Journal of the Japan Society of Colour Material

Preparation of Organic Pigments with Metal Oxides as Core

Synthesis of Organic Colors on Phenylated Silica

Mituru SUZUKI, Seisirô ITÔ, Tosihide KUWAHARA

1983 Volume 56 Issue 5 Pages 287-292
Published: May 20, 1983
Released on J-STAGE: November 20, 2012

DOIhttps://doi.org/10.4011/shikizai1937.56.287

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By treating silica fine powder with thionyl chloride, the silanols on the surface of silica were replaced with chlorine, and then phenylated on reacting with phenyllithium (_??_Si-OH→_??_Si-Cl→_??_Si-_??_)
Red or yellow pigment with silica as core was prepared by deriving the surface groups to the structure similar to organic colors (Sudan I or Tartrazine) as in Fig. 1 and the characteristics of these pigments were investigated.
The pigments produced by this method had colors similar to the corresponding dyestuff or the aqueous solution, and specific gravities agreed almost with the silica used as core. These pigments had very good resistance to water and each surface groups also did not disappear in the preparation stages. Resistances to heat, light and solvents were measured.

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Interaction of Synthetic Resin and Pigment (II)

Thermal Analysis of the Mixture of Inorganic Pigments and Linseed Oil Modified Alkyd Resin

Kyo TAKAOKA

1983 Volume 56 Issue 5 Pages 293-300
Published: May 20, 1983
Released on J-STAGE: November 20, 2012

DOIhttps://doi.org/10.4011/shikizai1937.56.293

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The interaction of the inorganic pigment and the linseed oil modified alkyd resin was studied by the method of the thermal gravimetric analysis (TGA) and differential thermal analysis (DTA).
The samples were prepared for the mixture of the pigment and linseed oil modified alkyd resin at equal weight.
Emerald green accelerated the oxidation reaction of modified oil group (reaction 1), and the thermal oxidative degradation of phthalic acid-glycerine ester group (reaction 2), ester group of oil (reaction 3) and polymerized group of oil (reaction 4) in linseed oil modified alkyd resin when determined by the method of TGA and DTA. These effects of the action of the pigment were greater on the stored sample for 500 hrs in air than on the fresh sample.
The interaction of zinc chromate and the resin was almost the same as that of Emerald green, furthermore on the stored sample for 500 hrs in air the oxidative polymerization was accelerated.
Viridian accelerated only reaction (1) on the fresh sample, but on the stored sample for 500 hrs in air it accelerated reaction (1), (2), (3), and (4).
Cadmium sulfide accelerated reaction (1), (2) and the oxidative polymerization reaction on the fresh sample. On the stored sample for 500 hrs in air the effect of the action of pigment was almost the same as that of the fresh sample.
Ultramarine had only the small effect on the reaction (1), but on the stored sample for 500 hrs in air it had the effect on reaction (1) and (2) to some extent.

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Trial Production of Low Temperature Plasma Reactor and Oxidization Treatment of Carbon Black

Tatuhiko IHARA, Seisirô ITÔ, Tosihide KUWAHARA, Mitsuo KIB ...

1983 Volume 56 Issue 5 Pages 301-306
Published: May 20, 1983
Released on J-STAGE: November 20, 2012

DOIhttps://doi.org/10.4011/shikizai1937.56.301

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Appropriate low temperature plasma reactor for oxidization treatment of carbon black, that is, the reactor for laboratory uses having the ability to depress the weight loss of sample and to treat the sample homogeneously was produced. From the result of investigation of relation between the structure of the reactor and the treating effect, following results were recognized :
1. An important point as to reactor was the mounting position of high frequency (HF) plate on the reaction chamber, and so long as the evolved plasma was in contact with the surface of carbon black sample, it was found to be favorable that the position of HF plate should be separated as far as possible from the surface of sample.
2. The sample was homogeneously treated and the weight loss of the sample was remarkably depressed by agitation throughout the treatment.
3. When the treatment is performed with agitation, the treating efficiency with high power (30, W) was better than with low power (15W) for the purpose of producing hydrophilic carbon black.

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Uses and Application of Fluorocarbon Resins Coating

Shigeya HANAZONO

1983 Volume 56 Issue 5 Pages 307-317
Published: May 20, 1983
Released on J-STAGE: November 20, 2012

DOIhttps://doi.org/10.4011/shikizai1937.56.307

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Characteristic Properties of Fluorocarbon Resin and Coating Materials

Toshiyuki OGAWA

1983 Volume 56 Issue 5 Pages 318-327
Published: May 20, 1983
Released on J-STAGE: November 20, 2012

DOIhttps://doi.org/10.4011/shikizai1937.56.318

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Composite Plating of Fluorine Resin Particles with Electroplated Metal

Sowjun MATSUMURA

1983 Volume 56 Issue 5 Pages 328-332
Published: May 20, 1983
Released on J-STAGE: November 20, 2012

DOIhttps://doi.org/10.4011/shikizai1937.56.328

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