Patent ID: 9062187
Filing Date: 2015-06-23
Classification: C08K,C08L,G02B

Abstract:
1. An optical film comprising: cellulose acetate α having a 6% viscosity of 70 to 250 mPa·s measured at 25° C. ±1° C. and an acetyl substitution degree of 2.0 or more but less than 2.5; cellulose acetate β having a 6% viscosity smaller than the 6% viscosity of cellulose acetate α, and an acetyl substitution degree of 2.0 or more but less than 2.5; ester compound C having one or more but twelve or less of at least one kind of a pyranose structure and a furanose structure, all of or a part of OH groups of the at least one kind of a pyranose structure and a furanose structure being esterified; and polyester D represented by following Formula (1), wherein B represents an arylcarboxylic acid residue, G represents an alkylene glycol residue having 2 to 12 carbon atoms, an aryl glycol residue having 6 to 12 carbon atoms, or an oxyalkylene glycol residue having 4 to 12 carbon atoms, A represents an alkylene dicarboxylic acid residue having 4 to 12 carbon atoms, or an aryl dicarboxylic acid residue having 6 to 12 carbon atoms, and n represents an integer of 1 or more.