Cellulose acetate and method for producing cellulose acetate
AssigneeDaicel Corporation
InventorsShuuji Yoshioka, Toshikazu Nakamura, Shu Shimamoto, Takao Kishimoto
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Abstract
The present invention is to provide a cellulose acetate that has a low total degree of acetyl substitution and a degree of acetyl substitution at 6-position that is lower compared to the degrees of acetyl substitution at 2-position and 3-position of a glucose ring, and has excellent water solubility. A cellulose acetate having: a total degree of acetyl substitution of 0.4 or greater and 0.9 or less, a proportion of a degree of acetyl substitution at 6-position in the total degree of acetyl substitution of 0% or greater and 18% or less, and a light transmittance at 660 nm of 5% or greater in 4 wt. % aqueous solution.
Claims17
A cellulose acetate having:
- a total degree of acetyl substitution of 0.4 or greater and 0.9 or less,
- a proportion of a degree of acetyl substitution at 6-position in the total degree of acetyl substitution of 18% or less and greater than 0%,
- a viscosity-average degree of polymerization of 3 or greater and 65 or less, and
- a light transmittance at 660 nm of 5% or greater in 4 wt. % aqueous solution.
Dependencies are inferred from the claim text.