| 摘要 |
Crosslinked hydrogel-forming polymer comprises a hydrophilic monomer (I) and a polyunsatd. polymeric crosslinking agent (II). Pref. the polymer comprises at least 35 wt.% (I) and up to 20 wt.% (II). UV-absorbing hydrogel-forming polymer comprises (I) and opt. non-hydrophilic monomer and includes units contg. a UV-absorbing moiety which in the final polymer network is bound as part of the polymer structure. |
