| 摘要 |
The purpose of the present invention is to provide: a copolymer for cosmetics, which has excellent water repellency and oil repellency even though a polyfluoroalkyl group therein has 6 or less carbon atoms; a surface treatment agent which contains the copolymer for cosmetics; a powder for cosmetics, which is treated with the surface treatment agent and has excellent water repellency and oil repellency; and a cosmetic preparation which contains the powder for cosmetics. A copolymer for cosmetics of the present invention contains: 70-90% by mass of a constituent unit (A) that is derived from a compound represented by formula (a); 2-25% by mass of a constituent unit (B) that is derived from a compound represented by formula (b); 2-25% by mass of a constituent unit (C) that is derived from a compound represented by formula (c); 0.1-10% by mass of a constituent unit (D) that is derived from a compound represented by formula (d); and a residue (E) of a chain-transfer agent (e) that contains an OH group or a COOH group.
€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒCH 2 =CR 1 -COO-Q 1 -Rf€ƒ€ƒ€ƒ€ƒ€ƒ(a)
€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒCH 2 =CR 2 -Q 2 -COOH€ƒ€ƒ€ƒ€ƒ€ƒ(b)
€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒCH 2 =CR 3 -COO-(R 4 O)n-R5€ƒ€ƒ€ƒ€ƒ€ƒ(c)
€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒCH 2 =CR 7 -COO-Q 3 -P(O)(OH)-R 8 €ƒ€ƒ€ƒ€ƒ€ƒ(d) |
