| 摘要 |
<p>This patent describes preparation of sodium and potassium salt closed to crosslinked (4-0-methyl-alpha-D-glucorono)-beta- -D-xylan related to principal structural formulas (I), (II) or (III) with a substitution degree 0,1 up to 2,2 so that, (4-0- -methyl-alpha-D-glucoron)-beta-D-xylan is being activated in potassium or sodium hydroxide water solution, for 5 minutes up to 2 hours, at the temperature of 10 up to 30 Celsius degrees and it is being modified by 1-chloro-2,3-epoxypropane subsequently at the temperature 10 up to 30 Celsius degrees for 15 minutes up to 4 hours, while the weight ratio related to (4-0-methyl-alpha-D- -glucorono)-beta-D-xylane, solvent and 1-chloro-2,3-epoxypropane is 1 : 15 up to 25 : 5 up to 10.</p> |
