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 55, Issue 7
Displaying 1-5 of 5 articles from this issue
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  • Studies on Correlations between Adhesion Tension of Solvents to Pigments and Solubility Parameters
    Toshihide FUJITANI, Tadaaki SATOH
    1982 Volume 55 Issue 7 Pages 459-468
    Published: July 20, 1982
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.55.459
    JOURNAL FREE ACCESS
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    In order to clarify the details of interactions between pigments, resins and solvents, the correlations between adhesion tension of solvents to pigments and solubility parameters of solvents were examined. And then the studies of correlations between the finding and pigment stabilities in paints gave the results summarized below.
    1. A distinctive correlation was found to exist between hydrogen-bonding parameter (δn) of solvents and adhesion tensions of solvents to pigments. That is to say, the δn, of solvents giving the maximum adhesion tension varies with pigments, which were found to be divided into three groups.
    2. Pigments having a low level of adhesion tensions for solvents were difficult to disperse, sufficient pigment dispersion being unobtainable with any type of vehicles.
    3. Pigments which had a large adhesion tension value for solvents having a large δn were easily dispersed in a butylated melamine-formaldehyde vehicle, and pigments which had a large adhesion tension value for solvents having a small ah, were easily dispersed in maleic resin vehicle.
    Pigments which had a large adhesion tension value for solvents having a large and a small aft were easily dispersed in both resin vehicles.
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  • Adhesion of Thermosetting Acrylic Resin Paint Films
    Minoru TSUBOTA, Masao TAKIHARA, Kenji UEKI
    1982 Volume 55 Issue 7 Pages 469-474
    Published: July 20, 1982
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.55.469
    JOURNAL FREE ACCESS
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    The effects of resin composition, pigment volume concentration (PVC), catalyst and baking conditions on the mechanical properties and adhesion of thermosetting acrylic coatings were studied. The adhesive strength of the films based on acrylic prepolymer (hydroxyl type) and cross-linking agent of melamine resin was measured by the methods, Adherometer, ultrasonic wave method and cross-cut test. In order to analyze the results on adhesion stress-strain properties, dynamic viscoelastic properties and degree of swelling for the films were investigated. Main results were as follows : 1) The adhesive strength generally decreased with increasing hardness of the films with regard to chemical composition and the effects of catalyst. 2) Within the experimental measurements, a large difference was recognized for the adhesive strength on the steel plates directly and the primer of electrocoatings. 3) The adhesive strength-PVC curves were shown as the maximum point, and the adhesive strength for the films pigmented with titanium dioxide (TiO2) was larger than that for carbon black (CB) films. The interaction between pigment and vehicle for TiO2 films was larger than that for CB films. The strength of intercoat adhesion on the primer of electrocoatings increased by pigmentation.
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  • Usefulness of Viscoelastic Measurements in Evaluating Surface Coating Performance
    Osamu NAGURA
    1982 Volume 55 Issue 7 Pages 475-487
    Published: July 20, 1982
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.55.475
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  • The Cause and Phenomenon of Film Crack on Wood
    Jiro KAWAMURA
    1982 Volume 55 Issue 7 Pages 488-498
    Published: July 20, 1982
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.55.488
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  • Study on Curing Process of Coating Film by Dynamic Viscoelastic Measurement
    Takaharu IZUMO
    1982 Volume 55 Issue 7 Pages 499-508
    Published: July 20, 1982
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.55.499
    JOURNAL FREE ACCESS
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