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    • 81. 发明授权
    • Contact lens from hydrophilic gel polymers of polyvinylpyrrolidone and
hydroxyalkyl methacrylate
    • 隐形眼镜由聚乙烯吡咯烷酮和甲基丙烯酸羟烷基酯的亲水性凝胶聚合物组成
    • US3966847A
    • 1976-06-29
    • US430653
    • 1974-01-04
    • Maurice Seiderman
    • Maurice Seiderman
    • C08F26/06C08F220/12C08F220/28C08F271/02G02B1/04C08L31/02
    • G02B1/043C08F271/02
    • A plastic or resin product is obtained by mixing polyvinylpyrrolidone, modifiers and additives such as organic methacrylates, and crosslinking agents, and optionally catalysts, and causing polymerization to take place. The inventive product is insoluble in water but is hydratable with water, depending upon the proportions of the above mentioned components, and may take up in its structure as little as 5% by weight of water to as high as 90% by weight of water. The inventive hydrated product is optionally transparent, translucent, or opaque, and produced in any shape or size, depending only on the mold in which it is cast. The transparent product is especially suitable for contact lenses. The translucent and opaque products may be fabricated into membranes with pore sizes that can be made selectively, or cast into useful shapes and for other uses.
    • 通过混合聚乙烯吡咯烷酮,改性剂和添加剂如有机甲基丙烯酸酯,交联剂和任选的催化剂,并引起聚合而获得塑料或树脂产品。 本发明的产品不溶于水,但与水可水合,这取决于上述组分的比例,并且其结构可以占据至少5重量%的水至高达90重量%的水。 本发明的水合产品可任选地是透明的,半透明的或不透明的,并且是以任何形状或尺寸生产的,这取决于它所铸造的模具。 透明产品特别适用于隐形眼镜。 半透明和不透明的产品可以被制造成具有可以选择性地制造或具有有用形状和其它用途的孔径的膜。