PROBLEM TO BE SOLVED: To provide novel emulsion compositions for producing foam agents capable of producing foam without using surfactant, to provide foam agents, to provide methods for improving foamability, to provide foamability improving agents, and to provide make-up methods.SOLUTION: An emulsion composition for producing a foam agent comprises an oil phase, an aqueous phase, a closed endoplasmic reticulum formed of an amphipathic substance which forms a closed endoplasmic reticulum spontaneously, or a particle of a polycondensation polymer having a hydroxyl group, and a thickener. The foam agent comprises an undiluted solution consisting of the emulsion composition, and a propellant. A method for improving foamability is characterized by further incorporating a thickener into the emulsion composition for producing a foam agent which comprises an oil phase, an aqueous phase, a closed endoplasmic reticulum formed of an amphipathic substance which forms a closed endoplasmic reticulum spontaneously, or a particle of a polycondensation polymer having a hydroxyl group.SELECTED DRAWING: NoneCOPYRIGHT: (C)2018,JPO&INPIT【課題】界面活性剤を用いずとも良好な泡を形成可能な新規なフォーム剤作製用乳化組成物、フォーム剤、泡形成力を向上させる方法、泡形成力向上剤及び化粧方法を提供する。【解決手段】フォーム剤作製用乳化組成物は、油相、水相、自発的に閉鎖小胞体を形成する両親媒性物質により形成された閉鎖小胞体又は水酸基を有する重縮合ポリマーの粒子、及び増粘剤を含む。フォーム剤は、該乳化組成物からなる原液と、噴射剤とを含む。泡形成力を向上させる方法は、油相、水相、及び自発的に閉鎖小胞体を形成する両親媒性物質により形成された閉鎖小胞体又は水酸基を有する重縮合ポリマーの粒子を含むフォーム剤作製用乳化組成物中に、さらに、増粘剤を含有させることによる。【選択図】なし
