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 43, Issue 10
Displaying 1-5 of 5 articles from this issue
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  • Studies on the s-Triazine Coating Resins. V.
    Preparation of Butylated Guanamine Coating Resins and Their Properties
    Noriyuki MIYAUCHI, Toshio TAKESHITA
    1970 Volume 43 Issue 10 Pages 475-486
    Published: October 30, 1970
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.43.475
    JOURNAL FREE ACCESS
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    The purpose of this paper is to investigate correlations of the composition of butylated guanamine coating resins with their preparation conditions and properties, in addition, to gain a knowledge about the mechanism of the reaction when they are baked.
    Guanamines used in this study are benzoguanamine (BG) and acetoguanamine (AG).
    The preparation of resins, determination of their composition and methods of investigation of their hardening were the same as reported in the previous paper.
    A summary of the results is shown below.
    (1) When the molar ratio of HCHO to BG increased higher than 4, variation of composition was little, and degree of condensation increased with a decrease of the molar ratio of n-C4H9OH to BG.
    (2) Fo.r mineral spirit tolerance (MST) the same measure as we used for butylated melamine (M) resins was applicable to BG resins, that is, butoxy group had a positive effect for MST of the resin solution (in n-C4H9OH), while free hydroxymethyl and imino groups had rather a negative effect, the former being more effective of the two.
    (3) The stability of guanamine-alkyd resin solution estimated by the viscosity rising was not so markedly influenced according to the difference of the composition of guanamine resins, and generally more stable than M resins.
    (4) It was apparently recognized that in the baking of BG resins at 130-170°C, the isolation of n-C4H9OH as well as HCHO occurred.
    It was estimated that free hydroxymethyl group played a major role in the hardening of BG resins and reacted with other hydroxymethyl, imino and butoxy groups.
    -N-CH20H+-CH2OH→-N-CH2-+ CH20+ H20
    -N-CH20H+-H-H→-N-CH2-N-+ H20
    -N-CH2OH +-N-CH20C4H9→-N-CH2-N-+C4H90H+ H2O
    (5) In the case of guanamine resin alone, hardness of the film obtained was affected by hydroxy-methyl and butoxy groups, whereas in the case of guanamine-alkyd resins such a difference of hardness was small.
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  • Studies on the s-Triazine Coating Resins. VI.
    Preparation of Butylated N-Substituted Melamine Coating Resins and Their Properties
    Noriyuki MIYAUCHI, Toshio TAKESHITA
    1970 Volume 43 Issue 10 Pages 487-493
    Published: October 30, 1970
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.43.487
    JOURNAL FREE ACCESS
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    Correlations of the composition of butylated N-substituted melamine coating resins with their preparation conditions and properties are described.
    N-substituted melamines used in this study were N-phenylmelamine (PM) and N-butylmelamine (BM).
    The preparation of resins, determination of their composition and methods of investigation of their properties were the same as reported in the previous paper.
    A summary of the results is shown below.
    1. Combined n-butoxy group increased with an increase of the molar ratio of HCHO and n-C4H90H to PM.
    2. For mineral spirit tolerance, the same measure as we used for butylated melamine (M) resins and benzoguanamine (BG) resins was applicable to PM resins.
    3. The stability of PM-alkyd resin solution estimated by the viscosity rising was similar to that of BG resins, while in the case of BM resins that was rather close to M resins.
    4. In the case of N-substituted melamine resin alone, hardness of the film obtained was affected by hydroxymethyl and butoxy groups, whereas in the case of mixing with alkyd resin such a difference of hardness was small.
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  • Introduction to Electric Phenomena at Intevfaces applied to Coloy Materiae Industry
    Ayao KITAHARA
    1970 Volume 43 Issue 10 Pages 494-499
    Published: October 30, 1970
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.43.494
    JOURNAL FREE ACCESS
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  • The Measurement of Interfacial Potential in Aqueous Dispersed Systems
    Akira WATANABE
    1970 Volume 43 Issue 10 Pages 500-509
    Published: October 30, 1970
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.43.500
    JOURNAL FREE ACCESS
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  • Measurements of Electrokinetic Potential in Non-aqueous Media
    Isao TARI
    1970 Volume 43 Issue 10 Pages 510-517
    Published: October 30, 1970
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.43.510
    JOURNAL FREE ACCESS
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