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 42, Issue 8
Displaying 1-5 of 5 articles from this issue
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  • Studies on the Curing of Phenolic-Epoxy Clear Enamel. II.
    Qualitative and Quantitative Analysis of Phenolic Ingredient in Cured Phenolic Epoxy System
    Isao TANIKAWA, Masaru MANIWA, Hisashi HOTTA, Seiichi KOBAYASHI
    1969 Volume 42 Issue 8 Pages 349-355
    Published: August 30, 1969
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.42.349
    JOURNAL FREE ACCESS
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    Qualitative and quantitative analysis of phenolic component of cured phenolicepoxy clear films has been studied by using infrared spectroscopic method. The kinds of epoxy and phenolic resins used, the methods of clear-enamel preparation, and curing and film preparaion procedures were the same as reported in the previous paper.
    The absorption figures in the regions, 1500-1450, 1150-1100 and 900-700 cm-1, were characteristic of the phenolic component. p-Cresol and p-phenyl phenol were identified from the characteristic absorptions in the three regions and quantitatively determined from D860cm-1/film weight (1/g/cm2) and D759cm-1/film weight, respectively. Phenol, o-cresol, m-cresol, bisphenol-A and alkyl phenols* were identified from the characteristic absorptions in the three regions and D2960cm-1/film weight, D1385cm-1/D1363cm-1, or D1462cm-1/D1363cm-1 as summarized in the following.
    D2960cm-1/film wt.-3.7 × 102< : Alkyl phenols-D1385cm-1/D1363cm-1-0.6> tert-Butyl phenol-8< Nonyl phenol 3.0-3.6 × 102 : Bisphenol-A 3.0 × 102> : Phenol, Cresols, Bisphenol-A-D1462cm-1/D1363cm-1-1.0> : o-Cresol 0.2-1.4 : Bisphenol-A-1.8-2.4 : Phenol-2.5< : m-Cresol (p-Cresol) (Alkyl phenol) (* main components)
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  • Abrasion Resistance of Paint Films
    Yoshio HAYAFUNE, Masaharu ONOZAWA, Kenji UEKI
    1969 Volume 42 Issue 8 Pages 357-361
    Published: August 30, 1969
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.42.357
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    Putties were prepared from alkyds of three different oil lengths, melamine resin, polyurethane, oil-modified polyurethane, unsaturated polyester, cashew, nitrocellulose lacquar and vinyl acetate emulsion at the P/B weight ratio of 75%. Pigments used were CaCO3 (40%) and talc (60%). The putty films were baked sufficiently; their sanding and stress-strain properties were compared. The oil-modified polyurethane putty had the highest abrasion resistance, while the unsaturated polyester had the lowest. The abrasion resistance R was related to the stress-strain properties through the equation
    R=C U1/14 (Y/E),
    where C is a constant, U breaking energy (g/mm2), Y yield point (g/mm2), and E (g/mm2) the Young's modulus.
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  • Throwing Power of Electropainting
    Nobuo FURUNO, Hitoshi KAWAI, Yoshiaki OYABU
    1969 Volume 42 Issue 8 Pages 362-371
    Published: August 30, 1969
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.42.362
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    The tube penetration method has been studied, and an equation was derived from which the length of strip coated can be calculated.
    A maleinized-oil type resin pigmented with carbon black and strontium chromate was neutralized with an amine, and was diluted with deionized water to 8 % solids to be used as a model paint. The current-time curve obtained when an 1. 75 cm diameter steel pipe was electrocoated at 100 V in a 10 cm diameter, 30 cm high stainlesssteel electrophoretic coating bath was the sum of two current-time curves obtained when the outside or inside of the tube to be coated was sealed. This suggested that the deposition inside the tube takes place independent of the deposition outside the tube. A 16 × 33 × O.3 mm steel strip was inserted into an 1.8 cm diameter glass tube and was electrocoated. The current passing through a small anode attached on the strip was measured. As the distance of the small anode from the glass tube exist was increased from 10 to 15 cm, the current peak site was shifted from 16 to 42 sec. When 100 V was applied to the strip for 15 sec, the length of strip coated was 10 cm.
    Partly based on these experimental results the equation,
    Th2= (a/L) (R/ρ) = (ρ/L) (E/ρ)
    has been derived, where Th is the length of strip coated (cm), a the area of glass tube cross section (cm2), L the distance round the strip (cm), ρ the specific resistance of the paint (Ω cm), R is equal to Eli, i the current density (A/cm2) measured on the strip surface at the end of deposition, and E the voltage applied. Varidity of the equation was confirmed by using a series of strips of 30 × 1.83 × O.03 to 30 × 0.27× 0.03 cm inserted in glass tubes of a = 2.86 cm2, and also by using a series of glass tubes of a=1.37 to O.39 cm2 with the inserted strips of L=1.46 cm, and finally by changing the paint concentration from 16 % down to 1 %, ; in order to change 1/ρ from 300 to 3400 μU/cm.
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  • Amino-s-Triazine Compounds and Triazine Resins for Coating
    Yukio NOMURA
    1969 Volume 42 Issue 8 Pages 372-377
    Published: August 30, 1969
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.42.372
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  • Guided Lecture of Synthetic Resins for Paint Industry (IX)
    New Resins for Paint Industry
    Hiroshi KAKIUCHI
    1969 Volume 42 Issue 8 Pages 383-388
    Published: August 30, 1969
    Released on J-STAGE: November 20, 2012
    DOIhttps://doi.org/10.4011/shikizai1937.42.383
    JOURNAL FREE ACCESS
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