Emulsifiable Granule Formulation via Extrusion
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Solution Overview
Problem
Conventional crop protection formulations, such as liquid emulsifiable concentrates and solid granules, face issues like high organic solvent content, handling difficulties, dust hazards, and lower biological activity, leading to inadequate application and environmental concerns.
Innovation Solution
The method involves emulsifying water with a pesticide solution in a water-insoluble solvent, contacting the emulsion with a solid dispersant containing a water-soluble polycarboxylate and anionic surfactant, and extruding the resulting paste to form emulsifiable granules that rapidly emulsify upon dilution, improving handling and biological activity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If liquid emulsifiable concentrates are used to achieve ease of application, then handling is simplified, but organic solvent content increases to harmful levels
Solution Approach 1:
The patent changes the physical state parameter of the formulation from liquid to solid granules, while maintaining the emulsifiable property. This allows the product to be handled as a solid (reducing solvent content) but still form an emulsion when mixed with water (maintaining ease of application). The granules contain the pesticide dissolved in a water-insoluble solvent, which is then emulsified upon contact with water during application.
Solution Approach 2:
The patent creates a composite formulation combining the pesticide, water-insoluble solvent, water-soluble dispersant, and anionic surfactant in a solid granule matrix. This composite structure allows the product to exhibit both solid handling characteristics and liquid-like emulsification behavior when applied, resolving the contradiction between ease of application and harmful solvent content.
2Object-generated harmful factors
If solid granules are used to reduce organic solvent content, then environmental harm is reduced, but handling and measurement difficulties increase
Solution Approach 1:
The patent makes the solid granules dynamically emulsifiable - they transition from a solid handled state to an emulsified liquid state during application. The granules are designed to rapidly emulsify when mixed with water, transforming their physical state to improve handling and application characteristics while maintaining low solvent content in the stored product.
Solution Approach 2:
The patent utilizes the change in physical state parameter upon contact with water. The granules remain as handleable solids during storage and transport, but rapidly transform into an emulsified liquid mixture during application, solving the handling difficulties of conventional solid formulations while maintaining environmental benefits.
3Object-generated harmful factors
If conventional solid formulations are used to reduce solvent content, then environmental impact is reduced, but biological activity decreases
Solution Approach 1:
The patent performs preliminary emulsification by pre-mixing the pesticide with the water-insoluble solvent and dispersant in the granule structure. When the granules contact water during application, the emulsion forms rapidly and uniformly, ensuring consistent biological activity without requiring sophisticated mixing at the application site. This preliminary preparation maintains high biological activity while using environmentally friendly solid formulation.
4Productivity
If rapid emulsification is achieved through sophisticated formulation, then application effectiveness is improved, but formulation complexity increases
Solution Approach 1:
The patent achieves rapid emulsification by optimizing the physical and chemical parameters of the formulation components - specifically using a water-insoluble solvent with appropriate solubility characteristics and a water-soluble dispersant with specific molecular weight and functional groups. These parameter optimizations enable fast emulsification without requiring complex formulation structures or multiple additives.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The emulsifiable granules provide rapid emulsification, better handling characteristics, reduced organic solvent content, and enhanced biological activity, addressing the limitations of conventional formulations while being environmentally sustainable.
Implementation Method 1
contacting the emulsion resulting from step a) and a solid dispersant containing a water-soluble polycarboxylate and a water-soluble anionic surfactant
Implementation Method 2
c) extruding the paste resulting from step b)
Data Source
AI summary
The present invention relates to a method for preparing an emulsifiable granule comprising the steps of a) emulsifying water with a solution of a pesticide in a water-insoluble solvent, b) contacting the emulsion resulting from step a) and a solid dispersant containing a water-soluble polycarboxylate and a water-soluble anionic surfactant, and c) extruding the paste resulting from step b). The invention further relates to emulsifiable granules containing a water-insoluble solvent, a pesticide, which is dissolved in the water-insoluble solvent, a water-soluble polycarboxylate, and a water-soluble anionic surfactant.