Loading patent…
AssigneeKanebo, Ltd.
InventorsKenji Mori, Kazuyoshi Morita, Shizume Takemoto, Hisanao Nagasawa, Yasuhisa Ohtani, Masashi Matsui, Sohichi Arai
Estimating the term…
A proteinaceous emulsifier can be obtained by reacting an amino acid ester with a hydrophilic protein in the presence of an endopeptidase to form decomposition products of the hydrophilic protein having a carboxyl end group joined to the amino group of the amino acid ester by amide linkage. This proteinaceous emulsifier has a typical surfactant structure in which a hydrophobic portion consisting of the amino acid ester is attached to the rear end of a hydrophilic portion consisting of the protein, and is characterized by causing little irritation to the skin, exhibiting strong emulsifying power and possessing moisture retention properties. Thus, it is very suitable for use as an emulsifier in various cosmetics such as creams, milky lotions and the like.
An emulsion type cosmetic composition comprising an oil phase and an aqueous phase, said composition containing, as the emulsifier, a proteinaceous emulsifier composed of (1) a decomposition product of a hydrophilic protein, said decomposition product having a carboxyl end group, said carboxyl end group of said decomposition product being joined to (2) the amino group of an amino acid ester by an amide linkage, said amino acid ester having an alcohol residue containing 14 to 22 carbon atoms.
Dependencies are inferred from the claim text.