Patent ID: 8597551
Filing Date: 2013-12-03
Classification: C08J,C08L,C09K,G02B,Y10T

Abstract:
1. An optical film using a base resin, a cellulose ester resin with a portion of hydrogen atoms of hydroxyl groups of cellulose being substituted with an acyl group of the following formula 1 and one or more substituent groups selected from formula 2, wherein a degree of substitution with the acyl group is 2.46 to 2.72, and a total degree of substitution with the substituent groups other than the acyl group is 0.11 to 0.54, wherein, X is a connection group selected from the group consisting of —CS—, —S—, —SO—, —SO R R alkyl, aryl, cycloalkyl, alkenyl, and aralkyl of R