Fluoropolyether Coating on Metal Substrate for Water Repellency
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Solution Overview
Problem
Metal surfaces are prone to chemical reactions such as oxidation and corrosion, especially when exposed to aqueous liquids, leading to staining and loss of their ornamental appearance, necessitating a protective coating that maintains their appearance while providing water-repellency and oil-repellency.
Innovation Solution
A laminated structure comprising a metal substrate with a phosphate binding layer and a fluoropolyether layer, where the fluoropolyether layer is formed by reacting a triisocyanate with a combination of active hydrogen-containing compounds, including a perfluoropolyether and a monomer with a carbon-carbon double bond, and the phosphate binding layer is formed using a phosphoric acid derivative, followed by ultraviolet light irradiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protective coating is applied to metal surfaces, then water-repellency and corrosion resistance are improved, but the manufacturing process becomes more complex
Solution Approach 1:
The coating is divided into two distinct layers: a phosphate binding layer directly on the metal substrate for corrosion protection, and a fluoropolyether layer on top for water and oil repellency. This segmentation allows each layer to perform its specific function optimally while together providing comprehensive protection.
Solution Approach 2:
The invention uses a composite coating structure combining phosphate-based materials and fluoropolyether compounds. This composite approach integrates the corrosion-resistant properties of phosphate layers with the hydrophobic and oleophobic properties of fluoropolyethers, achieving multiple protective functions simultaneously.
2Stability of the object's composition
If a protective coating is applied to maintain ornamental appearance, then aesthetic appearance is preserved, but the manufacturing process requires additional steps
Solution Approach 1:
The phosphate binding layer is formed first as a preliminary step to ensure corrosion protection and surface preparation before applying the fluoropolyether layer. This preliminary action creates a stable foundation that enhances the overall durability and appearance retention of the coating system.
Solution Approach 2:
The phosphate binding layer acts as an intermediary between the metal substrate and the fluoropolyether layer. It provides chemical bonding to the metal surface while offering a suitable interface for the fluoropolyether coating, ensuring strong adhesion and long-term appearance stability.
3Adaptability or versatility
If metal surfaces are exposed to aqueous liquids, then they provide functional utility, but oxidation and staining occur
Solution Approach 1:
The fluoropolyether layer changes the surface energy parameters of the coating, creating extreme hydrophobicity and oleophobicity. This parameter change allows the surface to repel both water and oil, preventing the harmful effects of aqueous liquid exposure while maintaining functional utility.
Solution Approach 2:
The fluoropolyether layer forms a thin film on the coating surface that provides a physical barrier against water and oil penetration. This flexible protective film maintains the underlying metal's functionality while blocking harmful substances from causing oxidation and staining.
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 solution effectively provides excellent water-repellency, oil-repellency, and antifouling properties to metal surfaces, enhancing their durability and maintaining their aesthetic appearance.
Implementation Method 1
treating a surface of the metal substrate with a phosphoric acid derivative to form the phosphate binding layer on the surface of the metal substrate
Implementation Method 2
treating a surface of the phosphate binding layer with a fluoropolyether compound having a fluoropolyether group and a carbon-carbon double bond to form the fluoropolyether layer on the surface of the phosphate binding layer
Implementation Method 3
irradiating the phosphate binding layer and the fluoropolyether layer with ultraviolet light
Implementation Method 4
provides excellent water-repellency, oil-repellency and antifouling property
Implementation Method 5
provides excellent water-repellency, oil-repellency and antifouling property
Data Source
AI summary
An article including a metal substrate, a phosphate binding layer, and a fluoropolyether layer. Also disclosed is a process for producing the article which includes (i) treating a surface of the metal substrate with a phosphoric acid derivative to form the phosphate binding layer on the surface of the metal substrate, and (ii) treating a surface of the phosphate binding layer with a fluoropolyether compound having a fluoropolyether group and a carbon-carbon double bond to form the fluoropolyether layer on the surface of the phosphate binding layer.