An object of the present invention is to provide a monomer having a polysiloxane structure and capable of providing a polymer having sufficient compatibility and hydrolysis resistance while having high oxygen permeability useful for an ophthalmic device, and a method for producing the monomer. The present invention provides a compound represented by the formula (1) which has a radical-polymerizable group at one terminal, one to three alkylsiloxy groups having a hydrophilic and bulky group represented by formula (3-A) or formula (3-B), and has a divalent hydrocarbon group L which has 2 to 20 carbon atoms and may contain one or more selected from an ether bond and a urethane bond, a part of hydrogen atoms bonded to the carbon atoms may be substituted with a hydroxyl group.
本发明的一个目的是提供一种具有多聚
硅氧烷结构并能够提供具有足够相容性和耐
水解性的聚合物的单体,同时具有高氧透过性,适用于眼科器械,并提供一种制备该单体的方法。本发明提供了一种由式(1)表示的化合物,该化合物在一个末端具有一个基团可聚合化,具有一个或三个烷基
硅氧基团,其具有由式(3-A)或式(3-B)表示的亲
水性和臃肿基团,具有一个含有2到20个碳原子的二价碳氢基团L,并且可能包含一个或多个
乙醚键和
脲键中选定的一个,与碳原子键合的氢原子的一部分可以被羟基取代。