Perfluoropolyether Silane Compound for Friction-Durable Surface Treatment
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Solution Overview
Problem
Conventional perfluoropolyether group containing silane compounds used for surface treatment lack sufficient friction durability, which is essential for applications requiring long-term functionality, especially in optical members and touch panels that need to maintain light permeability and transparency.
Innovation Solution
A novel perfluoro(poly)ether group containing silane compound with a Si atom at the end of its backbone, connected to another Si atom via a linker and a hydroxyl or hydrolyzable group, forming a surface-treating layer that enhances water-repellency, oil-repellency, antifouling properties, and friction durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional perfluoropolyether group containing silane compounds are used for surface treatment, then water-repellency and oil-repellency are achieved, but friction durability is insufficient
Solution Approach 1:
The patent changes the chemical structure parameters of the silane compound by introducing a specific molecular architecture with Si atoms at both ends of the perfluoropolyether backbone, connected via linker groups. This structural parameter change enables the formation of a crosslinked network that significantly improves friction durability while maintaining water and oil repellency properties.
Solution Approach 2:
The invention creates a composite surface layer by combining perfluoropolyether groups (providing repellency) with silane crosslinked structures (providing durability). The resulting surface-treating layer integrates multiple functional components: the perfluoropolyether chains provide low surface energy for repellency, while the silane crosslinked network provides mechanical strength and friction resistance, achieving both water/oil repellency and high friction durability simultaneously.
2Reliability
If a surface-treating layer is formed to improve friction durability, then water-repellency and oil-repellency are enhanced, but the complexity of the compound structure increases
Solution Approach 1:
The silane compound is segmented into distinct functional modules: perfluoropolyether backbone segments (providing repellency), linker segments (connecting Si atoms), and hydrolyzable group segments (enabling crosslinking). This segmentation allows each part to perform its specific function independently, simplifying the design and synthesis process while achieving the desired composite performance of durability and repellency.
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 novel silane compound forms a surface-treating layer with improved friction durability, water-repellency, and antifouling properties, suitable for applications in optical members and touch panels, ensuring long-term functionality and maintaining light permeability.
Implementation Method 1
a hydroxyl group or a hydrolyzable group is bonded to some of the other Si atom
Implementation Method 2
forming a surface-treating layer that enhances water-repellency, oil-repellency, antifouling properties
Implementation Method 3
provide excellent water-repellency, oil-repellency, antifouling property
Data Source
AI summary
A perfluoro(poly)ether group containing silane compound represented by the formula (1a) or the formula (1b):A-Rf—X—SiQkY3-k (1a)Y3-kQkSi—X—Rf—X—SiQkY3-k (1b)as defined herein. Also disclosed is a process for producing the compound, a surface-treating agent containing the compound, a pellet containing the surface-treating agent and an optical member including a base material and a layer formed on a surface of the base material from the compound.