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Volume 58, Issue 11
Displaying 1-7 of 7 articles from this issue
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Synthesis of Anionic Oligosoaps Having the Carboxylic -Hydroxyethylamide Groups and their PropertiesShigeru SUZUM, Yutaka ISHIGAMI1985 Volume 58 Issue 11 Pages 633-639
Published: November 20, 1985
Released on J-STAGE: November 20, 2012
JOURNAL FREE ACCESSWater-soluble oligomeric dispersants (oligosoap) for pigments were prepared by introducing carboxylic-hydroxyethyl-amide group into the side chains of maleic acid-C1-C16 alkylvinylether cooligomer (I). Namely, I was reacted for 10 minutes with a 15-fold mole ratio of 2-aminoethanol at 155-160°C, and the excess 2-aminoethanol was removed by distillation under the reduced pressure and the pasty blue product was washed with N/100 HCI solution or a small amount of water and then was dried in a vacuum.
These oligosoaps exhibited a remarkable surface tension lowering property and a large dispersing action for the paticles of phthalocyanine pigment (α-Cu-Pc), carbon black and iron oxide (α-Fe2O3). It was noteworthy that the oligosoaps having the long alkyl chains of C16 and C12 exerted a good dispersing action for α-Cu-Pc which had a lipophilic surface, in comparison with the C1 derivative. Further, all of the three oligosoaps were good dispersants for α-Fe2O3 which had a hydrophilic surface. And, the dispersing action of the oligosoaps for carbon black was good in the order of C16>C1>C12
These results would be attributed to the interaction between the alkyl chains or the carboxylichydroxyethylamide groups of the oligosoaps and the surface properties of the pigments examined.View full abstractDownload PDF (733K) -
Hiroshi FUKUI, Muneo TANAKA, Motokiyo NAKANO1985 Volume 58 Issue 11 Pages 640-647
Published: November 20, 1985
Released on J-STAGE: November 20, 2012
JOURNAL FREE ACCESSThe reaction between propylene oxide and pigments was carried out by gas phase method at 50°C and ampoule method at 37°C. The products were propylene glycol and polypropylene glycol. Distributions of the polypropylene glycol formed over prussian blue and kaolinite were Poisson distribution and maximum product was tetramer.
Because formation rate of polypropylene glycol over pigments can be seen in good agreement with dehydration rate of t-butanol over the same pigments, it was considered that the reaction proceeds as cation polymerization by acid sites.View full abstractDownload PDF (740K) -
Preparation of Black FilmSeisirô ITÔ, Yasuhiko FUJITA, Tosihide KUWAHARA, Masami TA ...1985 Volume 58 Issue 11 Pages 648-652
Published: November 20, 1985
Released on J-STAGE: November 20, 2012
JOURNAL FREE ACCESSAn aluminum plate with anodic oxide film deposited on its surface was kept heated at about 300°C, and air, or a mixture of air with nitrogen, containing the vapor of an organic compound, such as dicyclopentadiene and pyrene, was blasted onto the heated surface to cause incomplete combustion of the organic compound and fix the formed carbon particles inside the micropores in the surface film, thus giving a black anodic oxide film on aluminum.
It was found that, for a given organic compound, black film can be obtained at lower temperatures when the film has been previously dyed. The critical film thickness and the critical treating time necessary to achieve black film were 2 μm and 10 minutes, respectively. Black film was obtained at lower temperatures when air alone was used as the carrier gas that when an air-nitrogen mixture was employed.
The black film obtained by this method had a high surface hardness comparable with that of the hard anodic oxidation film, and showed exceptionally high lightfastness.View full abstractDownload PDF (632K) -
Noboru TAKEI, Masahiro YAMAZAWA, Toshihiko NAKAMICHI, Toyohiko YOSHIDA1985 Volume 58 Issue 11 Pages 653-660
Published: November 20, 1985
Released on J-STAGE: November 20, 2012
JOURNAL FREE ACCESSViscosity of high solid solutions of acrylic oligomer composed of a series of different monomer and molecular weight and oligomer concentration in metyl pentyl ketone have been studied.
The solution viscosity at any temperature could be estimated satisfactorily by WLF equation in the case of the low molecular weight oligomer. The higher the molecular weight of the oligomers the greater the deviation from the WLF equation. In these cases, however, if one of the constant in WLF equation was chosen suitably, the solution viscosity was well estimated by WLF equation.
