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    • 9. 发明专利
    • HIGH-OXYGEN PERMEABILITY CONTACT LENS
    • JPH03181914A
    • 1991-08-07
    • JP32044089
    • 1989-12-12
    • NIPPON OILS & FATS CO LTD
    • AMAYA NAOYUKIANAMI KEIZOWAKI KAZUNORIMURATA TAKASHIGE
    • G02C7/04
    • PURPOSE:To improve mechanical strength, heat resistance and surface hardness and to allow continuous wearing by consisting the contact lens of a polymer of >=300,000 number average mol. wt. obtd. by copolymerizing specific fumaric diester and vinyl ester. CONSTITUTION:This contact lens consists of the polymer which is the non- crosslinkable high polymer obtd. by copolymerizing the fumaric diester expressed by formula I and the vinyl ester expressed by formula II and with which the mol. wt. of the non-crosslinkable high polymer is >=300,000 number average mol. wt. In the formula I, X and Y denote 3 to 12C branched alkyl group, 4 to 10C cycloalkyl group, aryl group having 4 to 10C cycloalkyl group having 3 to 12C branched alkyl group, etc. or the combination of the above-mentioned substituents. In the formula II, Z denotes 1 to 12C alkyl group, an aryl group having 4 to 10C cycloalkyl group, etc. or the combination of the above- mentioned substituents. The long-time continuous wearing is possible in this way and the shape stability, contamination resistance and durability are improved.