PROBLEM TO BE SOLVED: To provide an emulsifier for foamable oil-in-water type emulsion composition which is excellent in an effect for improving emulsion stability of a foamable oil-in-water type emulsion composition, heat resistance of whipped cream obtained by whipping the composition, and an effect for improving shape retention.SOLUTION: An emulsifier for foamable oil-in-water type emulsion composition is polyglyceryl fatty acid ester satisfying the following conditions 1 to 3. Condition 1: an average degree of polymerization of polyglycerol is 3 or more. Condition 2: a content of a saturated fatty acid having 16 to 18 carbon atoms in 100 mass% of a constituent fatty acid is 50-85 mass%. Condition 3: a content of a saturated fatty acid having 22 carbon atoms in 100 mass% of the constituent fatty acid is 15-50 mass%.SELECTED DRAWING: NoneCOPYRIGHT: (C)2018,JPO&INPIT【課題】起泡性水中油型乳化組成物の乳化安定性の改善効果及び該組成物をホイップして得られるホイップクリームの耐熱性、保形性の改善効果に優れた起泡性水中油型乳化組成物用乳化剤を提供すること。【解決手段】下記条件1~3を満たすポリグリセリン脂肪酸エステルであることを特徴とする起泡性水中油型乳化組成物用乳化剤。条件1:ポリグリセリンの平均重合度が3以上条件2:構成脂肪酸100質量%中、炭素数16~18の飽和脂肪酸の含有量が50~85質量%条件3:構成脂肪酸100質量%中、炭素数22の飽和脂肪酸の含有量が15~50質量%【選択図】 なし
