Perfluoropolyether Silicon Coatings for Thin Film Stability
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Solution Overview
Problem
Fluorinated silanes used for oil and water repellent coatings have a short shelf life and require high-shear mixing, often resulting in thick coatings that are not suitable for thin film applications.
Innovation Solution
Perfluoropolyether silicon compounds are synthesized through hydrosilation of hydrocarbylized perfluoroethers with silane compounds, providing a method for forming durable, thin hydrophobic coatings with improved stability and application ease.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fluorinated silanes are applied to substrates for oil and water repellent coatings, then coating durability is improved, but shelf life is reduced
Solution Approach 1:
The patent changes the chemical structure of fluorinated silanes by incorporating perfluoropolyether chains, which fundamentally alters the molecular properties to achieve both long shelf life and durable coatings. This structural parameter change resolves the contradiction between stability during storage and performance during use.
2Reliability
If fluorinated silanes are applied to substrates, then coating durability is improved, but high-shear mixing is required which complicates the application process
Solution Approach 1:
The patent modifies the physical and chemical parameters of fluorinated silanes by introducing perfluoropolyether chains with specific molecular weights and structures. This changes the viscosity, surface tension, and reactivity characteristics, allowing the material to be applied easily without high-shear mixing while maintaining coating durability.
3Quantity of substance
If fluorinated silanes with high solids content are used, then coating concentration is improved, but coating thickness becomes too thick for desired thin film applications
Solution Approach 1:
The patent changes the molecular structure and physical properties of fluorinated silanes by incorporating perfluoropolyether chains, which alters the relationship between concentration and film thickness. This enables achieving thin, uniform coatings even from formulations with appropriate solids content, resolving the contradiction between having sufficient material concentration and forming thin films.
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 method yields high-quality, thin hydrophobic coatings with excellent high-temperature stability and uniform thickness, addressing the issues of shelf life and coating thickness in existing fluorinated silane technologies.
Implementation Method 1
The applied fluorinated silanes are often cured by heating with a catalyst to chemically affix the fluorinated silanes to the substrates
Implementation Method 2
Oil repellent coatings and water repellent coatings may be provided to certain substrates by applying to a substrate fluorinated silanes
Data Source
AI summary
Disclosed are perfluoropolyether silicon compounds, coatings containing the perfluoropolyether silicon compounds, methods of making the perfluoropolyether silicon compounds, and methods of making perfluoropolyether silicon coatings.