Patent ID: 9156918
Filing Date: 2015-10-13
Classification: C08B

Abstract:
1. A non-random cellulose ester having; (i) a degree of substitution (“DS”) of less than 3.0; (ii) a degree of polymerization (“DP”) in the range of from about 5 to about 1,000; and (iii) a ΔE color difference of less than 30, said ΔE color difference being defined by the equation wherein a*, b*, and L* are CIE 1976 color space values, and wherein said AE color difference is determined between (a) a solution of 1.7 g of said non-random cellulose ester in 41.1 g of n-methylpyrrolidone and (b) neat n-methylpyrrolidone; wherein said non-random cellulose ester is a mixed cellulose ester comprising at least two different pendant acyl groups, wherein said two different pendant acyl groups are each individually selected from the group consisting of an acetyl group, a propionyl group and a butyryl group.