申请人:Mitsubishi Chemical Corporation
公开号:EP2881771A1
公开(公告)日:2015-06-10
A transparent film obtained by molding a polycarbonate resin composition comprising 100 parts by weight of (A) a polycarbonate resin containing (a) a structural unit derived from a dihydroxy compound represented by the following formula (1) and (b) a structural unit derived from a dihydroxy compound having an ether ring, and from 0.1 to 10 parts by weight of (B) a resin having a composition different from that of the polycarbonate resin (A), with the absolute value of the difference in the glass transition temperature between the resin (B) and the polycarbonate resin (A) being 80°C or less and the absolute value of the difference in the refractive index being 0.02 or less, wherein in the transparent film, the ratio of the retardation measured at a wavelength of 450 nm to the retardation measured at a wavelength of 550 nm satisfies a specific formula.
一种通过模塑聚碳酸酯树脂组合物而获得的透明薄膜,该组合物包含 100 重量份的(A)聚碳酸酯树脂,其中含有(a)衍生自下式(1)代表的二羟基化合物的结构单元和(b)衍生自具有醚环的二羟基化合物的结构单元,以及 0.1 至 10 重量份的(B)树脂,其组成不同于聚碳酸酯树脂(A),树脂(B)与聚碳酸酯树脂(A)之间的玻璃化转变温度差的绝对值为 80°C 或更低,折射率差的绝对值为 0.02 或更低,其中在透明薄膜中,波长为 450 纳米时测得的延迟与波长为 550 纳米时测得的延迟之比满足特定的式子。