Single-Terminal Silyl Fluorinated Ether Compound for Uniform Coatings
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Solution Overview
Problem
Conventional fluorinated ether compounds with hydrolyzable silyl groups at both terminals exhibit insufficient lubricity, abrasion resistance, and fingerprint stain removal properties due to agglomeration during coating, leading to a non-uniform surface layer with deteriorated appearance.
Innovation Solution
A fluorinated ether compound with a specific structure, represented by formula (1), featuring a perfluoroalkyl group, fluoroalkylene groups without branches, and hydrolyzable silyl groups only at one terminal, forming a surface layer with improved water/oil repellency, abrasion resistance, and fingerprint stain removability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If hydrolyzable silyl groups are introduced at both terminals of the fluorinated ether compound to improve abrasion resistance, then chemical bonding with substrate is enhanced, but lubricity and abrasion resistance become insufficient due to agglomeration and immobilization of both terminals
Solution Approach 1:
The patent extracts the hydrolyzable silyl groups from one terminal of the fluorinated ether compound, leaving only one terminal with this functional group. This prevents both terminals from being immobilized by agglomeration, thereby maintaining lubricity while still achieving sufficient abrasion resistance through chemical bonding with the substrate.
Solution Approach 2:
The patent applies different functional characteristics to different parts of the molecule: one terminal retains the hydrolyzable silyl group for chemical bonding and abrasion resistance, while the other terminal maintains the fluorinated structure for lubricity and water/oil repellency. This local differentiation resolves the contradiction between abrasion resistance and lubricity.
2Strength
If a branched structure by pentaerythritol is introduced to improve abrasion resistance, then chemical bonding is enhanced, but fingerprint stain removal properties and lubricity become insufficient
Solution Approach 1:
The patent removes the branched pentaerythritol structure from the fluorinated ether compound. This elimination of the branched structure prevents the aggregation that would otherwise reduce fingerprint stain removal properties and lubricity, while maintaining adequate abrasion resistance through the single-terminal silyl group configuration.
3Strength
If large content of non-fluorinated portions (branched structure and silyl groups) is present to improve abrasion resistance, then chemical bonding is enhanced, but outer appearance deteriorates due to non-uniform layer formation
Solution Approach 1:
The patent extracts the excessive non-fluorinated portions, specifically the branched pentaerythritol structure, from the molecule. This reduction in non-fluorinated content prevents agglomeration during coating and drying processes, ensuring uniform layer formation and improved outer appearance while maintaining sufficient abrasion resistance through the optimized single-terminal silyl group configuration.
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 compound forms a surface layer with enhanced lubricity, abrasion resistance, and appearance, minimizing agglomeration and ensuring uniformity, thereby improving the overall performance of the treated substrate.
Implementation Method 1
a hydrolyzable silyl group may be introduced at a terminal of the fluorinated ether compound, so that the fluorinated ether compound and the substrate will be chemically bonded
Implementation Method 2
the fluorinated ether compound and the substrate will be chemically bonded
Implementation Method 3
A fluorinated compound exhibits high lubricity
Implementation Method 4
A fluorinated compound exhibits high lubricity, water/oil repellency
Data Source
AI summary
A fluorinated ether compound is represented by formula: [X23-n2R23n2Si—R22—]3C—R21—[N(R2)C(O)]p2—(Rf2O)m2-Q2-[C(O)N(R2)]p2—R21—C[—R22—SiR23n2X23-n2]3. Rf2 is a fluoroalkylene group having no branched structure, Q2 is a fluoroalkylene group having no branched structure, R2 is a hydrogen atom or an alkyl group, R21 is a single bond, an alkylene group, an alkylene group comprising an etheric oxygen atom at its terminal on the side bonded to [X23-n2R23n2Si—R22—]3C, an alkylene group with at least two carbon atoms comprising an etheric oxygen atom between its carbon-carbon atoms, or an alkylene group with at least two carbon atoms comprising an etheric oxygen atom between its carbon-carbon atoms and at its terminal on the side bonded to [X23-n2R23n2Si—R22—]3C, R22 is an alkylene group, or the like, R23 is a hydrogen atom or a monovalent hydrocarbon group, and X2 is a hydrolyzable group.