发明名称 OPTICAL FILM
摘要 It is an object of the present invention to provide an optical film which has reverse chromatic dispersibility that its retardation becomes smaller as the wavelength becomes shorter and a low photoelastic constant. The optical film is made of a polycarbonate copolymer containing a unit (A) represented by the following formula: wherein R1 and R2 are each independently a hydrogen atom, hydrocarbon group having 1 to 10 carbon atoms or the like, R3 and R4 are each independently a hydrocarbon group having 1 to 10 carbon atoms or the like, “m” and “n” are each independently an integer of 0 to 4, and “p” and “q” are each independently an integer of 0 or more, and a unit (B) represented by the following formula: wherein R5 to R8 are each independently a hydrogen atom or alkyl group having 1 to 10 carbon atoms, the (A/B) molar ratio of the unit (A) to the unit (B) is 10/90 to 90/10 and which satisfies the following expression (1): R(450)<R(550)<R(650)  (1) wherein R(450), R(550) and R(650) are retardation values within the plane of the film at wavelengths of 450 nm, 550 nm and 650 nm, respectively.
申请公布号 US2010104777(A1) 申请公布日期 2010.04.29
申请号 US20080452180 申请日期 2008.06.17
申请人 TEIJIN CHEMICALS, LTD., 发明人 MOTOYOSHI TETSUYA;ANDO MASATOSHI;UENO MAKOTO;NISHIJIMA AKIKO
分类号 C09K19/02;C08G65/38 主分类号 C09K19/02
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