Dual-Silane Fluoropolyether Coating for Friction-Durable Surfaces
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Solution Overview
Problem
Existing surface-treating agents using fluorine-containing silane compounds do not effectively provide a surface-treating layer with good friction durability.
Innovation Solution
A surface-treating agent comprising a combination of fluoropolyether group-containing silane compounds (A) and (B) represented by specific formulas, which form a tight-lattice siloxane three-dimensional crosslink structure, enhancing water-repellency, oil-repellency, and friction durability on various base materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single fluorine-containing silane compound is used as a surface-treating agent, then the surface treatment process is simple, but the friction durability of the formed surface-treating layer is insufficient
Solution Approach 1:
The patent combines two different fluorine-containing silane compounds (compound A with formula (1) and compound B with formula (2)) into a single surface-treating agent composition. This merging of multiple compounds creates a synergistic effect where the combination provides both the water-repellency and oil-repellency properties of individual compounds and, crucially, the friction durability that neither compound achieves alone when used separately.
Solution Approach 2:
The invention creates a composite surface-treating layer by incorporating multiple fluorine-containing silane compounds with different molecular structures and functional groups. The composite nature of this material system allows the different compounds to contribute different properties to the final coating, with the overall composition achieving superior friction durability compared to single-compound systems.
2Object-affected harmful factors
If fluorine-containing silane compounds are used to provide water-repellency and oil-repellency, then the surface has good chemical resistance, but the friction durability is not effectively improved
Solution Approach 1:
The patent employs silane compounds with different functional groups at different positions in the molecular structure. Compound (1) has a specific arrangement of fluorine-containing groups and hydrolyzable groups that provides water-repellency, while compound (2) has a different arrangement that provides oil-repellency. When combined, these local structural variations create different functional zones within the surface-treating layer, each optimized for specific resistance properties while collectively providing friction durability.
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 agent forms a surface-treating layer with improved water-repellency, oil-repellency, antifouling properties, and excellent friction durability, suitable for use as a functional thin film on materials like glass, plastics, and fibers.
Implementation Method 1
a layer formed from a surface-treating agent containing a fluorine-containing silane compound (hereinafter, also referred to as a 'surface-treating layer') is applied as a so-called functional thin film
Implementation Method 2
form a tight-lattice siloxane three-dimensional crosslink structure
Data Source
AI summary
A surface-treating agent containing a fluoropolyether group-containing silane compound (A) and a fluoropolyether group-containing silane compound (B) represented by formula (1) or (2) below:RF1α—XA—RSiβ (1)RSiγ—XA—RF2—XA—RSiγ (2)wherein RF1, XA, RSi, RF2, α, β and γ are as defined herein.