Durable Antifungal Coating With Low-Leaching Biocide Film
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing anti-fungal and algae resistant coatings rely on heavy metals and fluorinated resins, which pose environmental toxicity concerns and leaching issues, leading to short-lived efficacy.
Innovation Solution
A water-based coating composition using a stable binder system with encapsulated and non-encapsulated biocides, an organic-inorganic hybrid resin, and a siloxane component to form a durable, weather-resistant film that minimizes leaching and maintains efficacy for extended periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If heavy metal complexes are used in anti-fungal and algae resistant coatings, then long term protection and water insolubility are achieved, but environmental toxicity and leaching into water systems occur
Solution Approach 1:
The patent extracts and removes heavy metal complexes from the coating formulation, replacing them with organic biocidal agents. This extraction eliminates the harmful heavy metal components while maintaining the protective function through alternative chemical mechanisms that do not involve metal leaching into water systems.
Solution Approach 2:
The patent changes the chemical parameters of the biocidal agents from heavy metal-based to organic compounds with specific molecular structures. This parameter change maintains water insolubility and durability while eliminating environmental toxicity, achieving long-term protection without harmful leaching.
2Duration of action of stationary object
If fluorinated resins are used as carriers and film forming compositions, then durability and gloss retention are improved, but toxicity concerns in plants and animals occur
Solution Approach 1:
The patent extracts fluorinated resins from the formulation and replaces them with alternative film-forming compositions. This removal eliminates the toxic fluorinated components while preserving the durability and gloss retention properties through non-fluorinated polymer systems that do not harm plants and animals.
Solution Approach 2:
The patent changes the chemical composition parameters from fluorinated to non-fluorinated resins, maintaining the film-forming capability and durability characteristics while eliminating environmental toxicity to flora and fauna.
3Loss of substance
If water-soluble biocides are used, then environmental leaching occurs quickly, but herbicidal efficacy is lost rapidly
Solution Approach 1:
The patent changes the solubility parameter of biocidal agents from water-soluble to water-insoluble. This parameter change prevents rapid leaching into the environment while maintaining sustained release and prolonged efficacy, achieving both reduced environmental loss and extended protective action.
4Ease of manufacture
If conventional acrylic and polyurethane systems are used, then coating performance is achieved, but durability and gloss retention are inferior to fluorinated resins
Solution Approach 1:
The patent employs composite material formulations that integrate multiple polymer components and biocidal agents in specific ratios. This composite approach achieves superior durability and gloss retention by combining the advantages of different material systems while eliminating their individual disadvantages, outperforming both conventional acrylic/polyurethane and fluorinated resin systems.
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 provides long-lasting anti-fungal and algae resistance with minimal environmental impact, exceeding the durability and gloss retention of conventional systems, and maintains effectiveness for up to five years.
Implementation Method 1
a film forming composition dispersed within the water present in an effective amount to form a clear film on the substrate post-application
Implementation Method 2
a biocide dispersed within the water present in an effective amount to prevent and/or reduce fungal and/or algal growth on the substrate post-application
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A liquid anti-fungal and/or algae resistant composition that forms a coating on a substrate post-application in which the composition includes less than 0.01 wt% heavy metal containing components and less than 0.01 wt% fluoro containing components. An anti-fungal and/or algae resistant coating applied to/on a substrate that further exhibits durability. The coating including less than 0.01 wt% heavy metal containing components and less than 0.01 wt% fluoro containing components.