Journal of the Japan Society of Colour Material
Online ISSN : 1883-2199
Print ISSN : 0010-180X
ISSN-L : 0010-180X
Volume 59, Issue 3
Displaying 1-7 of 7 articles from this issue
  • Viscosity Dependence of Propagation Characteristics
    Seiji USHIAMA, Tadahiro KAMIMURA, Kohji TODA
    1986 Volume 59 Issue 3 Pages 139-145
    Published: March 20, 1986
    Released on J-STAGE: November 20, 2012
    JOURNAL FREE ACCESS
    The sound propagation characteristics in an amorphous ribbon magnetostrictive delay line coated with a viscous liquid are described. The change of the phase difference between the output and the input electrical signal, corresponding to the delay time, and the insertion loss of the delay device are given as functions of viscosity and thickness. The phase difference deviation increases gradually with the increase of viscosity, and then reaches a constant value independent of the viscosity, of which the value is proportional to the thickness of the viscous liquid. The insertion loss takes a peak value dependent linearly on the thickness of the coated material. These propagation characteristics are useful to evaluate the paint film formation process.
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  • Change in viscoelastic property during alkyd formation
    Hatsuzo MASUDA, Ichiro ANAZAWA
    1986 Volume 59 Issue 3 Pages 146-149
    Published: March 20, 1986
    Released on J-STAGE: November 20, 2012
    JOURNAL FREE ACCESS
    Sample of alkyd resin was taken during its resinification, and from it, melamine-alkyd resin film was produced and reviewed in its viscoelastic property effect.
    From logarithmic decrement, an effect of the molecular weight increment revealed with lapse of reaction time, transition temperature shifted to high temperature side, and maximum of logarithmic decrement became high. By decrement in residual active group, bonding effect to melamine resin became small. This trend was also seen in coefficient of viscosity.
    From shear modulus, the authors recognized that the cross linking effect of melamine-alkyd revealed at high temperature elastic part and that the cross linking degree became large as the reaction time is shorter.
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  • Effect of benzoic acid and pentaerythritol in alkyd resin
    Hatsuzo MASUDA, Ichiro ANAZAWA
    1986 Volume 59 Issue 3 Pages 150-154
    Published: March 20, 1986
    Released on J-STAGE: November 20, 2012
    JOURNAL FREE ACCESS
    The components of alkyd resin are substituted by aliphatic acid and benzoic acid, and pentaerythritol by glycerol. The authors reviewed the viscoelastic effect of these materials upon amino-alkyd resin paint film. As the contents of benzoic acid became large, transition point shifted to high temperature side. The maximum of logarithmic decrement revealed an inverse relation to the acid value.
    In a system whose pentaerythriol is substituted by glycerol, secondary transition temperature and maximum of logarithmic decremenet were shifted to the lower temperature side as the quantity of glycerol became large.
    Modulus of rigidity was recognized to become lower at the high temperature elastic part when pentaerythritol is replaced by glycerol.
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  • Tartrazine Lakes from Commercial Origins
    Yasushi KUBO, Makoto SHIRAI, Yoshifumi MAKITA
    1986 Volume 59 Issue 3 Pages 155-161
    Published: March 20, 1986
    Released on J-STAGE: November 20, 2012
    JOURNAL FREE ACCESS
    Dye elution in NaCl aqueous solution was examined for Tartrazine aluminum lakes from various commercial origins. The concentration of eluted dye anion [D]s was measured as a function of the lake/solution ratio Wp and time, which gave a set of elution curves marked by the following features : (1) [D]s increased keeping up with Wp and (2) [D]s depended on time in two different ways by lakes of different origins : for one way, [D]s increased consistently with elapse of time, and for the other, [D]s increased in the initial stage and then turned to decrease giving a maximum. This fact indicated that contradictory results might be obtained in grading the anti-eluting strength of lakes, based on the usually-adopted method when [D]s is measured at a fixed condition with respect to Wp and time, if the condition is changed to any different level.
    The observed dye elution features were interpreted by a mechanism where the anion exchange reaction between Cl- ions in the NaCl solution and dye anions in the lake was supposed to proceed in the peripheral reacting zone of lake particle with the depth of 40 A or so, while the central core with the diameter of 1500 A or so remained unaffected. Linear relationships demanded by the mechanism between 1/[D]s and 1/Wp introduced two kinds of values that should be related to the distribution coefficient K of the dye anion and the weight fraction η of the peripheral reacting zone for the whole particle, respectively. These values proposed a method to compare the anti-eluting strength of aluminum lakes.
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  • Ryuitiro SUGISITA
    1986 Volume 59 Issue 3 Pages 162-167
    Published: March 20, 1986
    Released on J-STAGE: November 20, 2012
    JOURNAL FREE ACCESS
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  • Akira TAKAHASHI
    1986 Volume 59 Issue 3 Pages 168-175
    Published: March 20, 1986
    Released on J-STAGE: November 20, 2012
    JOURNAL FREE ACCESS
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  • Hiroshi YOSHIOKA
    1986 Volume 59 Issue 3 Pages 176-184
    Published: March 20, 1986
    Released on J-STAGE: November 20, 2012
    JOURNAL FREE ACCESS
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