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Nimbin beta-CD wettable powder, nimbin micro-emulsion form and its production technology

A wettable powder, azadirachtin technology, used in biocides, biocides, animal repellants, etc., can solve the problems of easy and rapid decomposition, high environmental pressure, environmental pollution, etc. Effectiveness of validity period and reduction of production cost

Inactive Publication Date: 2006-12-27
重庆荣达建设(集团)有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the tonnage of domestic emulsifiable concentrate preparations is large, accounting for about 2 / 3 of the total preparations, and 100,000 tons of organic solvents are applied to farmland every year, thus putting a lot of pressure on the environment
Moreover, the drug effect of azadirachtin EC preparations is slow, and generally begins to take effect after 24 hours of application, which is quite different from the effect of "drug to insect death" expected by farmers.
[0003] Therefore, to solve the problems of environmental pollution by organic solvents in neem EC components, easy and rapid decomposition of azadirachtin under light, slow drug effect, and cost reduction, develop and produce a product with strong stability, long drug effect period, and insecticidal Azadirachtin preparations with fast speed and low cost have become a very urgent requirement in the current domestic and foreign markets

Method used

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  • Nimbin beta-CD wettable powder, nimbin micro-emulsion form and its production technology
  • Nimbin beta-CD wettable powder, nimbin micro-emulsion form and its production technology
  • Nimbin beta-CD wettable powder, nimbin micro-emulsion form and its production technology

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] 1. Process route

[0016] Such as figure 1 Shown is the process flow of azadirachtin β-CD inclusion compound:

[0017] (1) Using β-CD (cyclodextrin) inclusion technology, mix the original drug of azadirachtin with the CD diluent in a certain proportion, stir and mix thoroughly, then add a certain amount of water, stir and mix again→precipitate→collect Precipitation→drying→CD inclusion (odorless and non-volatile powdery solid). The production process is relatively simple, and commercially available CD crude products can be used for pesticide processing. Azadirachtin β-CD inclusion technology makes it a "molecular capsule", the purpose of which is to make azadirachtin have better stability and prolong the duration of action under sunlight.

[0018] Such as figure 2 Shown is the process flow of 0.5% azadirachtin β-CD wettable powder:

[0019] The 0.5% azadirachtin β-CD inclusion compound can be directly diluted with water and sprayed, in order to give the preparation...

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Abstract

A wettable powder of nimbin is prepared through including the raw nimbin with beta-CD (beta-dextrin) and adding wetting agent and dispersing in the inclusion compound. A microemulsion of nimbin is prepared from said wettable powder of nimbin and water as matrix through adding the surfactant with proper turbidity point and hydrophilic and lipophilic groups. Its advantages are high effect on improving the stability of nimbin, long effective period and low cost.

Description

1. Technical field [0001] The invention relates to a dosage form of a biological pesticide preparation and a production process thereof, in particular to a azadirachtin β-CD wettable powder, a azadirachtin microemulsion formulation and a production process thereof. 2. Background technology [0002] Azadirachtin is an internationally recognized broad-spectrum natural insecticide. Its function is mainly to achieve the control effect through insect refusal and inhibition of the growth and development of harmful insects. The active ingredient of neem seed extract is azadirachtin (Azadirachtin), which belongs to tetracyclic triterpenoids. Due to the relationship between physicochemical properties, it is easy to hydrolyze under acid and alkali conditions, and easy to decompose under light (according to R.C.Saxena et al. in "India The activity of neem seed oil against the rice leaf roller (Cnaphalocrocis medinalis)” mentioned that sunlight can rapidly reduce the antifeedant activi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N43/90A01N25/14A01P7/00
Inventor 祝荣秦森荣邓先明
Owner 重庆荣达建设(集团)有限公司
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