有機ビルダー (第21報) : メチルグルコシド骨格を有するポリカルボン酸

概要

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New type polycarboxylates containing either ether linkages or ether and hydroxyl groups were prepared by the reaction of methyl α-D-glucopyranoside with ethyl diazoacetate (acetate-type) or diethyl diazomalonate (malonate-type), or by the air oxidation of ethoxylated methyl α-D-glucopyranoside with 5% platinum catalyst on carbon (acetate-type). Their building performance in detergents, sequestration capacity for Ca (II), dispersion capacity for MnO<SUB>2</SUB> and biodegradabilities were determined and compared in these respects with sodium tripolyphosphate (STPP), disodium 3-oxapentanedioate (ODA) and trisodium citrate (CA). <I>O</I>-carboxymethylated methyl α-D-glucopyranoside was found to have better detergency building performance than that of ODA, but was slightly inferior to that of STPP. Malonate-type ether polycarboxylate showed building performance far superior to that of the corresponding acetate type ether polycarboxylates. Of the acetate-type builders tested in this report, tribasic acid was the most effective. These polycarboxylates derived from methyl α-D-glucopyranoside were found to be biodegradable under aerobic conditions. Binary mixtures of zeolite with these polycarboxylates showed synergistic properties in detergency powers.
社団法人日本油化学会の論文