Polycarbonate for making extruded films that are virtually free of surface defects
    2.
    发明授权
    Polycarbonate for making extruded films that are virtually free of surface defects 有权
    用于制造实际上没有表面缺陷的挤出薄膜的聚碳酸酯

    公开(公告)号:US08084570B2

    公开(公告)日:2011-12-27

    申请号:US11977586

    申请日:2007-10-25

    IPC分类号: C08G64/00

    摘要: Linear polycarbonate resin virtually free of surface defects that impair the suitability of the resin for demanding optical application is disclosed. Also disclosed is a process for the manufacture of the resin. The surface defects included in the resin are in the form of transparent fluorescing particles, the particle count of which portion that are 15 and 250 μm in size, is up to 1.8 counts/g, said count being determined by exciting the residue remaining after filtering a solution of said polycarbonate in methylene chloride through a Teflon filter of 5 μm pore size at a wavelength of 400-440 nm, 25× overall magnification and illumination time of 40 millisec. The polycarbonate is suitable for making films of improved optical properties.

    摘要翻译: 公开了实质上没有表面缺陷的线性聚碳酸酯树脂,其损害了用于要求光学应用的树脂的适用性。 还公开了用于制造树脂的方法。 包含在树脂中的表面缺陷是透明荧光颗粒的形式,其尺寸为15和250μm的部分的颗粒数量达到1.8个计数/ g,所述计数通过激发过滤后剩余的残余物来确定 所述聚碳酸酯在二氯甲烷中的溶液通过孔径为5μm的Teflon过滤器,波长为400-440nm,总体放大倍数为25×,照射时间为40毫秒。 聚碳酸酯适用于制备改善光学性能的薄膜。