| 摘要 |
PROBLEM TO BE SOLVED: To provide an O/W-type emulsion composition having excellent high- temperature stability and usability. SOLUTION: The objective O/W-type emulsion composition contains a hydrophilic anionic surfactant, a higher aliphatic alcohol, water and an oil component and satisfies the following conditions (1) to (4). (1) The hydrophilic anionic surfactant, the higher aliphatic alcohol and water together form a gel having a transition temperature of >=60 deg.C, (2) the amount of the hydrophilic anionic surfactant constituting the gel is >=0.1 wt.% and <0.5 wt.% based on the amount of water in the O/W-type emulsion composition, (3) the molar ratio of the hydrophilic anionic surfactant to the higher aliphatic alcohol constituting the gel is 1:3 and (4) the composition contains excess higher aliphatic alcohol or amphiphatic substance free from participation in the formation of the gel in an amount of 0.5-10 wt.%.
|
