| 摘要 |
PROBLEM TO BE SOLVED: To provide an acidic hair cosmetic of non-rinsing-off type excellent in scent stability. SOLUTION: The multi-layered hair cosmetic of non-rinsing-off type is such as to comprise an oily layer and an aqueous layer, be 2-5.5 in the pH of the aqueous layer (diluted 20-fold by mass, at 25°C), and contain perfume ingredient(s) selected from those (a) to (e): (a) a 3-18C ester represented by formula: R<SP>1</SP>-COOR<SP>2</SP>(wherein, R<SP>1</SP>is H or such a 1-12C hydrocarbon group that an O or N atom may be interposed in between the C-C bond; and R<SP>2</SP>is such a 1-15C hydrocarbon group that an O atom may be interposed in between the C-C bond), (b) a total 4-18C acetal, (c) a total 15-17C macrocyclic lactone or macrocyclic ether-lactone, (d) a total 14-15C macrocyclic diester, and (e) a compound selected from phenylacetaldehyde, indole and 4(3)-(4-hydroxy-4-methylpentyl)-3-cyclohexene-1-carboxyaldehyde. COPYRIGHT: (C)2009,JPO&INPIT
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