Patent ID: 8455637
Filing Date: 2013-06-04
Classification: C08B

Abstract:
1. Cellulose acetate having a degree of acetyl substitution in the range of 2.636 to 2.958, wherein the cellulose acetate shows a distribution curve of an intermolecular substitution degree in which the maximum peak has a half width of less than Y defined in the following formula: in which X is the degree of acetyl substitution, and wherein the degrees of acetyl substitution at 2-, 3- and 6-positions satisfy the following formulas (I), (II), (III), and (VI): in which 2DS is the degree of acetyl substitution at 2-position; 3DS is the degree of acetyl substitution at 3-position; and 6DS is the degree of acetyl substitution at 6-position.