金属キレートの利用に関する研究 (第11報) : EDTA-ビス (N, N-ジアルキルアミド) キレート界面活性剤の合成とその界面活性

概要

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Four chelating agents ((I) (IV)) were obtained on condensation of ethylenediaminetetraacetic acid (EDTA) with four secondary amines (dipropyl- (I), dibutyl- (II), dipentyl- (III), dihexylamine (IV)). Surface activities of the chelate solution were investigated. All of metal chelates prepared from (I) and (II), and aluminium-, cobalt-, nickel- and zinc chelates from (III) were soluble in water, but the other chelates insoluble. Surface and interfacial tensions of the aqueous solution of the chelates decreased with an increase in alkyl chain length of the chelates. Dispersing power of the chelates for TiO2/toluene-butanol (1 : 1) system increased with a decrease in the alkyl chain length. The sodium salts of (II), (III), and (IV) showed good surface activities, especially when emulsified in kerosene or when wetted on a canvas substrate.
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