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    • 9. 发明申请
    • COPOLYCARBONATE AND OPTICAL LENS
    • 共聚碳酸酯和光学透镜
    • US20110298143A1
    • 2011-12-08
    • US13201555
    • 2010-03-02
    • Kazunori NunomeManabu MatsuiYoshihiko Imanaka
    • Kazunori NunomeManabu MatsuiYoshihiko Imanaka
    • B29D11/00C08G64/20C08G64/16
    • C08G64/165C08G64/081G02B1/041C08L69/00
    • A copolycarbonate having a high refractive index, a small birefringence, high processability and excellent transparency and an optical lens formed from the copolycarbonate.The copolycarbonate has a total content of a unit represented by the following formula (I) and a unit represented by the following formula (II) of not less than 80 mol % based on the total of all the recurring units, the molar ratio of the unit represented by the formula (I) to the unit represented by the formula (II) being in the range of 98:2 to 35:65. (wherein each of R1, R2, R3 and R4 is independently a hydrogen atom, alkyl group having 1 to 20 carbon atoms or the like. X is an alkylene group having 2 to 8 carbon atoms or the like. Each of m and n is independently an integer of 1 to 10.) (wherein each of R5, R6, R7 and R8 is independently a hydrogen atom, alkyl group having 1 to 20 carbon atoms or the like.)
    • 具有高折射率,小双折射,高加工性和优异透明性的共聚碳酸酯和由共聚碳酸酯形成的光学透镜。 共聚碳酸酯的总含量以下述通式(I)表示的单元,下式(II)表示的单元相对于全部重复单元的总和为80摩尔%以上, 由式(I)表示的单元与由式(II)表示的单元的比例在98:2至35:65的范围内。 (其中R 1,R 2,R 3和R 4各自独立地为氢原子,碳原子数1〜20的烷基等,X为碳原子数2〜8的亚烷基等,m和n分别为 独立地为1〜10的整数。)(其中,R 5,R 6,R 7和R 8各自独立地为氢原子,碳原子数为1〜20的烷基等。