Optical film, and polarizing plate and liquid crystal display device using same
    10.
    发明授权
    Optical film, and polarizing plate and liquid crystal display device using same 有权
    光学膜,偏光板及使用其的液晶显示装置

    公开(公告)号:US09151870B2

    公开(公告)日:2015-10-06

    申请号:US13883899

    申请日:2011-12-02

    Abstract: The purpose of the present invention is to provide an optical film having a large phase difference value, small moisture-induced fluctuation in the phase difference value, small photoelastic coefficient and excellent bondability with a polarizer. The optical film includes a cellulose ester (A) which satisfy formulae (1) and (2) below and a vinyl-based polymer (B). A content ratio of the cellulose ester (A) and the vinyl-based polymer (B) is from 95:5 to 50:50 by mass, the vinyl-based polymer (B) is composed of a non-aromatic vinyl-based monomer having a solubility parameter of 17.5 (MPa1/2) or larger and smaller than 20.0 (MPa1/2) and a weight average molecular weight of the vinyl-based polymer (B) is from 500 to 10,000: where 1.0≦X+ΣYi

    Abstract translation: 本发明的目的是提供一种相位差大的光学膜,相位差值的水分诱导波动小,光弹性系数小,与偏振片的粘接性优异。 光学膜包括满足下式(1)和(2)的纤维素酯(A)和乙烯基类聚合物(B)。 乙烯基类聚合物(B)由非芳香族乙烯系单体构成,其中,所述乙烯基系聚合物(B)的含量比例为95:5〜50:50, 溶解度参数为17.5(MPa1 / 2)或更大且小于20.0(MPa1 / 2),乙烯基类聚合物(B)的重均分子量为500至10,000:其中1.0&lt; lE; X +&Sgr ; Yi <2.0公式(1)4.0&nlE; 2×X +&Sgr(ni×Yi)<6.0。 公式(2)

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