Proteinaceous emulsifier, process for preparing same and emulsion type cosmetic compositions containing same

• Main Authors: MORI; KENJI, MORITA; KAZUYOSHI, MATSUI; MASASHI, OHTANI; YASUHISA, ARAI; SOHICHI, NAGASAWA; HISANAO, TAKEMOTO; SHIZUME
• Format: Patent
• Language: English
• Published: 02.05.1989
• Edition: 4
• Subjects: ADHESIVES; CHEMISTRY; DYES; HUMAN NECESSITIES; HYGIENE; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; MEDICAL OR VETERINARY SCIENCE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; POLISHES; PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES; SPECIFIC USE OF COSMETICS OR SIMILAR TOILETPREPARATIONS

PCT No. PCT/JP84/00512 Sec. 371 Date Jun. 25, 1985 Sec. 102(e) Date Jun. 25, 1985 PCT Filed Oct. 26, 1984 PCT Pub. No. WO85/01890 PCT Pub. Date May 9, 1985.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.