abstract |
A (poly) siloxane monomer excellent in wettability suitable for ophthalmic device production and a method for producing the same. A compound represented by the following formula (1) (In the formula, R 1 is a hydrogen atom or a methyl group, L 1 is a single bond or a C 1-6 divalent hydrocarbon group, and Z has a quaternary ammonium group or a zwitterionic group. A monovalent organic group having 1 to 10 carbon atoms, A is a linear or branched organopolysiloxanyl group having 1 to 100 siloxane units, and L 2 may include an ether bond, A linear, branched or cyclic divalent hydrocarbon group having 2 to 10 carbon atoms, and L 3 is a divalent or trivalent hydrocarbon group having 1 carbon atom, and L 3 is 3 In the case of valence, L 3 and L 2 are combined to form a ring). [Selection figure] None |