ポリオキシプロピレンセチルエーテルのポリオキシエチレン誘導体について-1-

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Polyoxyethylene derivatives (1, 5, 10 and 20 moles of ethylene oxide, E, in a molecule) of polyoxypropylene cetyl ethers (1, 2, 4 and 8 moles of propylene oxide, P, in a molecule, respectively) were prepared and the change in properties of these 16 kinds of alkylene oxide derivatives, varying the number of moles of P and E was studied. (1) Solubility : Increase in hydrophobic property was observed with increase of the mole number of P in these derivatives and at the same time, a tendency to decrease the affinity against oil, having low polarity, was observed. (2) Surface tension of aqueous solution : A tendency to lower the concentration, at which reduction in surface tension will occur, was observed with increase of the mole number of P in a molecule. Except certain samples, the lowering power of surface tension was reduced with increase of the added mole number of E in a molecule, at a definite concentration. (3) Foaming power of aqueous solution : Foaming power of aqueous solution of these derivatives became larger according to the increase in added mole number of E in the molecule. By increasing the mole number of P, foaming power decreased for the cases of the derivatives having 1 and 20 moles of E in their molecules, and for the cases of those having 10 moles of E it increased contrary. (4) Foam stability of aqueous solution : Foam stability generally became worse with increase of the mole number of P. And it is expected to exist an optimum mole number of E which will show a good stability among the derivatives of E from 1 to 20 moles. (5) Wetting power of aqueous solution : With increase of the mole number of P, wetting power became greater for the derivatives having 20 moles of E and became lower for those having 10 moles of E.
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ポリオキシプロピレンセチルエーテルのポリオキシエチレン誘導体について-1-

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