| 摘要 |
PURPOSE:To obtain the titled compounds which are antioxidants, corrosion inhibitors, etc., with a stable hue of a light color, by reacting a hydroxyaryl compound with unsaturated fatty acids in the presence of activated clay as a catalyst, adding a specific compound and removing the above-mentioned catalyst. CONSTITUTION:A hydroxyaryl compound in an amount of preferably excess of unsaturated fatty acids is thermally reacted with the unsaturated fatty acids in the presence of activated clay as a catalyst at 125-225 deg.C, preferably 160-200 deg.C in, e.g. an autoclave. In the second stage, an oxyacid of phosphorus or a salt thereof is then added to the reaction solution containing the abovementioned hydroxyaryl fatty acids and reacted at a temperature within the range of normally 80-100 deg.C. The afore-mentioned catalyst contained in the reaction solution is subsequently removed by a filtration method, etc., to afford the aimed compounds. Furthermore, the amount of the added oxyacid of phosphoric acid or salt thereof is preferably within the range of 0.5-2wt.%. |
