STABLE LIQUID COMPOSITIONS AND METHODS FOR USING THEM

MX434432BActive Publication Date: 2026-05-19GOWAN COMPANY LLC
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Patent Information

Application Number
MX2021009954
Authority / Receiving Office
MX · MX
Patent Type
Patents
Current Assignee / Owner
Priority Date
2019-02-19
Filing Date
2021-08-18
Publication Date
2026-05-19
Estimated Expiration
2040-02-19

AI Technical Summary

Technical Problem

Existing liquid pesticide compositions, particularly those containing sulfonylurea herbicides, suffer from chemical instability, leading to unacceptable losses of greater than 5% (w/w) after storage at 40°C, which limits their commercial viability.

Method used

Formulating liquid pesticide compositions with specific diluents and surfactants that lack hydroxyl groups associated with electron-withdrawing functional groups, such as carbonyl, sulfonyl, or phosphonyl, and avoiding hydroxyl groups with pKa above 13, to stabilize pesticides like halosulfuron-methyl, ensuring less than 5% (w/w) loss after 8 weeks at 40°C.

Benefits of technology

The stabilized liquid pesticide compositions maintain at least 95% (w/w) of the active ingredient after 8 weeks at 40°C, enhancing their commercial stability and efficacy in controlling unwanted vegetation.

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Abstract

The present invention relates to a liquid pesticide formulation comprising: a) halosulfuron-methyl; b) one or more diluents, wherein the diluent(s) is a liquid comprising: i) a first carbon structure of at least six carbon atoms, the first carbon structure being a substituted or unsubstituted, saturated or unsaturated, linear or branched alkyl or heteroalkyl; ii) optionally one or more glyceryl, carbonyl, phenyl, sulfonyl, or phosphonyl groups in the first carbon structure; wherein if the first carbon structure of the diluent comprises a hydroxyl group or groups, the hydroxyl group or groups are adjacent to carbonyl, phenyl, sulfonyl, or phosphonyl groups;c) optionally one or more surfactants, wherein the one or more surfactants comprise: i) a second carbon backbone of at least six carbon atoms, wherein the second carbon backbone is a substituted or unsubstituted, saturated or unsaturated, linear or branched alkyl or heteroalkyl; ii) optionally one or more glyceryl, carbonyl, phenyl, sulfonyl, or phosphonyl groups on the second carbon backbone; d) wherein if the second carbon backbone of the surfactant comprises a hydroxyl group or groups, the hydroxyl group or groups are adjacent to carbonyl, phenyl, sulfonyl, or phosphonyl groups; one or more rheology modifiers; and e) optionally one or more buffers; wherein the liquid pesticide formulation exhibits 5% (w / w) or less loss of halosulfuron-methyl over storage for 8 weeks at 40°C as measured using quantitative chromatography.
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