Patent ID: 8821903

Claim:
A vesicle composition formed from components (A), (B) and (C) and water and having an aqueous phase as a continuous phase, a vesicle being contained in the vesicle composition at 4 times by volume or more relative to a content of component (A): (A) a branched fatty acid represented by formula (1) wherein the formula (1), R 1 represents a methyl group or an ethyl group, and n represents an integer of 5 to 36; (B) a tertiary amine represented by formula (2) wherein the formula (2), R 2 represents a straight-chain or branched alkyl or alkenyl group having 6 to 24 carbon atoms, R 3 and R 4 represent identical or different alkyl groups having 1 to 6 carbon atoms or -(AO)mH wherein AO represents an oxyalkylene group having 2 to 4 carbon atoms, m represents an integer of 1 to 6, the m AOs may be identical to or different from each other, and they may be in any sequence; (C) an organic acid having 1 to 10 carbon atoms; wherein the vesicle composition is produced by a method comprising a step of a phase inversion emulsification; an optional component that can be added to the oil phase is not more than 1% of the oil phase; the vesicle component does not include sterols; and when the vesicle is spherical shape, an average particle size is 3-20 μm.