| abstract |
A fluorine-modified polysiloxane derivative having an organopolysiloxane chain partially replaced by a siloxane chain represented by general formula (1), (2), (3), a process for the production thereof, an intermediate to be used for the production thereof, and a cosmetic containing the same, wherein R f and R f ' represent each C₁-C₂₀ perfluoroalkyl or ω-H-perfluoroalkyl of the formula H(CF₂) t - wherein t represents an integer of 1 to 20; a number of R¹ groups may be the same or different from each other and each represents C₁-C₂₀ linear or branched aliphatic hydrocarbyl or C₅-C₁₀ cycloaliphatic or aromatic hydrocarbyl; R² represents hydrogen, C₁-C₂₀ linear or branched aliphatic hydrocarbyl, C₅-C₁₀ cycloaliphatic or aromatic hydrocarbyl, C₁-C₂₀ perfluoroalkyl or ω-H-perfluoroalkyl of the formula H(CF₂) u - wherein u represents an integer of 1 to 20; R³ represents a C₂-C₁₀ divalent hydrocarbon group; X and Y represent each a single bond, -CO- or a C₁-C₆ divalent hydrocarbon group; l represents a number of 2 to 16; m and n represent each a number of 1 to 6; and r represents a number of 0 to 50. A cosmetic containing this compound has excellent water and oil repellency, can be held on the skin for long, and is comfortable to use. |