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    • 7. 发明授权
    • Process for producing a contact lens
    • 隐形眼镜的制造方法
    • US4839109A
    • 1989-06-13
    • US886266
    • 1986-07-16
    • Isao KaetsuMinoru KumakuraHidenari SuyamaNobuo KamedaHideo Koyama
    • Isao KaetsuMinoru KumakuraHidenari SuyamaNobuo KamedaHideo Koyama
    • G02C7/04C08F230/08G02B1/04
    • C08F230/08G02B1/043
    • A mixture of a specified siloxanylalkyl ester monomer and a specified vinyl monomer is polymerized by exposure to an ionizing radiation at low temperatures and the resulting polymer is worked with a lathe cut to form a contact lens. The contact lens obtained is free from any optical distortion, has good dimensional stability and exhibits high oxygen permeability. In a preferred embodiment, a monomer mixture comprising a siloxanylalkyl ester, a methacrylate or acrylate, N-vinylpyrrolidone, and a small amount of a dimethacrylate or diacrylate is exposed to a total dose of 1.times.10.sup.5 -5.times.10.sup.6 roentgens at a low temperature (-80.degree. C. to -20.degree. C. and at a dose rate of 8.times.10.sup.4 -2.times.10.sup.6 roentgens per hour, and the resulting polymer is worked into a contact lens by a suitable forming process involving cutting, grinding and polishing operations.
    • 指定的硅氧烷基烷基酯单体和特定乙烯基单体的混合物通过在低温下暴露于电离辐射而聚合,并且所得聚合物用车床切割加工以形成隐形眼镜。 获得的隐形眼镜没有任何光学变形,具有良好的尺寸稳定性和显示出高的透氧性。 在优选的实施方案中,包含硅氧烷基烷基酯,甲基丙烯酸酯或丙烯酸酯,N-乙烯基吡咯烷酮和少量二甲基丙烯酸酯或二丙烯酸酯的单体混合物在低温(-80℃)下暴露于总量为1×105-5×10 6个 以-20℃,剂量率为8×10 4 -2×10 6个/小时,并且通过涉及切割,研磨和抛光操作的合适的成型方法将所得聚合物加工成隐形眼镜。