Herbicidal Composition Stability via Built-in Oil Adjuvant
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Solution Overview
Problem
Existing formulations of pinoxaden and fenoxaprop-p-ethyl herbicides face challenges due to chemical and physical instability, as well as incompatibilities with adjuvants, leading to poor biological efficacy and equipment blockages.
Innovation Solution
A liquid herbicidal composition comprising pinoxaden, fenoxaprop-p-ethyl, and a built-in oil-type adjuvant, specifically polypropylene glycol ethers, which enhances chemical and physical stability and improves technical performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pinoxaden is formulated with traditional adjuvants, then biological activity can be enhanced, but chemical and physical stability deteriorates
Solution Approach 1:
The patent introduces a specific oil-type adjuvant as an intermediary substance that mediates between pinoxaden and the formulation system. This adjuvant contains hydroxyl groups that form hydrogen bonds with pinoxaden, creating a stable complex that maintains both chemical stability and biological activity. The adjuvant acts as a bridge that resolves the incompatibility between the herbicide and traditional formulation components.
Solution Approach 2:
The patent changes the chemical parameters of the adjuvant by specifying compounds with particular hydroxyl group configurations (e.g., polypropylene glycol with specific molecular weights and hydroxyl values). By adjusting these chemical parameters, the formulation achieves optimal stability while maintaining herbicidal efficacy. The specific parameter ranges for the adjuvant are carefully controlled to prevent degradation.
2Reliability
If tank-mix adjuvants are applied with pinoxaden, then biological efficacy can be improved, but physical incompatibility increases leading to flocculation and equipment blockages
Solution Approach 1:
The patent merges the adjuvant function directly into the herbicide formulation by incorporating the oil-type adjuvant during manufacturing. This creates a unified stable emulsion that eliminates the need for separate tank-mix adjuvants. The combined formulation maintains physical stability during storage and application, preventing flocculation and equipment blockages while delivering full biological efficacy.
3Reliability
If built-in adjuvants are used to ensure correct dosage, then application reliability improves, but formulation stability becomes more difficult to achieve
Solution Approach 1:
The oil-type adjuvant serves as a chemical intermediary that stabilizes pinoxaden through hydrogen bonding. This chemical interaction creates a stable complex that can be reliably formulated at controlled concentrations. The adjuvant's specific chemical properties (hydroxyl groups, molecular weight range) enable it to mediate between the herbicide and the formulation matrix, ensuring both stability and accurate dosage delivery.
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 achieves high chemical and physical stability, along with improved biological efficacy, reducing the risk of equipment blockages and ensuring effective weed control in cereals.
Implementation Method 1
A liquid herbicidal composition comprising pinoxaden, fenoxaprop-p-ethyl, and a built-in oil-type adjuvant, specifically polypropylene glycol ethers, which enhances chemical and physical stability
Data Source
AI summary
A liquid herbicidal composition comprising pinoxaden, fenoxaprop-p-ethyl, and an adjuvant; wherein the adjuvant is a built-in oil-type adjuvant.