| abstract |
An oxygen-permeable polymer is prepared by polymerizing (1) at least one first monomer selected from the group consisting of alkenes of 6-10 carbon atoms having one double bond and one side chain methyl group, and (2) at least one second monomer selected from the group consisting of (fluoro)siloxanylalkyl mono(meth)acrylates, (fluoro)siloxanylalkyl di(meth)acrylates, fluoroalkyl (meth)acrylates, alkyl (meth)acrylates, α-alkyl- or α-fluoroalkyl-acrylic acids, alkyl α-alkylacrylates, alkyl α-fluoroalkylacrylates, fluoroalkylacrylates, fluoroalkyl α-fluoroalkylacrylates and fluoroalkyl α-ackylacrylates, the copolymerization proportions of the first monomer and the second monomer being such that the first monomer ranges from 5-80% by weight and the second monomer ranges from 20-95% by weight. The polymer produced by the process has very high oxygen permeability, is resistant to adhesion and adsorption of staining substances present in lacrima or intraocular solution, and has excellent machinability and grindability. |