Polyaminoamide Dispersants for High-Electrolyte Agrochemical Stability
Solution Overview
Problem
Conventional dispersants fail to maintain stability and prevent agglomeration/flocculation in high-electrolyte solutions, leading to ineffective application and equipment blockage in agricultural formulations, particularly when combining water-insoluble solid active ingredients with electrolyte solutions.
Innovation Solution
Polyaminoamide resins and their derivatives are used as dispersants, providing improved dispersibility and suspensibility in high-electrolyte solutions, obtained through thermal condensation of poly-functional fatty acids with poly-functional amines, and further modified via alkoxylation, glycidation, or carbamation reactions, to create stable suspensions without particle agglomeration or flocculation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional dispersants (ethylene oxide/propylene oxide block copolymers, lignosulfonates, etc.) are used in high-electrolyte solutions, then dispersion is achieved in non-electrolyte solutions, but particle agglomeration and flocculation occur in high-electrolyte solutions
Solution Approach 1:
The patent changes the chemical parameters of the dispersant by using polyaminoamide resins with specific molecular structures (containing amine and amide groups) that can interact with electrolyte ions. This chemical parameter change enables the dispersant to maintain effectiveness in high-electrolyte environments where conventional dispersants fail, preventing agglomeration and flocculation while maintaining dispersion stability.
Solution Approach 2:
The patent employs polyaminoamide resins as composite dispersant materials that combine multiple functional groups (amine, amide) within a single molecular structure. These composite materials provide both electrostatic stabilization (through amine groups interacting with ions) and steric stabilization (through the polymer backbone), enabling effective dispersion in high-electrolyte solutions where single-function dispersants fail.
2Reliability
If large amounts of lignosulfonates are used to obtain stable dispersion in high-electrolyte solutions, then dispersion stability is improved, but the cost of the dispersion increases
Solution Approach 1:
The patent changes the efficiency parameter of the dispersant by using polyaminoamide resins with optimized molecular weights and functional group densities. These parameter-optimized dispersants achieve effective stabilization at lower concentrations compared to lignosulfonates, reducing the quantity of dispersant required while maintaining dispersion stability in high-electrolyte solutions.
3Ease of operation
If conventional dispersants are used to suspend water-insoluble solid active ingredients, then homogenous dispersion is achieved initially, but settling, agglomeration or flocculation occurs during storage
Solution Approach 1:
The patent applies polyaminoamide resins that provide preliminary electrostatic and steric protection to particles during the dispersion process. This preliminary action of coating and stabilizing particles prevents subsequent settling, agglomeration, or flocculation during storage, maintaining composition stability while ensuring easy initial dispersion.
Solution Approach 2:
The patent uses polyaminoamide resins as composite dispersants that provide dual stabilization mechanisms (electrostatic and steric) simultaneously. This composite approach ensures both easy initial dispersion and long-term storage stability, preventing the settling and agglomeration that occur with conventional single-mechanism dispersants.
4Ease of manufacture
If solid formulations (WP, WG) are used instead of liquid formulations (SC), then loading delivery and occupational health and safety are improved, but not all agrochemicals can be formulated into solid formulations
Solution Approach 1:
The patent develops polyaminoamide resin dispersants with universal applicability to both liquid (SC) and solid (WP, WG) formulations. These multi-functional dispersants can be used across different formulation types and are particularly effective in high-electrolyte solutions, enabling broader formulation versatility while maintaining effectiveness for agrochemicals that cannot be formulated as solids.
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 use of polyaminoamide resins and derivatives ensures a homogenous, stable dispersion of water-insoluble active ingredients in high-electrolyte solutions, maintaining stability during storage and application, with potential adjuvancy properties enhancing the biological effect of active ingredients.
Implementation Method 1
The use of polyaminoamide resins and derivatives as dispersants provides improved dispersibility and suspensibility in high-electrolyte solutions
Implementation Method 2
Polyaminoamide resins and their derivatives are used as dispersants, providing improved dispersibility and suspensibility in high-electrolyte solutions
Implementation Method 3
obtained through thermal condensation of poly-functional fatty acids with poly-functional amines
Implementation Method 4
further modified via alkoxylation, glycidation, or carbamation reactions
Implementation Method 5
further modified via alkoxylation, glycidation, or carbamation reactions
Implementation Method 6
further modified via alkoxylation, glycidation, or carbamation reactions
Data Source
AI summary
Embodiments of the present invention disclose a composition of an electrolyte solution comprising a water-soluble active ingredient; a water-insoluble solid active ingredient; and a dispersant that consists of a polyaminoamide resin, a polyoxyalkylene derivative thereof, a polyglycerol derivative thereof, a polycarbamate derivative thereof and a combination thereof.