MICROCAPSULE SUSPENSION-SUSPENDING AGENT CONTAINING ATRAZINE AND S-METOLACHLOR AND PREPARATION METHOD THEREFOR

摘要

A microcapsule suspension-suspending agent containing atrazine and s-metolachlor and a preparation method therefor. The method comprises: a. mixing a urea-formaldehyde resin prepolymer aqueous solution and s-metolachlor oil emulsion at a weight ratio of 1: (0.5-2) to obtain a first material; b. adjusting the pH of the first material to 5.0-6.5 to obtain a second material; c. adjusting the pH value of the second material to 2.5-4.5 to obtain a third material; d. subjecting the third material to curing polycondensation, and then adjusting the pH value of the material subjected to the curing polycondensation to be neutral and mixing with a first dispersant, a thickener, and antifreeze uniformly to obtain a fourth material; and e. after mixing the fourth material with an atrazine suspending agent, adding a second dispersant, and mixing uniformly. The preparation method significantly improves the storage stability of a microcapsule suspension-suspending agent containing atrazine and s-metolachlor and the control effect on weeds.