abstract |
Disclosed is a surface treatment agent that forms a water- and oil-repellent layer that adheres well to a substrate and has excellent scratch resistance. In an organopolysiloxane, (R f 1 is a monovalent group having a perfluoroether residue, R f 2 is a divalent group having a perfluoroether residue, and Q is a divalent organic group) An organopolysiloxane having a structure as described above. [Selection figure] None |