Patent ID: 8349921
Filing Date: 2013-01-08
Classification: C08B,C08J,C08K,C08L,G02B

Abstract:
1. An optical film made from a composition comprising: (a) a mixed cellulose ester having: (b) a plasticizer selected from the group consisting of xylitol pentaacetate (XPA), xylitol pentapropionate (XPP), arabitol pentapropionate (APP), a polyester comprising succinic acid residues and diethylene glycol residues, and a polyester comprising adipic acid residues and diethylene glycol residues, wherein the film has an optical retardation value in the thickness direction (R th ) of +50 to +130 nm measured at a film thickness of 80 μm or less and at a light wavelength of 633 nm.