Ajinomoto Co., Ltd.

Hiroji Ishii

Gaku Hattori

Masako Koyama

Masahiro Ino

Tomomichi Ichikawa

Toshihiko Funakubo

Ryosuke Yumioka

Fumie Honkawa

The present invention provides a method of producing an aqueous solution containing an N&#x2014;Cacyl acidic amino acid and/or a salt thereof and having pH 8.4-9.5, including the first step for reacting an acidic amino acid and/or a salt thereof with a Cfatty acid chloride in a water solvent at pH 10-13 to form an N&#x2014;Cacyl acidic amino acid salt, and the second step for adjusting the pH of the aqueous solution after the first step to 8.4-9.5.

Aqueous solution containing n-long-chain acyl acidic amino acid and/or salt thereof, and method for producing same

Moisturizers including an acyl neutral amino acid having an acyl group with a carbon atom number of 2 to 18, and salts thereof, and cosmetics containing such a moisturizer promote the production of moisturizing-related proteins, such as filaggrin, involucrin, transglutaminase 1, keratin 10, and loricrin, and provide a moisturizing effect.

Moisturizer and cosmetic including the same

Aqueous solution containing N-long-chain acyl acidic amino acid and/or salt thereof, and method for producing same

An N-long-chain acyl neutral amino acid ester containing a straight-chain or branched-chain, saturated or unsaturated acyl group having from 6 to 22 carbon atoms, where the hydrocarbon group of the alcohol constituting the ester is a straight-chain or branched-chain, saturated or unsaturated hydrocarbon group having from 1 to 10 carbon atoms disclosed herein is an oily material suitable for cosmetic compositions, which provide an excellent feeling upon use and also an excellent hair conditioning effect to a cosmetic composition containing the same. An ultraviolet ray-absorbing composition containing the N-long-chain acyl neutral amino acid ester or/and an N-long-chain acyl acidic amino acid diester is provided, which also has excellent feel. An inorganic pigment composition containing the N-long-chain acyl neutral amino acid ester or/and the above-mentioned N-long-chain acyl acidic amino acid diester is also provided, which has excellent dispersion (stability) of the inorganic pigment, is less irritating to the skin, has excellent feel upon use and is not sticky.

Cosmetic composition containing N-acyl neutral amino acid esters of lower alcohols

Herein is disclosed an oily material composition comprising, as effective components, both a specific alkyl or alkenyl ester of an N-long chain acyl neutral amino acid and a specific sterol ester of an N-long chain acyl neutral amino acid, or further an amphipathic substance in addition to the said two kinds of esters, which composition has both good moisturizing property and good moisture-permeating property, as well as good water-incorporating property and good emulsification stability, and shows a good feel on use (i.e., non-stickiness, good compatibility, no heavy touch and good spreadability), and shows, when incorporated in a cosmetic composition or a dermal external agent composition, an advantage of giving moisturizing property and moisture-permeating property as well as emulsification stability thereto and of giving a good feel on use.

Oily material composition

Herein are disclosed N-long chain acyl-neutral amino acid polyglycerin esters composed of a polyglycerin having a degree of glycerin polymerization of not smaller than 4 and an N-long chain acyl-neutral amino acid having an acyl group with from 6 to 22 carbon atoms and a nonionic surfactant composition comprising, as an active ingredient, at least one of said N-long chain acyl-neutral amino acid polyglycerin esters, which are favorably safe and which, when incorporated in cosmetic compositions or percutaneous preparations, are sensorially good.

Growing community of inventors

Kawasaki, Japan

Hiroji Ishii