| 摘要 |
<p>There are prepared acrylates and methacrylates of the formula (III), wherein R is hydrogen or methyl, and wherein A is the unit (I), wherein x is 0 to 4, or the unit (II). The novel siloxane compounds can be copolymerized with (1) a monoethylenically unsaturated monomer and (2) a polyethylenically unsaturated crosslinking agent. The resulting copolymers have high oxygen permeability and proper hydrophilic property. They can be made substantially water non-absorptive. Contact lenses fabricated from such copolymers can, if desired, be worn continuously for long periods of time. </p> |
