Antimicrobial Polyurethane Coatings via Phenolic Complexes
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Solution Overview
Problem
Existing polyurethane coatings for surfaces like polyvinyl, refrigerators, and greenhouses are prone to mold and fungus growth due to humidity, and current antimicrobial additives often compromise clarity and strength, while traditional solutions fail to provide effective anti-fungal and anti-mold protection without affecting the coating's properties.
Innovation Solution
A two-component polyurethane coating composition incorporating 5-16% phenol compounds, 5-10% amines or diamines, 5-10% dicarboxylic acid, and 20-40% polyester polyol, which forms an antimicrobial phenolic complex that is crosslinked, providing anti-fungal and anti-mold properties without compromising the coating's strength or clarity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If antimicrobial additives are added to polyurethane coatings, then anti-microbial properties are improved, but clarity and strength are compromised
Solution Approach 1:
The patent combines the antimicrobial phenolic complex formation process with the polyurethane coating formulation and curing process. The phenol compound, amine, and dicarboxylic acid are integrated into the coating composition and react to form crosslinked phenolic complexes that are incorporated into the polyurethane matrix, achieving antimicrobial properties without separate additive steps that would compromise clarity or strength.
Solution Approach 2:
The patent creates a composite coating system where phenolic complexes are formed within the polyurethane matrix. The crosslinked phenolic complexes act as integrated antimicrobial agents embedded in the coating, rather than surface-level additives. This composite structure maintains the mechanical properties of polyurethane while providing inherent antimicrobial activity.
2Reliability
If antimicrobial additives are added to polyurethane coatings, then anti-microbial properties are improved, but clarity is compromised
Solution Approach 1:
The patent controls the concentration and reactivity parameters of the phenol compound, amine, and dicarboxylic acid to ensure complete reaction and uniform distribution within the polyurethane matrix. By optimizing these parameters, the phenolic complexes form without aggregation or phase separation that would cause haze, maintaining optical clarity while providing effective antimicrobial protection.
3Reliability
If traditional antimicrobial compositions are used, then anti-microbial properties are improved, but coating strength is reduced
Solution Approach 1:
The patent uses the dicarboxylic acid as an intermediary that facilitates crosslinking between phenolic complexes and the polyurethane matrix. This intermediary reaction mechanism ensures strong integration of antimicrobial agents into the coating structure, preventing the weakness of simple additive approaches while maintaining coating integrity and strength.
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 effectively inhibits mold and fungus growth on various surfaces, including polyvinyl, refrigerators, and greenhouses, while maintaining the strength and clarity of the polyurethane film, offering improved abrasion resistance and breathability.
Implementation Method 1
phenolic complexes which are anti-microbial, anti-fungal, and anti-mold that are crosslinked into the polyurethanes
Data Source
AI summary
There is provided a two component polyurethane coating system which contains anti-microbial complexes consisting of phenol complexes which provide anti-microbial characteristics to the coating system and improved abrasion resistance. There is also provided substrates coated with the antimicrobial coatings.