Fluorinated Ether Surface Coatings for Rub-Resistant Water Repellency
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Solution Overview
Problem
Existing surface layers formed with fluorinated ether compounds lack sufficient abrasion resistance, particularly when repeatedly rubbed, necessitating an improvement in durability.
Innovation Solution
A composition comprising specific fluorinated ether compounds represented by formulas (A1), (A2), and (A3) as a first component, and compounds represented by formulas (B1) and (B2) as a second component, which form a surface layer on a substrate through dry or wet coating methods, enhancing abrasion resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a surface layer is formed using a fluorinated ether compound, then water repellency and lubricity are improved, but abrasion resistance deteriorates
Solution Approach 1:
The patent uses a composite fluorinated ether compound comprising both a first component (formulae A1-A3) and a second component (formulae B1-B2). This composite structure combines the water repellency and lubricity benefits of fluorinated ether compounds while improving abrasion resistance through the specific combination of molecular structures, particularly those containing poly(oxyperfluoroalkylene) chains with hydrolysable silyl groups.
Solution Approach 2:
The patent modifies the molecular structure parameters of the fluorinated ether compound by specifying precise formulae (A1-A3 and B1-B2) with defined molecular weights and structural characteristics. The first component has a molecular weight of 100-1000 and contains specific fluoroalkyl groups, while the second component has a molecular weight of 50-500 and contains specific fluoroalkylene groups, optimizing both water repellency and abrasion resistance.
2Reliability
If a surface layer is formed using a fluorinated ether compound, then water repellency is improved, but durability under repeated rubbing deteriorates
Solution Approach 1:
The composite fluorinated ether compound combines specific first components (formulae A1-A3) with second components (formulae B1-B2) to create a surface layer that maintains water repellency while improving durability under repeated rubbing. The specific molecular structures provide both immediate performance and long-term durability.
Solution Approach 2:
The fluorinated ether compound is applied to the substrate in advance to form a surface layer that prevents water and oil staining. The compound contains hydrolysable silyl groups that undergo preliminary chemical bonding to the substrate, creating a durable protective layer that resists degradation under repeated rubbing.
3Ease of operation
If a surface layer is formed using a fluorinated ether compound, then lubricity is improved, but abrasion resistance deteriorates
Solution Approach 1:
The patent employs a composite fluorinated ether compound where the first component (formulae A1-A3) provides lubricity through its molecular structure, while the second component (formulae B1-B2) enhances abrasion resistance. The combination achieves both smoothness and durability.
Solution Approach 2:
Different parts of the fluorinated ether compound molecule serve different functions: the fluoroalkyl groups and poly(oxyperfluoroalkylene) chains provide lubricity and water repellency, while the hydrolysable silyl groups provide abrasion resistance through strong chemical bonding to the substrate. This local functional differentiation resolves the contradiction between lubricity and abrasion resistance.
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 composition results in a surface layer with improved water repellency and abrasion resistance, maintaining performance even with repeated rubbing.
Implementation Method 1
a surface layer formed of a condensate of a fluorinated ether compound
Implementation Method 2
having a poly(oxyperfluoroalkylene) chain and a hydrolysable silyl group
Data Source
AI summary
To provide a composition from which a surface layer excellent in abrasion resistance can be formed, a substrate with a surface layer, and a method for producing a substrate with a surface layer. A composition containing a first component composed of at least one fluorinated ether compound selected from the group consisting of a compound represented by the formula (A1), a compound represented by the formula (A2) and a compound represented by the formula (A3), and a second component composed of at least one fluorinated ether compound selected from the group consisting of a compound represented by the formula (B1) and a compound represented by the formula (B2).