6results about How to "Improved controlled release" patented technology

The present disclosure relates to a controlled release coated fertilizer product comprising a core of fertilizer particles and a coating of a readily biodegradable component and a natural polymer. The envelope comprises an inner layer comprising lignin and a hydrophobic outer layer. The present disclosure also relates to a method of making a coated fertilizer product, and the use of the coated fertilizer for controlled release of nutrients in agriculture.

The invention discloses traditional Chinese medicine nano hydrogel for treating recurrent oral ulceration as well as a preparation method and application of the traditional Chinese medicine nano hydrogel, and belongs to the technical field of medicines. According to the preparation method disclosed by the invention, the modified daochiSan is introduced into hydrogel prepared from sodium alginate and chitosan to prepare the modified daochiSan iron nano composite hydrogel (FeNPs at DaochiSan hydrogel), and the hydrogel has the characteristics of high mechanical strength, strong stability, high swelling ratio, long adhesion time, oxidation resistance, biocompatibility and the like; by improving the bioavailability, the stability, the targeting property and the controlled release property of the medicine, the compliance of a patient is improved, the treatment effect is improved, and a new way is provided for the inheritance and the application of the traditional modified Daochi powder.

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.

A controlled-release coated compound fertilizer prepared from wine lees comprises compound fertilizer particles containing wine lees and a controlled-release coating on the surface, wherein the controlled-release coating is prepared from ethyl cellulose, hydroxypropyl cellulose, glycerol, urea and water to form a controlled-release coating on the surface of the compound fertilizer particles by spraying. The present invention discloses a controlled-release coated compound fertilizer prepared from wine lees, which adopts a core skeleton slow-release combined with a controlled-release coating. After fertilization and watering, the slow-release effect of the skeleton and the slow-release of the coating solve the problem that wine lees compound fertilizer is difficult to achieve slow-release and the slow-release of the coating is difficult to regulate, and the slow release of nutrients in the white wine wine lees compound fertilizer is achieved. The entire release cycle can reach 15 months, which can ensure the entire growth process of the plant. Only one fertilization can achieve the effect of three topdressings in the past, greatly reducing the amount of fertilizer and labor costs.

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.

The invention discloses a preparation method of a membrane-controlled sustained and controlled release preparation, and relates to the technical field of sustained and controlled release preparations, ethyl cellulose EC, medium-chain fatty acid and monounsaturated fatty acid are subjected to hot melt extrusion to obtain a mixed material, the mixed material reacts with a volatile solvent, ammonia water or an ammonium compound to obtain an EC aqueous dispersion, and purified water is added for dilution to obtain an EC coating solution; a water chestnut sugar-coating pot is used for coating, and the prepared EC film-controlled sustained and controlled release preparation has excellent controlled release performance and good appearance characteristics, can gradually and slowly release effective components of medicines, is stable in release curve, remarkably improves the use effect of the medicines and the compliance of patients, and has important application value and market prospect.