2results about How to "Improved controlled release" patented technology

The invention provides a spirotetramat polyurethane / polyurea microcapsule suspending agent as well as a preparation method and application thereof, and belongs to the technical field of pesticide preparations. The preparation method comprises the following steps: mixing an oil-phase solution containing spirotetramat raw medicine and polyisocyanate with a water-phase solution containing an emulsifier and a dispersant, carrying out shear emulsification, adding a water-soluble wall material monomer water solution containing polyamine and / or polyol, and carrying out an interfacial polymerization reaction; after the polymerization is finished, sequentially carrying out curing treatment and cooling, then adding an auxiliary agent, and blending to obtain the spirotetramat polyurethane / polyurea microcapsule suspending agent. The spirotetramat microcapsule suspending agent is prepared through an interfacial polymerization method, spirotetramat is coated in a polyurethane or polyurea capsule wall, and the spirotetramat microcapsule suspending agent has the advantages of being high in encapsulation efficiency, good in physical and chemical stability, long in pesticide effect lasting period, safer to non-target organisms (such as bees) and the environment and the like. The preparation method is stable in process, easy for industrial production and excellent in product performance.

The application provides a bio-based compound fertilizer synergist and a preparation method thereof. Through aspartic acid-lysine-metal chelate compound modification and a secondary granulation method, the nutrient controlled release effect is more optimal, and the synergist and the microelement supplement are combined; the seaweed extract can activate the expression of crop stress resistance genes, and the combination of gamma-aminobutyric acid and spermidine can repair the soil and crop microecology, and the crop growth and soil conservation are considered.