| 摘要 |
<p>The invention concerns cross-linked polymers which are the polymerization products of a polymerizable mixture containing the following components: a) a macromer of formula (C) in which Macro is an m-valent macromer group from which m of the Rx-H groups have been removed, the Rx groups are, independently of each other, a bond, -O-, NRN- or -S-, RN being hydrogen or lower alkyl, PI* is a bivalent photo-initiator group, Raa is the part of the photo-initiator which forms the less reactive radical when the photo-initiator splits up, and m is a whole number from 1 to 100; b) a copolymerizable vinyl monomer and c) a copolymerizable cross-linking agent. These polymers are particularly suitable for use in the production of moulded articles such as contact lenses.</p> |
