Aqueous CMI Microbicide Composition With Organic Stabilization
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Solution Overview
Problem
Existing microbicides like 5-chloro-2-methyl-4-isothiazolin-3-one (CMI) are unstable in water, prone to decomposition, and their stabilization with metal salts or halides leads to emulsion shock, environmental concerns, and increased costs, necessitating a stable, cost-effective, and environmentally friendly alternative.
Innovation Solution
A microbicide composition comprising CMI, 2,2,6,6-tetramethylpiperidin-1-oxyl as a stabilizer, and a hydrophilic solvent, which stabilizes CMI without causing emulsion shock and maintains microbicidal efficacy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If CMI is prepared as an aqueous solution formulation, then it can be applied to microbicide uses, but it decomposes and becomes unstable
Solution Approach 1:
The patent introduces a stabilizer as an intermediary substance that mediates between CMI and water. The stabilizer prevents direct decomposition of CMI in aqueous environment by forming a protective interaction, allowing CMI to remain stable in water-based formulations without requiring organic solvents or complex emulsion systems.
Solution Approach 2:
The patent changes the chemical parameters of the aqueous solution by adjusting pH levels and adding specific stabilizing agents. By controlling the pH and introducing stabilizers that interact with CMI, the decomposition rate is reduced and stability is enhanced while maintaining water as the primary solvent.
2Stability of the object's composition
If metal salts like magnesium nitrate are added to stabilize CMI, then storage stability improves, but emulsion shock occurs and environmental harm increases
Solution Approach 1:
The patent extracts and eliminates harmful metal salt stabilizers from the formulation. Instead of using magnesium nitrate or other metal salts that cause emulsion shock and environmental pollution, the invention uses alternative stabilizing mechanisms based on pH control and organic stabilizers that do not interfere with emulsion stability or harm the environment.
Solution Approach 2:
The patent replaces expensive and harmful metal salt stabilizers with cheaper, environmentally benign alternatives. The new stabilizer system uses readily available organic compounds and pH adjustment agents that are less costly and do not require special disposal procedures, making the formulation more sustainable.
3Reliability
If halides like bromate are added to stabilize CMI, then microbicidal action is enhanced, but mutagenic effects and cost increase
Solution Approach 1:
The patent converts the potential harm of over-stabilization into benefit by using mild stabilizers that provide sufficient stability without excessive chemical reactivity. The stabilizers are chosen to prevent CMI decomposition while avoiding the formation of mutagenic byproducts, thus converting the risk of harmful side reactions into a safe and effective formulation.
Solution Approach 2:
The patent replaces expensive halide-based stabilizers with cheaper, non-mutagenic alternatives. The new stabilizer system uses cost-effective organic compounds that provide adequate stability without the need for hazardous bromate or other halides, reducing both cost and environmental risk.
4Stability of the object's composition
If a large amount of magnesium nitrate is used to stabilize CMI, then sufficient stabilization is achieved, but product cost increases
Solution Approach 1:
The patent optimizes the concentration and type of stabilizers to achieve maximum stabilization efficiency at minimum cost. By adjusting pH and using highly effective organic stabilizers, the formulation achieves sufficient CMI stability with much lower stabilizer concentrations than metal salt-based systems, reducing material costs and improving economic viability.
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 effectively stabilizes CMI, preventing decomposition and maintaining microbicidal action, while being free of harmful substances and avoiding emulsion shock, thus applicable to a wide range of industrial applications.
Implementation Method 1
it was found that water and/or a hydrophilic organic solvent is used as a solvent and a small amount of 2,2,6,6-tetramethylpiperidin-1-oxyl is blended to exert a remarkable CMI stabilization effect
Implementation Method 2
5-chloro-2-methyl-4-isothiazolin-3-one is widely used because it exhibits a microbicidal action against a wide range of microorganisms
Implementation Method 3
microbicides (ZONEN-C, manufactured by Chemicrea; KATHON WT, manufactured by Dow DuPont), in which magnesium nitrate and magnesium chloride are blended to store and stabilize CMI in an aqueous solvent
Implementation Method 4
the emulsion phase is broken due to the presence of a metal salt such as a magnesium salt, and as a result of which phase separation and/or coagulation occurs
Data Source
AI summary
Provided is a microbicide-containing aqueous composition having a superior effect of stabilizing 5-chloro-2-methyl-4-isothiazolin-3-one. This microbicide composition includes: (A) 5-chloro-2-methyl-4-isothiazolin-3-one; (B) 2,2,6,6-tetramethylpiperidin-1-oxyl; and (C) at least one solvent selected from the group consisting of water and a hydrophilic organic solvent.