Clopyralid Herbicide Salt Mixture Stability
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Solution Overview
Problem
The stability of picolinic acid herbicide amine salts, particularly at high concentrations, is a challenge due to the formation of crystalline deposits at low temperatures, limiting storage and handling capabilities.
Innovation Solution
A mixture of monomethylamine (MMA) and dimethylamine (DMA) salts of clopyralid in a specific molar ratio (70% - 90% DMA to 30% - 10% MMA) enhances the stability of clopyralid herbicide solutions, allowing for higher loadings and preventing crystalline deposits during cold storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If high concentrations of amine salt compositions are used, then the loading of active ingredient is improved, but the stability of the solution deteriorates due to crystalline deposit formation at low temperatures
Solution Approach 1:
The patent combines monomethylamine salt and dimethylamine salt of clopyralid in a specific molar ratio (1:4 to 4:1) to create a mixed salt composition. This merging of two different amine salts resolves the technical contradiction by preventing crystalline deposit formation while maintaining high active ingredient loading concentrations, achieving both high quantity of substance and solution stability simultaneously
Solution Approach 2:
The invention creates a composite amine salt system comprising both monomethylamine and dimethylamine salts of clopyralid. This composite material approach allows the formulation to exhibit enhanced stability properties that neither individual salt possesses alone, enabling high concentration formulations that remain stable during low temperature storage
2Productivity
If high concentrations of amine salt compositions are used, then the productivity is improved, but the ease of operation deteriorates due to handling difficulties of unstable formulations
Solution Approach 1:
By merging monomethylamine and dimethylamine salts in a specific molar ratio, the formulation achieves both high productivity through increased active ingredient loading and improved ease of operation through enhanced solution stability that prevents crystallization during handling and storage
Solution Approach 2:
The invention changes the chemical composition parameters by introducing a mixed amine salt system with specific molar ratios. This parameter change transforms the formulation from one that crystallizes at high concentrations to one that remains stable and easy to handle while maintaining high productivity
Data Source
AI summary
A herbicidal concentrate composition comprising a mixture of the monomethylamine and dimethylamine salts of at least one picolinic acid herbicide of formula (Ia): wherein X2 is selected from hydrogen and amino.