The glass transition temperature of the solution estimated from the solution viscosity using WLF equation decreases linearly with increasing solvent concentration in this case.
One can estimate the solution viscosity of arbitrary concentration accurately at arbitrary temperature by measuring the viscosity of two different concentrations and at two different temperatures.View full abstractDownload PDF (738K) -
Application of ESCA to Studies for the Relation between the Orientation of the Polar Group at the Surface and the Surrounding Gas when the Resin is HardenedYasunori TARU, Kyo TAKAOKA1985 Volume 58 Issue 11 Pages 661-667
Published: November 20, 1985
Released on J-STAGE: November 20, 2012
JOURNAL FREE ACCESSThe relationship between orientation of polar groups at the surface of films and gaseous atomosphere on hardening of resin was investigated by ESCA and contact-angle measurements.
The resin were hardened in the air, in the steam (polar molecule) and in octane vapor (non polar molecule) at 130°C.
For the alkyed resin that was hardened in the steam, the polar group oriented much at the surface of the film. While for the film that was hardened in octane vapor, the polar group orientation was less at the surface.
For the amino-alkyd resin and the epoxy-polyamide resin that were hardened in the steam, the polar group containing nitrogen dived into an interior part of the film. While for the film that were hardened in octane vapor, the reverse tendency were recongnized at the resin-steam interface.
Because the polar group in the amino-alkyd resin is easy to move, the oriented polar group at the resin-gas interface is much more for amino-alkyd resin than the case of the epoxy-polyamide resin.View full abstractDownload PDF (879K) -
Application of Photoacoustic Spectrometry to Studies of Thermal Stability of ZrO2-SiO2 Coated, SiO2 Coated and Uncoated Chrome Yellow in PolyethyleneKyo TAKAOKA, Yasunori TARU, Minoru YOKOYAMA, Hiroshi HONDA1985 Volume 58 Issue 11 Pages 663-674
Published: November 20, 1985
Released on J-STAGE: November 20, 2012
JOURNAL FREE ACCESSThe thermal stabilities of uncoated, ZrO2-SiO2 coated and SiO2 coated chrome yellow pigments in polyethylene (PE) at thermal extrusion molding were studied by the method of photoacoustic spectroscopy.
The reduced thermal decomposition of chrome yellow in PE was led to the formation of Cr2O3, and this product contributed to the color changing of PE panel contained chrome yellow.
The amount of Cr2O3 was proportional to temperature of thermal extrusion molding of 0.5% uncoated chrome yellow in PE and these rate constant from 240°C to 280°C was 0.355%/°C and from 280°C to 320°C was 0. 183%/°C.
At the thermal extrusion molding of 0.5% ZrO2-SiO2 coated chrome yellow in PE, the amount of Cr2O3 was proportional to the temperature of thermal extrusion molding, and these rate constant from 240°C to 280°C was 0.108%/°C and from 280°C to 320°C was 0.088%/°C.
The controlled effect of color changing of sample panel by coated material on chrome yellow was indicated in order of ZrO2-SiO2SiO2.View full abstractDownload PDF (695K) -
Minoru TSUBOTA, Masayuki ARASE, Hisakazu TOMITA, Keiji MOTOYAMA1985 Volume 58 Issue 11 Pages 675-682
Published: November 20, 1985
Released on J-STAGE: November 20, 2012
JOURNAL FREE ACCESSAs the interval before recoating shortens, intercoat adhesive failure is liable to occur in the two coat system of amino-alkyd resin paint. The experiments were carried out to investigate the cause and mechanism for this phenomenon. The effects of the interval before recoating and the pretreatment irradiating UV to the undercoat surface on intercoat adhesion were examined using various enamels. In order to analyze the experimental results on intercoat adhesion, the change in surface properties of the undercoat was followed by the measurements of contact angles, ATR, IR and ESCA spectra. Main results were as follows : 1) It was generally recognized that intercoat adhesion increased with increasing the interval before recoating in two coat system of amino-alkyd resin paint. One of the factors affecting this result was surface oxidation of the undercoat due to air. 2) Intercoat adhesion increased remarkably by irradiating UV of wave lengths below 300 nm, and optimum level of irradiation time was recognized from the increasing tendency of intercoat adhesion. 3) From the results of surface analysis, formation of COOH, OH, hydroperoxide and C=0 groups on the irradiated undercoat surface was found. Wettability and intercoat adhesion increased with increasing concentration of these polar groups on the undercoat surface.View full abstractDownload PDF (873K)
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