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    • 7. 发明授权
    • Aromatic polycarbonate, a method for producing the same, and a plastic
optical waveguide using the same
    • 芳香族聚碳酸酯,其制造方法和使用其的塑料光波导
    • US5599897A
    • 1997-02-04
    • US449996
    • 1995-05-25
    • Masaki NishiguchiToshimasa Tokuda
    • Masaki NishiguchiToshimasa Tokuda
    • C08G64/10G02B1/04C08G63/68G02B6/00
    • C08G64/10G02B1/046Y10T428/31507Y10T428/3154Y10T428/31663Y10T428/31721Y10T428/31855
    • There is provided an aromatic polycarbonate obtained by reacting a carbonate precursor substance with a dihydric phenol comprising mainly 2,2-bis(4-hydroxyphenol)-1,1,1,3,3,3-hexafluoropropane having specific characteristics. This aromatic polycarbonate has the following characteristics. That is, with respect to 5 wt % solution of the aromatic polycarbonate in methylene chloride, after being filtered through a filter having a pore diameter of 0.1 .mu.m, the light transmittance at 400 nm measured by using a quartz cell having an optical path length of 250 mm, is 85% or more in terms of light transmittance per cm of the polymer; and when 0.7 g of the aromatic polycarbonate is dissolved in 100 ml of methylene chloride, the specific viscosity of the thus obtained solution measured at 20.degree. C., is in the range of 0.160 to 0.418. The aromatic polycarbonate is excellent in heat resistance and transparency and good in moldability, and is suitable for a plastic optical waveguide that is small in transmission loss and excellent in heat resistance.
    • 提供了一种芳族聚碳酸酯,其通过碳酸酯前体物质与主要包含具有特定特征的2,2-双(4-羟基苯酚)-1,1,1,3,3,3-六氟丙烷的二元酚反应获得。 该芳族聚碳酸酯具有以下特征。 也就是说,相对于5重量%的芳族聚碳酸酯在二氯甲烷中的溶液,在通过孔径为0.1μm的过滤器过滤后,通过使用具有光程长度的石英池测量400nm处的透光率 为每立方厘米聚合物的透光率为85%以上; 当将0.7g芳族聚碳酸酯溶于100ml二氯甲烷中时,在20℃下测定的所得溶液的比粘度在0.160至0.418的范围内。 芳香族聚碳酸酯的耐热性和透明性优异,成型性好,适用于传输损耗小,耐热性优异的塑料光波导。