Fluorinated Ether Coating Composition for Durable Surface Layers

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Solution Overview

Problem

Existing fluorine-containing ether compounds used for surface treatment agents lack sufficient durability, particularly in terms of rub resistance and fingerprint stain removability, limiting their application to various materials beyond smartphones and tablet devices.

Innovation Solution

Development of fluorine-containing ether compounds with specific structures, including fluoroalkyl groups, polyfluoropolyether chains, and adhesion groups, which form a surface layer with enhanced durability through improved chemical bonding and molecular alignment, using reactive silyl groups for adhesion.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If existing fluorine-containing ether compounds are used for surface treatment, then water and oil repellency and lubricity are achieved, but durability (rub resistance and fingerprint stain removability) is insufficient

Engineering Contradiction:

ImprovedurabilityVSAvoidapplication scope

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent modifies the molecular structure parameters of fluorine-containing ether compounds by introducing specific adhesion groups (hydrolyzable silyl groups, epoxy groups, carboxyl groups, hydroxyl groups, isocyanate groups, or thiocyanate groups) at the terminal positions of the ether chains. This structural parameter change enables the compounds to form durable surface layers with enhanced rub resistance and fingerprint stain removability while maintaining water and oil repellency and lubricity properties.

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If surface treatment agents are applied to various materials beyond smartphones and tablets, then adaptability is improved, but durability requirements become more stringent

Engineering Contradiction:

Improveapplication scopeVSAvoiddurability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent develops fluorine-containing ether compounds with multi-functional terminal groups that can adhere to diverse substrate materials including glass, metals, and resins. The adhesion groups (hydrolyzable silyl groups, epoxy groups, carboxyl groups, hydroxyl groups, isocyanate groups, or thiocyanate groups) provide universal bonding capability across different material types, enabling the surface treatment agent to maintain excellent durability (rub resistance and fingerprint stain removability) across various applications beyond smartphones and tablets.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Duration of action of stationary object

If conventional fluorine-containing ether compounds are used, then initial surface properties are achieved, but performance degrades over time

Engineering Contradiction:

Improveperformance maintenance periodVSAvoidrub resistance

Core Design Contradiction:

Duration of action of stationary objectVSReliability

Solution Approach 1:

The patent incorporates adhesion groups (hydrolyzable silyl groups, epoxy groups, carboxyl groups, hydroxyl groups, isocyanate groups, or thiocyanate groups) at the terminal positions of the fluorine-containing ether compounds before application. These groups preliminarily prepare for strong bonding with the substrate surface, forming a durable surface layer that maintains excellent rub resistance and fingerprint stain removability over extended periods, preventing performance degradation over time.

Inventive Principle:

Principle #10Preliminary action

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 new compounds provide a surface layer with excellent durability, including superior rub resistance, chemical resistance, and light resistance, maintaining performance over time.

Implementation Method 1

T is an adhesion group

Methodology Applied

Scientific EffectAdhesion: Adhesive

Implementation Method 2

hydrolyzable silyl groups

Methodology Applied

Scientific EffectChemical bonding: Chemical Bonding

Data Source

PatentUS12583968B2Fluorine-containing ether compound and production method therefor, compound and production method therefor, fluorine-containing ether composition, coating liquid, and article and production method therefor

Publication Date: 2026.03.24 AGC INC

AI summary

Provided are: a fluorine-containing ether compound, a fluorine-containing ether composition, and a coating liquid that are capable of forming a surface layer having excellent durability; and an article that has a surface layer having excellent durability. The present invention provides a fluorine-containing ether compound represented by formula (A1) or formula (A2) below.RfO—(Rf1O)m—R1-L1-R2-Q1(-T)n formula (A1)(T-)nQ1-R2-L1-R1—O—(Rf1O)m—R1-L1-R2-Q1(-T)n formula (A2)In the formulae, symbols are as defined in the description.