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    • 5. 发明专利
    • HYDROUS CONTACT LENS
    • JPH10253931A
    • 1998-09-25
    • JP6044397
    • 1997-03-14
    • SEED CO LTD
    • UNO KENJISHIROGANE TAIICHIHONDA SACHIKOIKEDA YUKI
    • G02C7/04C08F220/28C08F220/34
    • PROBLEM TO BE SOLVED: To lessen accumulation on the surface by the charge included in the protein, etc., in the lacrimal fluid, and to improve the economy and thermal stability, by constituting a hydrous contact lens of a polymer obtd. by polymerizing a monomer mixture consisting of a specific radial polymerizable polymer, etc., and making quaternary ammonium ions, etc., exist therein in a specific form. SOLUTION: This hydrous contact lens consists of a polymer obtd. by polymerizing the monomer mixture consisting of 0.5 to 49 pts.wt. radical polymerizable monomer having a quaternary ammonium salt, 0.5 to 49 pts.wt. radical polymerizable polymer which is the (meth)acryloyoxyethylcarbocylic acid expressed by the formula, 8 to 97 pts.wt. 2-hydroxyethyl methacrylate and 2 to 91 pts.wt. their copolymerizable monomer. The counter ions of the quaternary ammonium ions and the carboxyl ions are deoxidized or desalted and exist in the for of zwitter ions. In the formula, R denotes hydrogen atom or methyl group. X denotes a 2 to 6C alkyl group, phenyl group or cyclohexyl group.