Fluoropolyether Silane Coating for Adhesion and Water Repellency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing fluoropolyether-containing polymers used in touch panel displays suffer from poor adhesion to substrates, leading to inadequate water/oil repellency and abrasion resistance, despite their inherent properties of low surface free energy and chemical resistance.
Innovation Solution
A fluoropolyether-containing polymer with hydroxy-containing or hydrolyzable silyl groups is used to form a cured coating, enhancing substrate adhesion and improving water/oil repellency and abrasion resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fluoropolyether-containing compounds are used for water/oil repellency, then water/oil repellency and chemical resistance are improved, but adhesion to substrate deteriorates
Solution Approach 1:
The invention uses a composite material consisting of fluoropolyether-containing polymer and silane coupling agent. The fluoropolyether provides water/oil repellency and chemical resistance, while the silane coupling agent provides adhesion to substrate. The combination of these two materials resolves the contradiction by allowing each component to fulfill its strength without interfering with the other's function.
Solution Approach 2:
The silane coupling agent acts as an intermediary between the fluoropolyether-containing polymer and the substrate. It forms a bridge that connects the low-surface-energy fluoropolyether layer to the substrate surface, enabling both good adhesion and maintained water/oil repellency properties.
2Reliability
If fluoropolyether-containing compounds are used for antifouling properties, then antifouling performance is improved, but adhesion to substrate deteriorates
Solution Approach 1:
The composite material system combines fluoropolyether-containing polymer (providing antifouling properties) with silane coupling agent (providing adhesion). This allows the coating to maintain both antifouling performance and strong substrate adhesion simultaneously.
Solution Approach 2:
The silane coupling agent serves as an intermediary layer that ensures strong bonding between the substrate and the fluoropolyether-containing antifouling coating, resolving the adhesion problem while preserving antifouling performance.
3Strength
If silane coupling agent is used to improve adhesion, then adhesion to substrate is improved, but water sliding angle increases (water repellency deteriorates)
Solution Approach 1:
The coating system exhibits local quality differentiation: the silane coupling agent provides adhesion at the substrate interface, while the fluoropolyether-containing polymer provides water repellency at the outer surface. Each component's function is localized to where it is most needed, resolving the contradiction between adhesion and water repellency.
Solution Approach 2:
The composite material system allows the silane coupling agent to fulfill its adhesion function without compromising the water repellency properties of the fluoropolyether-containing polymer. The two materials work together in a synergistic manner.
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 polymer achieves improved substrate adhesion, water/oil repellency, and steel wool abrasion resistance, with a small water sliding angle, resulting in a durable and effective coating.
Implementation Method 1
In the presence of airborne moisture or the like, the hydrolyzable silyl groups undergo self-condensation reaction to form a coating
Implementation Method 2
the hydrolyzable silyl groups undergo self-condensation reaction to form a coating
Implementation Method 3
The hydrolyzable silyl groups form chemical and physical bonds with the surface of glass or metal
Implementation Method 4
fluoropolyether-containing compounds exhibit, by virtue of their extremely low surface free energy, water/oil repellency
Data Source
AI summary
A surface treatment agent that comprises a fluoropolyether-group-containing polymer represented by general formula (1), which has a hydroxylated silyl group or a hydrolyzable silyl group, and/or a product of partial (hydrolytic) condensation of the polymer. The surface treatment agent is capable of forming cured coating films which are excellent in terms of water and oil repellency and resistance to wear by steel wool and have a small water-sliding angle.Rf—[CH(V)2]α Formula (1):(In the formula, Rf is a mono- or divalent residue of a polymer including a fluorooxyalkylene group, the V moieties each independently are a monovalent group having a hydroxylated silyl group or hydrolyzable silyl group at the end and having no polar group besides the hydroxylated silyl group or hydrolyzable silyl group, and α is 1 or 2.).