| 摘要 |
<p>An ocular lens material comprising a silicone compound having a zwitterionic group (I) represented by the formula (I): <CHEM> wherein R<1> is H or an alkyl, R<2> is an aliphatic hydrocarbon or an aromatic hydrocarbon, A<1> is O, S, NH or direct bond, A<2> is POO<-> or SOO<-> , A<3> is O, S, NH or =O, in which when A<2> is SOO<->, A<1> and A<3> are not S, and when A<3> is =O, R<2> is absent, each of p and q is 1 to 20; a zwitterionic group (II) represented by the formula (II): <CHEM> wherein R<3> is H or an alkyl, A<4> is O, S, NH or direct bond, each of r, s and t is 1 to 20; or a zwitterionic group (III) represented by the formula (III): <CHEM> wherein R<4> is H or an alkyl, each of A<5> and A<6> is O, S, NH or direct bond, in which A<5> and A<6> are not direct bonds at the same time, u is 1 to 20, and a process for producing the same. The ocular lens material shows excellent transparency, oxygen permeability, deposit resistance and wettability to tears at the same time.</p> |
