Solvent-Borne Antifouling Coatings with Ethoxylated Triglyceride Compatibility
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Solution Overview
Problem
Solvent borne antifouling coating compositions containing encapsulated biocides and polymeric complexes of multivalent metal cations and anions often experience instability due to incompatibility, leading to particle agglomeration.
Innovation Solution
A solvent borne coating composition comprising polymeric biocides with multivalent metal cations and anions, polymer-encapsulated biocides, and ethoxylated triglycerides, which are formulated to prevent agglomeration and enhance stability, using a method that includes mixing ethoxylated triglycerides with secondary ingredients before adding polymer-encapsulated and polymeric biocides.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a coating composition contains both encapsulated biocides and polymeric complexes of multivalent metal cations and anions, then the anti-fouling effectiveness is improved, but the composition stability deteriorates due to particle agglomeration
Solution Approach 1:
The patent introduces a compatibility agent as an intermediary substance to mediate between the encapsulated biocide particles and the polymeric complex. This compatibility agent prevents direct interaction between incompatible components, allowing both biocides to coexist stably in the coating composition while maintaining their anti-fouling effectiveness.
Solution Approach 2:
The patent modifies physical or chemical parameters of the coating composition, such as pH, ionic strength, or molecular weight of polymer components, to optimize the compatibility between encapsulated biocides and polymeric complexes. By adjusting these parameters, the composition maintains stability without compromising the anti-fouling performance of either biocide.
2Reliability
If multiple biocides are combined in a solvent borne coating, then the anti-fouling performance is enhanced, but the formulation complexity increases leading to incompatibility issues
Solution Approach 1:
The compatibility agent serves as a mediator that simplifies the formulation process by pre-resolving incompatibility issues between multiple biocides. This allows the formulation to achieve enhanced anti-fouling performance without proportionally increasing formulation complexity, as the compatibility agent handles the interactions between different biocide components.
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 stability and effectiveness in inhibiting marine fouling organisms, maintaining a dry film on submerged surfaces for extended periods without particle agglomeration, ensuring long-lasting anti-fouling performance.
Implementation Method 1
one or more ethoxylated triglyceride that has average number of moles of ethylene oxide units per mole of triglyceride molecules of 10 to 45
Data Source
AI summary
Provided is a solvent borne coating composition comprising (a) one or more polymeric biocide comprising multivalent metal cations and multivalent organic anions, (b) one or more polymer-encapsulated biocide, and (c) one or more ethoxylated triglyceride that has average number of moles of ethylene oxide units per mole of triglyceride molecules of 10 to 45. Also provided are a method of making such composition and a method of using such a composition.