PROBLEM TO BE SOLVED: To provide a composition for external use, which imparts excellent moisture retention, wettability, lubricity and gloss to the skin or hair, spreads well in application, provides excellent impression in use without showing any stickiness after application and hardly undergoes separation when compounded with an aqueous cosmetic preparation.SOLUTION: The composition for external use comprises at least one partial ester (B) of amino acid obtained by neutralizing 30-100 mol% of carboxy groups in a partial ester (A) of amino acid using an alkali, provided that the partial ester (A) of amino acid is obtained through an esterification reaction carried out between N-acyl acidic amino acid (a) having a 6-30C acyl group and a diol (b) represented by formula (1) (wherein R1 is a 6-30C hydrocarbon group AO is a 2-6C oxyalkylene group and m+n is 0-10).COPYRIGHT: (C)2011,JPO&INPIT【課題】皮膚や毛髪に対して優れた保湿性、湿潤性、潤滑性及びつやを付与し、塗布時の伸びがよく、塗布後のべたつきがなく使用感に優れ、水系の化粧品製剤に配合しても分離し難い外用組成物を提供する。【解決手段】炭素数6~30のアシル基を有するN-アシル酸性アミノ酸(a)と、一般式(1)で示されるジオール(b)とをエステル化反応させて得られるアミノ酸部分エステル(A)が有するカルボキシル基のうち、30~100モル%がアルカリで中和されたアミノ酸部分エステル(B)を1種以上含有してなる外用組成物。 【化1】 式中、R1は炭素数6~30の炭化水素基、AOは炭素数2~6のオキシアルキレン基、m+nは0~10の数である。【選択図】なし
