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Controlled release formulations for agrochemicals

A technology of inhibitors and herbicides, applied in the direction of application, biocide, animal repellent, etc., can solve the problem of undisclosed very fine particle coating

Pending Publication Date: 2021-04-23
BAYER AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] US5632102A describes a method of spraying drug particles, however the coating of very fine particles is not disclosed

Method used

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  • Controlled release formulations for agrochemicals
  • Controlled release formulations for agrochemicals
  • Controlled release formulations for agrochemicals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0444] All formulations are summarized in Table 12. In a typical synthesis, the active is first completely dissolved in a suitable solvent, see solution A in Table 12. The same solvent was used to completely dissolve the polymer, see solution B in Table 12. The ratio of polymer to active can be adjusted to adjust the release profile. The two organic solutions (solutions A+B) were combined and then added to the aqueous phase (see solution C). Subsequent high shear mixing produces an intermediate emulsion. Briefly, the "oil phase" was dispersed using rotor-stator high shear mixing (Ultra-Turrax, SN25-25F) at 10000 RPM for 300 seconds. The organic solvent of the resulting mixture was completely removed under vacuum to give a white dispersion. The dispersion can be further concentrated (ie, water removed) using a centrifugation-decantation step, resulting in final formulations B1-5 and B7-8 as described in Table 13. In order to increase the electrolyte content of Example B-5,...

Embodiment C-1 to C-11

[0501] Preparation for spouted bed spray: stabilization of active particles

[0502] Very fine actives may require additional stabilization to obtain a stable fluidized bed. 18.0g was grinded using a RetschGrindomix GM 300 blade grinder at 5000rpm 150 was mixed intimately with 600 g of fluopyram or 600 g of diflufenac for 3 minutes. prepared from this The particle size of the 150-fluopyram-mixture was determined to be d.10=2 μm; d.50=8 μm; d.90=24 μm. prepared from this The particle size of the 150-diflufenacil-mixture was determined to be d.10=0.8 μm; d.50=1.4 μm; d.90=5 μm.

[0503] Spraying in a spouted bed

[0504] Will 600g 150 Stabilized Fluopyram or 600g 150 Stabilized diflufenacil was loaded into a Glatt ProCell LabSystem equipped with a ProCell 5 spouted bed. The spray solution was either 5% or 10% polymer in a suitable solvent, see Table 19 for processing parameters. Adjust the spraying time (coating time) to obtain the target coating thickness. Use 90...

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Abstract

The present invention relates to encapsulated active compounds (actives / active ingredients / AI) produced by different methods with minimized / eliminated negative effects on the plant / enhanced biological compatibility while efficacy against pests is maintained.

Description

Technical field [0001] The present invention relates to encapsulated active compounds (active substances / active ingredients / AI) prepared by different methods which minimize / eliminate negative effects on plants (phytotoxicity) such that biocompatibility is enhanced while maintaining Effective against pests. Background technique [0002] Active ingredients can be formulated in various ways, where the nature of the active substance and the method of formulation can raise questions regarding the processability, stability, usability and efficacy of the preparation, as well as the negative effects of the active ingredient itself on the plant. [0003] Furthermore, some formulations are preferred over others for ecological and / or economic reasons. [0004] As mentioned above, some useful active substances exhibit undesirable effects on plants when applied, such as phytotoxicity, which leads to severe plant damage, leaf necrosis (also called halo effect), late emergence (shrinking)...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/28A01N25/34A01N43/40A01N43/80A01N51/00A01N25/02A01N25/04A01N25/10A01N25/18
CPCA01N25/28A01N43/40A01N43/80A01N25/10A01N25/14A01N25/34A01N43/50A01N25/26
Inventor A·艾德S·帕特洛H·艾格D·G·达夫M·奥斯滕多夫R·德克威尔D·乐
Owner BAYER AG