| 摘要 |
A composition which is photopolymerizable in the presence of water comprises : (a) a first monomer having olefinic unsaturation and a flexible hydrophillic chain and which may be polyethylene glycol ethyl ether methacrylate or methoxypolyethylene glycol methacrylate; (b) a second monomer having olefini c unsaturation, high free radical polymerization efficiency and which imparts tackiness on curing, and which may be N,N-dimethylacrylamide or 2- hydroxyethylacrylate; (c) a cross-linking agent; and (d) a photoinitiator. T he composition may be formed into a thin layer containing 2-40 wt.% of water before it is cured so that the product is a film. The cured film is transparent, adheres selectively to dry skin, and can be used as a wound dressing. Where the second monomer provides conductivity-imparting groups it may also be used as an electrode (e.g. as a grounding plate). If desired, 2- 20 wt.% of a low molecular weight polyol e.g. propylene glycol may be added to increase the adhesiveness of the cured film and/or a water-soluble natural o r synthetic polymer may be added to increase its adhesiveness, tackiness and improve the casting process.
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