Surface Treatment Agent Friction Durability via Molecular Weight Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional perfluoropolyether group containing silane compounds used in surface treatments lack sufficient friction durability for applications requiring long-term functionality, such as optical members and touch panels, which demand enhanced water-repellency, oil-repellency, and antifouling properties.
Innovation Solution
A surface-treating agent comprising perfluoro(poly)ether group containing silane compounds with a molecular weight of 3,000 or less, specifically formulated to achieve a surface-treating layer with improved friction durability by controlling the molecular weight distribution within the agent.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional perfluoropolyether group containing silane compounds are used in surface treatment, then water-repellency and oil-repellency are achieved, but friction durability is insufficient
Solution Approach 1:
The invention changes the molecular weight parameter of the perfluoropolyether group containing silane compound to 3,000 or less, which fundamentally alters the properties of the surface-treating layer. This parameter change enables the formation of a layer with both excellent water-repellency/oil-repellency and significantly improved friction durability, resolving the contradiction between achieving protective functions and maintaining long-term durability.
2Illumination intensity
If a thin film is formed to maintain light permeability, then transparency is preserved, but friction durability decreases
Solution Approach 1:
By changing the molecular weight parameter of the silane compound to 3,000 or less, the invention enables thin film formation that simultaneously achieves both light permeability and high friction durability. The low molecular weight compound forms a sufficiently dense and durable layer even at thin film thickness, resolving the contradiction between maintaining transparency and ensuring 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 solution effectively forms a surface-treating layer with superior water-repellency, oil-repellency, antifouling properties, and high friction durability, suitable for applications like optical members and touch panels, ensuring long-term functionality.
Implementation Method 1
a perfluoropolyether group containing silane compound having a hydrolyzable group bonding to a Si atom in its molecular terminal or terminal portion
Implementation Method 2
The layer formed from the surface-treating agent containing the perfluoropolyether group containing silane compound has been suitably used in an optical member
Implementation Method 3
A certain fluorine-containing silane compound is known to be able to provide excellent water-repellency, oil-repellency, antifouling property
Data Source
AI summary
A surface-treating agent comprising at least one perfluoro(poly)ether group containing silane compound of any of the formulae (Al), (A2), (Bl), (B2), (C1) and (C2): (Rf-PFPE)β'-X5-(SiR1nR23-n)β ··· (B1) (R23-nR1nSi)β-X5-PFPE-X5-(SiR1nR23-n)β ··· (B2) (Rf-PFPE)γ'-X7-(SiRakRblRcm)γ ··· (C1) (RcmRblRakSi)γ-X7-PFPE-X7-(SiRakRblRcm)γ ··· (C2) wherein, each of symbols is as defined in the specification, wherein a proportion of the perfluoro(poly)ether group containing silane compound having a molecular weight of 3,000 or less in the perfluoro(poly)ether group containing silane compounds of any of the above general formulae is 9 mol% or less.