Catalytic Activity of Pigments (III)

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  • 顔料の触媒活性 (第III報)
  • 顔料の触媒活性-3-顔料の油脂酸化活性のDTAによる評価
  • ガンリョウ ノ ショクバイ カッセイ 3 ガンリョウ ノ ユシ サンカ カッセ
  • 顔料の油脂酸化活性のDTAによる評価
  • Catalytic Activity of Pigments for Castor Oil Oxidation by Differential Thermal Analysis

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Abstract

Oxidation of castor oil by the pigments was discussed with oxygen gas flow-DTA. The pigments were classified into three groups by the oxidation behavior of castor oil.<BR>Group 1. The type of pigments which promotes the oxidation of castor oil ; Hydrated Chromium Oxide, Red Iron Oxide, Yellow Iron Oxide, Black Iron Oxide, Prussian Blue<BR>Group 2. What has no influence for the oxidation of castor oil ; Zinc Oxide, Kaolinite, Mica, Ultramarine Blue, Silica<BR>Group 3. What inhibits the oxidation of castor oil ; Talc, Titanium Dioxide<BR>The pigments promoting the oxidation of castor oil were the color pigments with the transition elements such as chromium, iron, manganese. The oxidation activity is considered to have no relation to acid-base sites of pigments surface. Moreover, this oxygen gas flow-DTA method was in good agreement with the active oxygen method (AOM).

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