Temperature-Stable Cloquintocet-Mexyl Aqueous Compositions
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Solution Overview
Problem
Aqueous suspension concentrate formulations of cloquintocet-mexyl are unstable at temperatures above 25 °C, leading to crystal growth and flocculation, and non-aqueous formulations have limited loading capabilities, higher manufacturing costs, and mediocre dilution properties and tank mix compatibilities.
Innovation Solution
Temperature-stable aqueous compositions are developed, incorporating hydrated cloquintocet-mexyl, a stabilizing surfactant such as tallowamine alkoxylate or cocoamine alkoxylate, and water, which are mixed with additional surfactants to form a suspension concentrate that is stable at elevated temperatures for extended periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If aqueous suspension concentrate formulations of cloquintocet-mexyl are formulated in an aqueous environment, then the loading capability and manufacturing cost are improved, but the formulation becomes unstable at temperatures of 25 °C and greater, resulting in crystal growth and flocculation
Solution Approach 1:
A non-ionic surfactant is introduced as an intermediary substance to mediate between the hydrated cloquintocet-mexyl crystals and the aqueous environment. The surfactant adsorbs at the crystal surface, forming a protective layer that prevents crystal growth and flocculation while maintaining the aqueous formulation's high loading capability and cost-effectiveness
Solution Approach 2:
The formulation utilizes temperature-dependent solubility parameters of the surfactant to maintain stability. The surfactant is selected and dosed to ensure adequate coverage of crystal surfaces across the operating temperature range, with the concentration and molecular structure optimized to provide steric stabilization that prevents aggregation at elevated temperatures
2Stability of the object's composition
If non-aqueous formulations such as oil dispersions and water dispersible granules are used, then the formulation stability is improved, but the loading capabilities are limited, manufacturing costs increase, and dilution properties and tank mix compatibilities deteriorate
Solution Approach 1:
The invention changes the fundamental parameter of the continuous phase from non-aqueous (oil) to aqueous, while compensating for stability concerns through careful selection of surfactant type and concentration. This parameter change enables higher loading capabilities and better environmental compatibility while maintaining stability through the surfactant-mediated protection mechanism
Solution Approach 2:
The formulation creates a composite system combining hydrated cloquintocet-mexyl crystals, aqueous continuous phase, and non-ionic surfactant. This composite structure leverages the benefits of each component: the aqueous phase provides high loading and compatibility, while the surfactant provides the stabilization normally associated with non-aqueous systems
Data Source
AI summary
Temperature stable aqueous compositions and methods for their preparation and use are described. The compositions can include cloquintocet-mexyl, a surfactant comprising a tallowamine alkoxylate, a cocoamine alkoxylate, or a combination thereof, and water.