Patent ID: 8852697
Filing Date: 2014-10-07
Classification: C08J,C08K,C08L,C09K,G02B,G02F

Abstract:
1. A cellulose acetate film comprising: a cellulose acetate having an acetyl substitution degree of 2.0 to 2.5; and at least one compound having a structure represented by Formula (1) and having a mixing ratio of a component exhibiting m=0:a component exhibiting m>0 of 45:55 through 0:100, a content of the compound being 5 to 15% by mass based on a mass of cellulose acetate, wherein G represents a residue of a mono- or di-saccharide, X wherein the compound represented by Formula (1) exhibits an average log P value of 7.5 or more, wherein an in-plane retardation Ro of the film defined by the following Equation (I) is in the range of 30 to 200 nm, and a thickness direction retardation Rt of the film defined by the following Equation (II) is in the range of 70 to 300 nm, and in the equations, nx is an in-plane refractive index in the slow axis direction of the film, ny is an in-plane refractive index in the fast axis direction perpendicular to the slow axis direction of the film, nz is a refractive index in the film thickness direction of the film, and d is a thickness (nm) of the film, wherein the cellulose acetate film comprises 5 to 15% by mass based on the mass of the cellulose ester of a compound represented by Formula (