| 摘要 |
<p>METHOD FOR PREPARING OXIDIZED HYDROXYALKYL STARCH Oxidized hydroxyalkyl starch is prepared by the sequential steps of: (a) reacting granular starch with a 1, 2-alkylene epoxide containing 2 to 4 carbon atoms, inclusively, to obtain a hydroxyalkyl D of S of at least 0.02, and (b) oxidizing the hydroxyalkyl starch to introduce an amount of carboxylic groups onto said starch, the amount of carboxylic groups, basis percent by weight dry starch solids, being no greater than about 1.2 minus the product of 7 times the hydroxyalkyl D of S.</p> |
