Patent ID: 7943761

Claim:
A cellulose-based composition for optical film fabrication, comprising: a first cellulose ester with the following structure: wherein n =500-800 with glucose as the monosaccharide unit, A l is —H or—C(O)A 4 , A 4 is alkyl or aryl, A 2 is —C(O)A 5 , A 5 is alkyl or aryl, A 3 is carbonate group or ester group; a second cellulose ester with the following structure: wherein n =500-800 with glucose as the monosaccharide unit, B 1 is —H or —C(O)B 4 , B 4 is alkyl or aryl, B 2 is —C(O)B 5 , B 5 is alkyl or aryl, B 3 comprises one of the groups consisting of: phosphinate group, phosphonate group, phosphonamide group, phosphate group, phosphoramide group, carbamate group; and a partially hydrolyzed cellulose ester with at least one hydroxyl group per monosaccharide unit.