59.552
    JOURNAL FREE ACCESS
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  • Control of Friction and Wear
    Lubricate Paint·Nonsliping Paint
    Masao KATAYAMA
    1986 Volume 59 Issue 9 Pages 557-566
    Published: September 20, 1986
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.59.557
    JOURNAL FREE ACCESS
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