| abstract |
PURPOSE: To provide a contact lens having a humid, flexible and oxygen- permeable characteristics and having the skeletal unit of polysiloxane and polyoxyalkylene block copolymer, making possible to give a surface humidity and oxygen permiability in an aqueous using environment by composing so that a crosslinked block polymer including the unit of polysiloxane and polyalkylene oxide is used. n CONSTITUTION: This contact lens is made from a crosslinked polymer of a reactive monomer having the segment of (W-S'-L-D-A-L)a. In the formula, (a) is 1-10, (D) is respectively independent oxygen or N(R°), (W) is respectively single bond, oxygen or N(R°), (S') is the segment of respectively independently the general formula I], (L) is respectively independently -BRB'-, -BR-, -RB'- or -R-, and (A) is the segment respectively independently of the general formula II]. n COPYRIGHT: (C)1989,JPO |