Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Pesticide micro-capsule granules and preparation method thereof

A technology of microcapsule granules and microcapsule suspensions, which is applied in the field of pesticide microcapsule granules and its preparation, can solve the problems of reduced decomposition rate of active ingredients, poor storage stability, poor chemical stability, etc. Dosage, good control and prevention effect, easy operation effect

Inactive Publication Date: 2011-06-22
联合国南通农药剂型开发中心 +1
View PDF3 Cites 73 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (3) The decomposition rate of active ingredients in the environment is greatly reduced after being wrapped in the capsule shell material;
[0011] (1) The stability of storage is not good, and it is easy to layer and bottom;
[0012] (2) Poor chemical stability;
[0013] (3) It is not easy to transport, and the packaging cost is high;
[0014] (4) The spray should be diluted when using, and more labor will be used

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Pesticide micro-capsule granules and preparation method thereof
  • Pesticide micro-capsule granules and preparation method thereof
  • Pesticide micro-capsule granules and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0066] The first step, the preparation of pesticide microcapsule suspension:

[0067] The existing pesticide microencapsulation technology mainly has three kinds of process routes:

[0068] The first is the route of interfacial polymerization, which usually uses isocyanate (TDI) or prepolymer (MDI) to react with polyamine or polyol to form the capsule shell material of polyurea resin.

[0069] The second one adopts the in-situ polymerization process route, generally adopts urea-formaldehyde prepolymer solution to form capsules, controls the process parameters such as the rate of acid addition, the way of acid addition, the temperature of aging, the speed of solution stirring, etc., and adjusts the pH range , Under the action of catalysis, polycondensation forms strong and impermeable microcapsules.

[0070] The third is the preparation process of complex coacervation. In the aqueous solution mixed with dissolved natural polymer materials (such as gelatin and gum arabic), the ...

Embodiment 1

[0085] Embodiment one: the formula component of Abamectin microcapsule suspension

[0086]

[0087] Disperse the former medicine of 30kg of insecticide Abamectin and 3kg of carrier white carbon black in 15kg of soybean oil (commercially available) and stir evenly (oil phase) through a sand mill until the average of the material The particle size reaches 2um~8um, then add 4kg of toluene diisocyanate TDI (Cangzhou Dahua TDI Co., Ltd.) and stir evenly (oil phase); then prepare the water phase: add 10kg of 10% polyvinyl alcohol PVA aqueous solution to 40kg of deionized water Stir well (water phase); put the prepared oil phase material into the water phase and turn on high-speed homogenization to form a stable O / W emulsion; turn on stirring (maintain 800 rpm), and then heat the homogenized emulsion to 70°C, maintain a stable solidification temperature of the capsule wall material for 3 hours, then add 0.1kg of PH regulator glacial acetic acid to adjust the pH value to about 7, a...

Embodiment 2

[0089] Embodiment two, alachlor microcapsule suspension formulation components

[0090]

[0091]The herbicide alachlor of 20kg is heated to molten state, adds the polyphenyl polymethylene polyisocyanate PAPI (Bayer company of Germany) of 2kg and the diphenylmethane diisocyanate MDI of 1kg (Yantai Wanhua Polyurethane Co., Ltd.) Stir evenly (oil phase); add 0.2kg of methylcellulose CMC to 50kg of deionized water, stir evenly (water phase) put the prepared oil phase material into the water phase and start high-speed homogenization to form a stable O / W emulsion; start stirring (maintain 400 rpm / min), then heat up the homogenized emulsion to 40°C, and slowly add 0.5kg of ethylenediamine at the same time to maintain a stable solidification temperature of the capsule wall material for 20 hours, and then add the emulsifier Wet agent NNO 3.0kg (Shanghai Tiantan Auxiliary Factory), dispersant sodium lignosulfonate (produced in Russia) 5.0kg, disintegrant modified starch 1.0kg, white...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Outer diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses micro-capsule granules and a preparation method thereof. The pesticide micro-capsule granules mainly comprise the following ingredients in percentage by weight: 5 to 75 percent of pesticide active ingredient, 1 to 10 percent of capsule wall material, 1 to 3 percent of wetting agent, 3 to 8 percent of dispersing agent, 0 to 10 percent of adjuvant and 10 percent of carrier filler. The preparation method comprises the following steps of: wrapping a micro-capsule by using active pesticide as a capsule core and using a high molecular material as a capsule shell material; preparing a micro-capsule suspending agent CS from water serving as a basic dispersant medium; and drying the micro-capsule suspending agent CS to prepare granules by using drying equipment to form a pesticide new formulation of the micro-capsule granules with control release effect. The invention has the advantages that: the pesticide micro-capsules are more environmentally-friendly and safer for a human body, have good control and prevention effects on targeted pests and are convenient to use.

Description

technical field [0001] The invention belongs to the field of pesticide formulation processing, and in particular relates to a pesticide microcapsule granule and a preparation method thereof. Background technique [0002] Microcapsules (Encapsulated Granule, CG) use polymer materials as the capsule wall or membrane, and wrap the pesticide active substance as the capsule core by chemical, physical or physicochemical methods to form a semi-permeable capsule. Microcapsules of the capsule, and solid particles formed by aggregating multiple microcapsules. The active substance in the capsule core is released slowly under controlled conditions to meet the requirements of suitable control effect. Microcapsules can be diluted with water and then sprayed, and diluted with water to form a suspension for use. The average particle size of the suspension can be in the range of 2-50 microns, which is a typical pesticide controlled release agent; at the same time, microcapsules can also be ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): A01N25/28A01N43/90A01N37/26A01N57/16A01P7/04A01P13/00B01J13/16
Inventor 曹雄飞仲苏林吴建兰曹新梅章东生
Owner 联合国南通农药剂型开发中心
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com