PROBLEM TO BE SOLVED: To provide an oily hair cosmetic composition and an oily hair cosmetic which can be stably blended in an oily raw material and have an excellent effect of giving springiness and stiffness to hair by imparting excellent tensile strength to hair when applied to hair, imparting moist feeling and setting performance to hair and further imparting smoothness or gloss to hair.SOLUTION: There is provided an oily hair cosmetic composition which is constituted of 0.1 to 50 mass% of isostearoyl hydrolyzed keratin represented by the following general formula (I) (wherein, RCO represents an isostearoyl group, R1 represents a side chain of various amino acids constituting a hydrolyzed keratin peptide and n represents an average degree of polymerization of amino acids and is a value of 1 to 3.) and 50 to 99.9 mass% of one or more oily materials selected from a fatty acid ester of a fatty acid having 8 to 22 carbon atoms and a monohydric alcohol having 8 to 22 carbon atoms, a fatty acid having 16 to 22 carbon atoms, a liquid isoparaffin, a hydrogenated polyisobutene and squalane, and there is provided an oily hair cosmetic obtained by incorporating the composition.SELECTED DRAWING: NoneCOPYRIGHT: (C)2018,JPO&INPIT【課題】油性原料中に安定に配合でき、毛髪に適用した際には、優れた毛髪の引張り強度を与えてハリ・コシ感を付与し、毛髪に保湿感、まとまり性を与え、さらになめらかさや艶を付与する効果に優れる油性毛髪化粧料用組成物および油性毛髪化粧料を提供する。【解決手段】 下記一般式(I)(式中、RCOはイソステアロイル基を示し、R1は加水分解ケラチンペプチドを構成する種々のアミノ酸の側鎖を表しnはアミノ酸の平均重合度を示し、1~3の値である)で表されるイソステアロイル加水分解ケラチンを0.1~50質量%、および、炭素数8~22の脂肪酸と炭素数8~22の一価アルコールとの脂肪酸エステル、炭素数16~22の脂肪酸、流動イソパラフィン、水素添加ポリイソブテン、スクワランから選ばれる1種以上の油性物質を50~99.9質量%て油性毛髪化粧料用組成物を構成し、該組成物を含有させて油性毛髪化粧料を構成する。【選択図】なし
