摘要 |
A water-soluble sulfate ester of cellulose having a degree of substitution of about 0.3 to about 1.0 with a substantially uniform distribution of sulfate ester groups among the polymer units of the cellulose. A thickened aqueous medium containing water and said water-soluble sulfate ester of cellulose having a degree of substitution of about 0.3 to about 1.0.
|