Antimicrobial Building Panels Using Modified Silicate Particles
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Solution Overview
Problem
Existing antibacterial and antifungal coatings for building materials require high amounts of additives, leading to increased costs and negative impacts on aesthetics and environmental stability, while also posing environmental concerns.
Innovation Solution
A coating composition incorporating modified silicate particles, such as aluminum silicate and magnesium silicate, with quaternary ammonium salts, which provides effective antibacterial and antiviral properties without compromising stability or aesthetics, and minimizes environmental impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If standard antibacterial and antifungal additives are used in coating compositions, then protective performance against microbes is improved, but the amount of additives required increases cost and negatively impacts aesthetic and stability properties
Solution Approach 1:
The patent modifies the physical and chemical parameters of silicate particles by coating them with quaternary ammonium salts, transforming inert fillers into active antimicrobial agents. This parameter change allows achieving protective performance with much lower additive quantities compared to conventional coatings.
Solution Approach 2:
The invention creates a composite material system combining silicate particles (alumina silicate, magnesia silicate) with quaternary ammonium salts. This composite structure provides both the protective antimicrobial function and maintains coating stability and aesthetics, resolving the contradiction between effectiveness and additive quantity.
2Reliability
If large amounts of antibacterial and antifungal additives are used to achieve sufficient protective activity, then protective performance is improved, but aesthetic properties and environmental stability are negatively affected
Solution Approach 1:
By changing the form factor of quaternary ammonium salts from free-floating molecules to particle-coated formulations, the patent achieves sustained release and reduced leaching into the environment. This parameter modification maintains protective activity while improving environmental stability.
Solution Approach 2:
The silicate particles act as intermediaries carrying the quaternary ammonium salts, providing a controlled interface between the active antimicrobial agent and the environment. This intermediary structure reduces direct environmental exposure while maintaining protective function.
3Reliability
If high concentrations of biocides are applied to surfaces, then antimicrobial efficacy is improved, but aesthetic appearance and coating stability deteriorate
Solution Approach 1:
The patent changes the delivery mechanism of quaternary ammonium salts from bulk solution to particle-bound formulations, enabling high local concentration at the particle surface for efficacy while maintaining low overall concentration for aesthetics. This parameter change resolves the contradiction between antimicrobial efficacy and visual appearance.
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 coating composition effectively reduces microbial, fungal, and viral exposure on surfaces while maintaining stability and aesthetic value, and minimizing environmental harm.
Implementation Method 1
silicate particles which have been modified to have absorbed thereon a quaternary ammonium salt
Data Source
AI summary
Described herein is a coating comprising a binder, a pigment, and an antimicrobial composition which comprises particles selected from the group consisting of an aluminum silicate, a magnesium silicate, and a mixture thereof, and wherein the particles are modified with a quaternary ammonium salt. Further described is a building panel and building systems comprising a substrate and the coating composition applied thereto as well as methods of making and using the same.