Ajinomoto Co., Ltd.

Masako Koyama

Hiroji Ishii

Tomomichi Ichikawa

Toshihiko Funakubo

Ryosuke Yumioka

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.

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Kawasaki, Japan

Masako Koyama