Agrochemical Composition Fluidity Stability
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Solution Overview
Problem
Agrochemical compositions containing water-soluble active compounds face issues with particle growth and phase separation, especially at high concentrations, leading to reduced fluidity and stability during high temperature storage.
Innovation Solution
An agrochemical composition comprising a water-soluble agrochemically active compound, a polyhydric alcohol, a formalin condensate of sodium alkylnaphthalenesulfonate or modified styrene-maleic anhydride copolymer, a thickener, silica, and water, with specific mass ratios to maintain fluidity and prevent phase separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a water-soluble agrochemically active compound is used at a high concentration in a flowable formulation, then the effectiveness of the agrochemical is improved, but the dispersed particles gradually increase in size leading to reduced fluidity and phase separation
Solution Approach 1:
A dispersant is introduced as an intermediary substance to mediate between the water-soluble agrochemically active compound and water. The dispersant adsorbs onto the surface of dispersed particles, providing steric or electrostatic repulsion that prevents particle aggregation and maintains stable dispersion even at high concentrations (10-40% by mass) during high temperature storage.
Solution Approach 2:
The formulation uses a composite approach by combining multiple components including the water-soluble agrochemically active compound, dispersant, thickener, and adjuvants in specific ratios. This composite formulation creates a synergistic effect where the dispersant and thickener work together to maintain particle stability and prevent phase separation at high active ingredient concentrations.
2Quantity of substance
If the concentration of water-soluble agrochemically active compound is increased to improve effectiveness, then the agrochemical performance is enhanced, but particle growth and precipitation occur
Solution Approach 1:
The dispersant acts as a mediator that selectively adsorbs onto agrochemically active compound particles, forming a protective interface layer. This prevents direct particle-particle contact and aggregation, maintaining reliable particle size distribution even when the agrochemically active compound concentration is increased to 10-40% by mass.
Solution Approach 2:
The formulation adjusts physical parameters including pH, ionic strength, and temperature stability by incorporating buffers and electrolytes. These parameter changes optimize the electrostatic or steric stabilization mechanism of the dispersant, ensuring reliable particle size control across varying storage conditions including high temperature environments.
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 composition effectively maintains favorable fluidity and prevents phase separation even at high temperatures, ensuring stability and performance of the agrochemical active compound.
Implementation Method 1
a polyhydric alcohol (component (B))
Implementation Method 2
due to repetition of dissolution in water and precipitation from water of the water-soluble agrochemically active compound, the size of the dispersed particles gradually increases
Implementation Method 3
a formalin condensate of sodium alkylnaphthalenesulfonate, or a modified styrene-maleic anhydride copolymer (component (C))
Implementation Method 4
a thickener (component (D))
Implementation Method 5
silica (component (E))
Data Source
AI summary
A composition including: (A) an aqueous agrochemically active compound such as acetamiprid; (B) a polyhydric alcohol; (C) a formalin condensate of sodium alkylnaphthalenesulfonate, or a modified styrene-maleic anhydride copolymer; (D) a thickener such as xanthan gum; (E) at least one inorganic particle selected from the group consisting of silica, montmorillonite and attapulgite; and (F) water.