Fluoropolyether group-containing compound

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Solution Overview

Problem

Cured layers formed using fluorine-containing silane compounds with fluoroether groups do not provide good friction durability.

Innovation Solution

A surface-treating agent comprising a fluoropolyether group-containing compound with specific molecular structures and ratios, along with a fluorine-containing oil, is used to form a cured layer with improved friction durability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If fluoropolyether group-containing silane compounds with repeating unit (CF(CF3)CF2O) are used, then water-repellency and oil-repellency are improved, but friction durability deteriorates

Engineering Contradiction:

Improvewater-repellency and oil-repellencyVSAvoidfriction durability

Core Design Contradiction:

ReliabilityVSDuration of action of stationary object

Solution Approach 1:

The patent changes the chemical structure parameter of the fluoropolyether group by selecting specific repeating units from a defined group: - (CF2CF2O)-, - (CF2CF(CF3)O)-, - (CF(CF3)CF2O)-, or - (C(CF3)2O)-. By controlling which repeating units are present and their proportions, the patent achieves both good friction durability and repellency properties, resolving the contradiction between water/oil repellency and friction durability.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If fluorine-containing silane compounds are used for surface treatment, then antifouling property is improved, but friction durability deteriorates

Engineering Contradiction:

Improveantifouling propertyVSAvoidfriction durability

Core Design Contradiction:

ReliabilityVSDuration of action of stationary object

Solution Approach 1:

The patent modifies the molecular structure parameters of the fluorine-containing silane compound by specifying particular fluoropolyether repeating units and their combinations. This structural parameter change enables the cured layer to simultaneously achieve antifouling properties and friction durability, resolving the contradiction between these two performance aspects.

Inventive Principle:

Principle #35Parameter changes

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 cured layer exhibits good friction durability, chemical resistance, water-repellency, oil-repellency, antifouling properties, and surface lubricity, with enhanced durability against high temperatures and UV exposure.

Implementation Method 1

a hydrolyzable group bonding to a Si atom at the molecular terminal or in the terminal part

Methodology Applied

Scientific EffectHydrolysis: Hydrolysis

Implementation Method 2

cured layers obtained by using such compounds

Methodology Applied

Scientific EffectCondensation:

Implementation Method 3

excellent water-repellency, oil-repellency

Methodology Applied

Scientific EffectHydrophobe: Hydrophobe

Implementation Method 4

surface lubricity, with enhanced durability against high temperatures and UV exposure

Methodology Applied

Scientific EffectLubrication: Lubrication

Data Source

PatentEP3950779B1Fluoropolyether group-containing compound

Publication Date: 2025.12.03 DAIKIN INDUSTRIES LTD

AI summary

The present invention provides a fluoropolyether group-containing compound of the following formula (1) or (2).