Fluoropolyether Coating Composition for Cleanable Abrasion Resistance
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Solution Overview
Problem
Existing fluoropolyether group-containing polymer compositions do not maintain high abrasion resistance after surface cleaning, which is crucial for touch panel displays and other surfaces that require frequent cleaning to maintain appearance and functionality.
Innovation Solution
A specific combination of fluoropolyether group-containing polymers and/or partial (hydrolyzed) condensates thereof, with a specific ratio of components (I) and (II), forming a cured film that retains excellent water/oil repellency and abrasion resistance even after surface cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fluoropolyether group-containing compounds are applied to substrate surface, then water/oil repellency and antifouling properties are improved, but adhesion to substrate deteriorates
Solution Approach 1:
The patent combines fluoropolyether group-containing compound (providing water/oil repellency and antifouling properties) with silane coupling agent (providing adhesion to substrate) into a single coating composition. This merging allows the coating to simultaneously achieve low surface free energy for repellency and strong chemical bonding to the substrate through hydrolyzable silyl groups, resolving the contradiction between repellency and adhesion.
Solution Approach 2:
The invention creates a composite coating material that integrates the functional properties of fluoropolyether compounds (water/oil repellency, chemical resistance, lubricating properties) with the bonding capabilities of silane coupling agents. The composite structure allows both properties to coexist and function simultaneously in the cured film.
2Reliability
If existing fluoropolyether group-containing polymer composition is used, then water/oil repellency is improved, but abrasion resistance after surface cleaning deteriorates
Solution Approach 1:
The patent optimizes the molecular structure parameters of the fluoropolyether group-containing polymer, specifically controlling the fluoropolyether group content (0.1-10 mmol/g) and introducing hydrolyzable silyl groups with specific structures. These parameter changes enable the coating to maintain both water/oil repellency and high abrasion resistance after cleaning by achieving proper balance between surface energy and film durability.
Solution Approach 2:
The invention introduces local quality differentiation within the polymer molecule by incorporating hydrolyzable silyl groups at specific positions while maintaining the fluoropolyether backbone. The silane groups provide localized adhesion and film-forming capability for abrasion resistance, while the fluoropolyether segments maintain low surface free energy for water/oil repellency, allowing both properties to coexist.
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 provides a cured film with superior water/oil repellency and high abrasion resistance, ensuring durability and performance even after repeated cleaning cycles.
Implementation Method 1
In the presence of water, such as airborne moisture, the hydrolyzable silyl groups undergo self-condensation reaction to form a film
Implementation Method 2
the hydrolyzable silyl groups undergo self-condensation reaction
Implementation Method 3
Fluoropolyether group-containing compounds have a very low surface free energy and thus generally exhibit such properties as water/oil repellency
Data Source
AI summary
Provided is a coating agent comprising a fluoropolyether group-containing polymer composition that contains, at a specific ratio: a polymer and/or a partial (hydrolyzed) condensate (I) thereof, the polymer having a fluorooxyalkyl group at one end thereof, and at least two reactive functional groups at the other end thereof; and a polymer and/or a partial (hydrolyzed) condensate (II) thereof, the polymer having a fluorooxyalkylene group in a molecule, and a reactive functional group bonded to both ends of the fluorooxyalkylene group via a linking group that does not have a polar group. By using the coating agent, a cured film can be formed that has excellent water and oil repellency, and abrasion durability, and that maintains high abrasion durability even after surface cleaning.