PROBLEM TO BE SOLVED: To provide a transparent oily liquid thickener, in which polyamide 8 having been difficult to be compounded into an oil solution because of being solid, can be homogeneously compounded into the oil solution at a high concentration, the transparent oily liquid thickener having a high thickening effect to a particular oil solution a transparent thickening composition in which polyamide 8 is homogeneously compounded to the particular oil solution at the high concentration using the oily liquid thickener and a cosmetic using the oily liquid thickener or the thickening composition.SOLUTION: The invention relates to a transparent oily liquid thickener containing 5-50 mass% of polyamide-8 and 50-95 mass% of a liquid higher fatty acid having a branched or unsaturated alkyl group of C12 to C22, or a liquid higher alcohol having a branched or unsaturated alkyl group of C12 to C22 to a thickening composition containing 5-50 mass% of the oily liquid thickener and at least one oil solution selected from oils and fats and ester oil or hydrocarbon oil, and further to a cosmetic containing the thickening composition.SELECTED DRAWING: NoneCOPYRIGHT: (C)2017,JPO&INPIT【課題】固体であるため、油剤への配合が困難であったポリアミド-8を、油剤に高濃度で均一に配合することができ、特定の油剤に対して高い増粘効果を有する、透明な油性液状増粘剤、該油性液状増粘剤を用い、特定の油剤にポリアミド-8を高濃度で均一に配合した、透明な増粘性組成物、及び前記油性液状増粘剤又は前記増粘性組成物を用いた化粧料の提供。【解決手段】ポリアミド-8を5~50質量%と、C12~C22の分岐若しくは不飽和アルキル基を有する液状高級脂肪酸又はC12~C22の分岐若しくは不飽和アルキル基を有する液状高級アルコール50~95質量%とを含有する、透明な油性液状増粘剤。前記油性液状増粘剤を5~50質量%と油脂・エステル油又は炭化水素油から選択される少なくとも1種の油剤を含む増粘性組成物、更に前記増粘性組成物を含有する化粧料。【選択図】なし
