| abstract |
The present invention provides compound of formulae (A1), (A2), (B1), (B2), (C1) and (C2) which can form a layer having water-repellency, oil-repellency and antifouling property as well as high friction durability:n n n n (Rf-PFPE) β' -X 5 -(SiR 1 n R 2 3-n ) β ··· (B1) n n (R 2 3-n R 1 n Si) β -X 5 -PFPE-X 5 -(SiR 1 n R 2 3-n ) β ··· (B2) n n (Rf-PFPE) γ -X 7 -(SiR a k R b 1 R c m ) γ ··· (C1) n n (R c m R b 1 R a k Si) γ -X 7 -PFPE-X 7 -(SiR a k R b l R c m)γ ··· (C2) n nwherein each symbols are as defined in the specification. |