界面活性剤-油-水系及び界面活性剤-油-水-長鎖アルコ-ル系における安定エマルション領域〔英文〕
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A ternary diagram for nonionic surfactant-oil-water system was studied and the region of stable and strongly opaque emulsion (the region E<SUB>1</SUB>) was determined on the diagram. It was found that the E<SUB>1</SUB> region existed only within the two-phase region consisting of a viscous isotropic phase and an oil phase, and that at least 10% surfactant was necessary to obtain this region.<BR>The quarternary system containing cetostearyl alcohol in addition to the ternary system was also examined. Addition of the alcohol produced a new stable region of strongly opaque emulsion (the region E<SUB>2</SUB>) besides E<SUB>1</SUB>. The appearance of the region E<SUB>2</SUB> reduced the minimum surfactant concentration to obtain the stable and strongly opaque emulsion to about 2%. Similar effect was observed for behenyl alcohol of cosmetic grade, which is also a mixture of alcohols. However, pure alcohols of carbon numders from 12 to 16 lacked the ability to form the E<SUB>2</SUB> region. Those of carbon numbers of 18 and 20 gave the E<SUB>2</SUB> region but only above the surfactant concentration of 5%.
- 日本油化学会の論文
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