Pyrethroid Granules via Silica Adsorption and Block Copolymer
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Solution Overview
Problem
Existing pesticide formulations, particularly those containing pyrethroid insecticides, face challenges with dustiness, flowability, and storage stability, and often require solvents that can be hazardous and volatile, limiting their concentration and application efficiency.
Innovation Solution
A non-dusty, free-flowing, storage-stable solid composition is achieved by combining silica and kaolin with a block copolymer of ethylene oxide and propylene oxide in specific ratios, eliminating the need for solvents and enabling high concentrations of liquid active ingredients in granular form, which enhances dispersibility and suspensibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If organic solvents are used in liquid formulations to achieve desired solubility and concentration of active ingredients, then the formulation can be diluted and applied effectively, but the formulation becomes flammable, toxic, and causes irritation to the human body
Solution Approach 1:
The invention extracts and eliminates the harmful organic solvent component from the formulation while retaining the active ingredient through alternative means (co-crystallization with inert solid carriers), thereby removing toxicity and flammability hazards
Solution Approach 2:
The invention changes the physical state parameter of the active ingredient from liquid (requiring organic solvents) to solid (co-crystallized form), which eliminates the need for flammable solvents while maintaining deliverability
2Ease of operation
If dry powdery composition is used to achieve easy application, then the formulation can be easily handled and diluted, but it causes dust formation, nozzle choking, sedimentation, and lumping during storage
Solution Approach 1:
The invention segments the active ingredient into micro-crystalline particles distributed within a solid matrix of inert carriers, creating a granular structure that prevents dust formation while maintaining ease of handling
Solution Approach 2:
The invention creates a composite material system combining the active ingredient with inert solid carriers (silica, kaolin, attapulgite) in a co-crystallized granular structure, which eliminates dustiness while preserving ease of operation
3Reliability
If liquid formulations with high concentration of pyrethroids are used to achieve effective pest control, then the formulation displays strong insecticidal activity, but it suffers from high volatility and flammability
Solution Approach 1:
The invention changes the physical state of the liquid pyrethroid active ingredient into a solid co-crystallized form, which dramatically reduces volatility and eliminates flammability while preserving insecticidal activity
Solution Approach 2:
The invention converts the harmful volatility and flammability characteristics of liquid pyrethroids into benefits by transforming them into a stable solid co-crystallized formulation that maintains effectiveness while eliminating safety hazards
4Shape
If granules are produced by conventional methods to achieve solid composition form, then the formulation can be applied to water surface or soil, but it requires organic solvents that are flammable and toxic
Solution Approach 1:
The invention extracts and removes the harmful organic solvent step from the granulation process, achieving granular formulation through direct co-crystallization of the active ingredient with inert solid carriers
Solution Approach 2:
The invention enables the active ingredient to self-organize into a stable granular co-crystallized structure with inert carriers without requiring external organic solvents, achieving both granular form and safety simultaneously
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 solution provides a stable, environmentally friendly, and cost-effective formulation with improved dispersibility and suspensibility, allowing for higher concentrations of pyrethroid insecticides without the risks associated with solvent use, ensuring effective application and reduced environmental impact.
Implementation Method 1
a non dusty, free flowing, storage stable solid composition comprising of at least one pesticide from pyrethroid class... brought about by a combination of inert ingredients silica and kaolin
Implementation Method 2
block copolymer of ethylene oxide and propylene oxide in specific proportions... improved properties of dispersibility and suspensibility
Data Source
AI summary
A solid water dispersible granular composition of pesticide comprising up to 50% of at least one pesticide from pyrethroid class, more particularly a highly viscous liquid pyrethroid insecticide, permethrin, having the properties of excellent dispersibility and suspensibility, as well as the process of preparation of the composition are disclosed. Also the improved storage stability, dispersibility and suspensibility properties are discussed for this granular composition.