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 54, Issue 11
Displaying 1-6 of 6 articles from this issue
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  • Synthesis of Water-soluble Polyurethane Resin and Application to Electrical Insulating Enameled Wire
    Toshiyuki TANAKA, Tokuyuki KURODA, Masahiko YASUDA, Yorozu YOKOMORI
    1981 Volume 54 Issue 11 Pages 659-670
    Published: November 20, 1981
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.54.659
    JOURNAL FREE ACCESS
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    The syntheses of water-soluble polyurethane (PU) resins and the application to the enameled film on electrical insulating wire were studied.
    PU varnishes for the enameled copper wire are used in the solvent-soluble type to satisfy the hard electrical properties, and it is desired to manufacture the good water-soluble PU resin by reason of offensive odor, toxicity, pollution and resource saving accompanied with the usage of solvent, e. g. cresol etc.
    Generally, for the synthesis of water-soluble resin, it is usual to make the water-soluble groups, by amine-neutralization of the remaining free carboxyl groups in the resin. But it is very difficult to remain the definite quantity of the free carboxyl groups in the synthesis of PU resin, since a large quantity of polyols are used as raw material.
    This difficulty was overcome successfully by the usage of dimethylol propionic acid in which two hydroxyl groups were more reactive preferentially than one carboxyl group.
    The syntheses of water-soluble PU resin were investigated on the following items :
    1) suitable composition of the raw material based on polyester modified PU resin
    2) cross-linking reagent
    3) modification by epoxy resin
    4) introduction of the blocked NCO-group
    The relation between the composition of raw materials in PU resin and the properties of enameled films was studied. The films on the electrical insulating copper wire prepared from the water-soluble PU varnishes based on these results were by no means inferior to ones from the commercial solvent-soluble type.
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  • Dispersability of Pigments in Aqueous Solutions of Anionic Oligosoaps [I]
    Aqueous Dispersion of Phthalocyanines and Carbon Black
    Yutaka ISHIGAMI, Shigeru SUZUKI, Shinsuke YAMAZAKI, Hiroshi SUZUM
    1981 Volume 54 Issue 11 Pages 671-679
    Published: November 20, 1981
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.54.671
    JOURNAL FREE ACCESS
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    Anionic oligosoap homologues were prepared from the alternating cooligomers (n=4-93) of diethyl maleate (or maleic anhydride) C2-C16 alkyl vinylether. Their dispersing actions were studied on the aqueous suspension of α-and β-copper phthalocyanine blue, copper phthalocyanine green and carbon black (furnace). (1) It was found that anionic oligosoap homologues were probably used as an alternative dispersant to other functional agents, such as ordinary surfactants. Especially, partially saponified products of the alternating cooligomers of diethyl maleate and butyl vinylether are expected to be common dispersants which are stable for the temperature change and for added electrolyte, and show low-foaming property. (2) Moderate lengths (C4-C10) of side alkyl chain in the structure of the oligosoaps played important roles in the dispersability of the solids. This suggests that alkyl groups of oligosoaps adsorb on the hydrophobic parts of the solid surface, and then suspend and stabilize solids even in the concentration of 0.1% or less. (3) Oligosoaps having smaller degrees (<10) of oligomerization were more effective in the dispersing action. (4) Oligosoaps having smaller degrees of saponification exerted large dispersing action for phthalocyanines, but the saponification degrees of oligosoaps did not affect the dispersability of carbon black. It seems that the dispersibility depends on the surface conformation of the pigments.
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  • Titanium Dioxide Pigment
    Mamoru MATSUNAGA
    1981 Volume 54 Issue 11 Pages 680-689
    Published: November 20, 1981
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.54.680
    JOURNAL FREE ACCESS
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  • Color Carbon Blacks
    Masayasu ISHIBASHI, Eiji MARUYAMA
    1981 Volume 54 Issue 11 Pages 690-696
    Published: November 20, 1981
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.54.690
    JOURNAL FREE ACCESS
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  • Recent Progress in Organic Pigments
    Shigeru JUZU, Isao OIZUMI, Yasuyuki SUZUKI
    1981 Volume 54 Issue 11 Pages 697-705
    Published: November 20, 1981
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.54.697
    JOURNAL FREE ACCESS
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  • Rust Protection of Vehicle
    Mitsuo TSURUTA, Kazuhiro HOSHINA
    1981 Volume 54 Issue 11 Pages 706-713
    Published: November 20, 1981
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.54.706
    JOURNAL FREE ACCESS
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