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Plasma surface treatment of silicone hydrogel contact lenses with a flexible carbon coating.
Plasma surface treatment of silicone hydrogel contact lenses with a flexible carbon coating.
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机译:有机硅水凝胶隐形眼镜的等离子表面处理,带有柔性碳涂层。
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摘要
The present invention is directed to the surface treatment of silicone hydrogel contact lenses. In particular, the present invention is directed to a method of modifying the surface of a contact lens to increase its hydrophilicity by coating the lens with a carbon-containing layer made from a diolefinic compound having 4 to 8 carbon atoms. In one embodiment, an optically clear, hydrophilic coating is provided upon the surface of a silicone hydrogel lens by sequentially subjecting the surface of the lens to: a plasma oxidation reaction, followed by a plasma polymerization reaction in a the presence of a diolefin in the absence of air. Finally, the resulting carbon layer is rendered hydrophilic by a further plasma oxidation reaction or by the attachment of a hydrophilic polymer chains.
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