Sulfonamide Herbicide Formulation Stability via Wetting Agent Selection
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Solution Overview
Problem
Herbicide formulations containing sulfonamides, particularly phenylsulfonylaminocarbonyltriazolinones, face challenges with chemical reactivity and storage stability, especially when using common wetting agents like alkyl sulfates and alkoxylates, which lead to instability and reduced effectiveness.
Innovation Solution
A solid, water-dispersible formulation incorporating phenylsulfonylaminocarbonyltriazolinones with naphthalenesulfonic acids and sulfosuccinic acid derivatives as wetting agents, along with other auxiliaries and safeners, to enhance stability and biological effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If common wetting agents like alkyl sulfates and alkoxylates are used in sulfonamide formulations, then the formulation has good applicability and user-friendliness, but the storage stability of the active ingredient deteriorates due to chemical degradation
Solution Approach 1:
The patent changes the chemical parameter (type of wetting agent) from conventional alkyl sulfates and alkoxylates to naphthalenesulfonic acid derivatives and sulfosuccinic acid derivatives. This parameter change resolves the contradiction by selecting wetting agents that are chemically compatible with sulfonamides, thereby maintaining both good applicability and high storage stability without causing hydrolysis or degradation of the active ingredient.
2Ease of operation
If conventional wetting agents are used to ensure good dispersibility and applicability, then the formulation is easy to use, but the chemical reactivity of sulfonamides increases leading to instability
Solution Approach 1:
The patent modifies the chemical composition parameter by replacing conventional wetting agents with naphthalenesulfonic acid derivatives and sulfosuccinic acid derivatives. These alternative wetting agents maintain the formulation's user-friendliness and dispersibility while being chemically inert toward sulfonamides, thus preventing unwanted reactions and ensuring reliable chemical stability during storage.
3Ease of manufacture
If standard auxiliaries and additives are used in the formulation, then the formulation has good processability and applicability, but the biological effectiveness of the herbicide is reduced due to instability
Solution Approach 1:
The patent changes the auxiliary component parameter by selecting naphthalenesulfonic acid derivatives and sulfosuccinic acid derivatives as wetting agents. These auxiliaries provide good processability and formulation characteristics while maintaining the biological effectiveness of sulfonamide herbicides by preventing chemical degradation, ensuring that the active ingredient remains stable and effective throughout storage and application.
Data Source
AI summary
The present invention relates to solid, storage-stable, water-dispersible formulations comprising one or more active herbicidal compounds from the group of the sulphonamides and their salts, one or more carrier materials, and one or more wetting agents from the group of the naphthalenesulphonic acids and the group of the sulphosuccinic acid derivatives and also the salts of these groups. The formulations of the invention are suitable for the crop protection sector.