| 摘要 |
Water-soluble phosphate esters of guar gum are prepared by mixing the guar with an aqueous solution of a sodium salt of phosphoric acid having a pH of about 5 to about 7, drying the mixture to a moisture content of about 5 to about 12 percent, and heating the mixture in a closed chamber at a temperature of about 150 DEG C to about 180 DEG C for about 1 to 5 hours. |
