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 67, Issue 10
Displaying 1-7 of 7 articles from this issue
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  • Synthetic Process and Thermal Behavior of Nickel Hydrogenphosphate Hydrate Prepared by a Wet Chemical Method
    Kazuaki HASHIMOTO, Yoshitomo TODA, Koji MIURA, Koshiro HASHIMOTO
    1994 Volume 67 Issue 10 Pages 614-623
    Published: October 20, 1994
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.67.614
    JOURNAL FREE ACCESS
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    Some nickel hydrogenphosphate hydrates were synthesized by the a wet chemical method of NiCO3 2 Ni (OH) 2 (BNC) -H3PO4-H2O system at 96°C, and their thermal changes were also investigated.
    The synthetic process of nickel hydrogenphosphate hydrates was dependent on R (H3PO4/NiO ; molar ratio) and quantity of BNC. In case of BNC=37.6g, R=3 to 4, the initial product of the reaction was amorphous precipitate (NiHPO4·nH2O (n=3)) at the first hour within an hour, and then it was converted to Ni3 (PO4) 2.8 H2O in 3 hours. When R=5 to 6, the amorphous precipitate was converted to NiHPO4.3/2 H2O in 5 hours. When BNC=75.2g and R=5 to 7, the amorphous precipitate changed to NiHPO4.3 H2O in 3 hours.
    Their thermal changes were chemically formulated as follows;
    NiHPO4·3/2 H2O300°C→Amorphous phase685°C→β-Ni2P2O7565°C→α-Ni2P2O7
    NiHPO4·3 H2O60°C→NiHPO4·3/2 H2O294°C→Amorphous phase724°C→Ni2P2O7565°C→α-Ni2P2O7
    Ni3 (PO4) 2·8 H2O224°C→Amorphous phase 797°C→Ni3 (PO4) 2
    The color of Ni2P2O7 obtained by the dehydration was light yellow, which is sufficiently applicable as a new inorganic pigment that can substitute for cadmium yellow.
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  • Preparation of Microcapsule Toner and Their Properties
    Masato TANAKA, Isao KIMURA, Natsukaze SAITO, Hideaki TOMINAGA
    1994 Volume 67 Issue 10 Pages 624-631
    Published: October 20, 1994
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.67.624
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    Microcapsule toners were prepared in two steps : fine core particles and the wall of the capsule were prepared in the first and the second steps, respectively. The core material was stearic acid in which carbon black was dispersed. The wall material was the fine polystyrene beads prepared by the soapfree polymerization.
    In the experiment, operating conditions, such as the volume fraction of stearic acid and the impeller speed and the mixing time in the preparation of the first O/W dispersion, were changed stepwise.
    It was investigated that how the operating conditions affected the properties of microcapsule toners, such as the size distribution, the mean size and the contents of ferrite powder and the wall material.
    The mean size of the toner decreased with the increase of the impeller speed and the mixing time (DAV-N-1.2r1, DAV-t1-0.48). The content of the wall material increased with the polymerization time.
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  • Influence of Particle Size of Titanium Dioxide on the Flip-Flop Effect
    Masashi SAKAMOTO, Haruo OKUDA, Hideo FUTAMATA, Masakazu HATTORI
    1994 Volume 67 Issue 10 Pages 632-640
    Published: October 20, 1994
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.67.632
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    The influence of the particle size of TiO20n the flip-flop effect in metallic paints was investigated by the measurement of the color of metallic paint films containing TiO2with gonio-photospectrometer. Hue changes (Δb*, Δα*) that were found to be more important and dominant factor for the flip-flop effect than lightness changes (ΔY) depended on the primary particle size and the degree of dispersion. The spectral reflectance at 50 and 700 nm of TiO2enamel paint films without aluminium flake gave a good correlation to the flip-flop effect, especially hue changes (Δb*).
    [Δb*cc (eR450/100-eR700/100)]
    The magnitude of the flip-flop effect of metallic paint fllm was predictable from the spectralreflectance of TiO2enamel paint films.
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  • Quantum Chemical Approach to Metal-polymer Interfaces
    Shigeyoshi MAEDA
    1994 Volume 67 Issue 10 Pages 641-652
    Published: October 20, 1994
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.67.641
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  • The Trend of Development on Water-borne Coatings
    Can and Automotive Coatings
    Yuzo TAKAHASHI
    1994 Volume 67 Issue 10 Pages 653-658
    Published: October 20, 1994
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.67.653
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  • Development Trends of Coated Steel Sheets for Anticorrosion
    Toshiaki SHIOTA
    1994 Volume 67 Issue 10 Pages 659-665
    Published: October 20, 1994
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.67.659
    JOURNAL FREE ACCESS
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  • Catalytic Activity
    Hiroshi FUKUI
    1994 Volume 67 Issue 10 Pages 666-674
    Published: October 20, 1994
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.67.666
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