香料,非イオン界面活性剤,水の三成分系状態図に関する研究

抄録

Phase diagrams of ternary systems consisting of decaoxyethylene nonylphenyl ether (NP-10), essential oils different in polarity and water have been studied.
From the phase diagrams obtained, six essential oils were classified into two groups, the first group of higher polarity being ethyl phenyl acetate, geraniol and isoeugenol methyl ether; the second group of lower polarity being α-ionone, α-amyl cinnamic aldehyde and limonene.
In the ternary system containing the essential oil of the first group, the phase diagram showed that the hardening region decreases gradually and eventually disappears and approaches toward the phase diagram of aqueous binary system of surfactant having more decreased degree of polymerization of ethylene oxide, in accordance with the decrease in the weight ratio of NP-10 to essential oil (S/E ratio). It was also found that the phase diagram of ternary system containing essential oil of the second group showed no disappearance of hardening regions and also the appearance of a new hardening region with the decrease in S/E ratio. The latter phase diagram was quite different with that of binary system of aqueous surfactant.