Fluorinated Silane Surface Treatment for Water and Oil Repellency

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Solution Overview

Problem

Existing silane compounds do not provide sufficient water- and oil-repellency for surface treatment of substrates.

Innovation Solution

A fluorine-containing silane compound represented by the formula Rf α1 -X A< -R Si< β1 , where Rf is an aromatic group substituted with a fluorine atom or fluorine-containing substituent, X A< is a single bond or divalent group, and R Si< contains a Si atom bonded to a hydroxyl or hydrolyzable group, offering enhanced repellency properties.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional silane compounds are used for surface treatment, then the surface treatment can be applied, but water- and oil-repellency is insufficient

Engineering Contradiction:

Improvewater- and oil-repellencyVSAvoidperformance of surface-treating agent

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent introduces fluorine atoms into the silane compound structure, changing the chemical composition parameters. Specifically, the compound contains fluorine-containing organic groups (such as CF3, CHF2, or fluoroalkyl groups) attached to the silane backbone, which fundamentally alters the surface properties and enhances water- and oil-repellency compared to conventional hydrocarbon-based silanes

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention creates a composite molecular structure combining silane inorganic framework with fluorinated organic groups. The general formula Rfα1-XA<β1-SiR11- NRg1 represents this composite structure where the silane portion provides adhesion and the fluorinated portion provides repellency, creating a dual-functional surface treatment agent

Inventive Principle:

Principle #40Composite materials

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 fluorine-containing silane compound provides improved water- and oil-repellency on treated surfaces, enhancing the performance of surface-treating agents.

Implementation Method 1

excellent water- and oil-repellency

Methodology Applied

Scientific EffectHydrophobic effect: Hydrophobe

Implementation Method 2

excellent water- and oil-repellency

Methodology Applied

Scientific EffectOleophobic effect: Hydrophobe

Data Source

PatentEP4644398A1Surface treatment agent

Publication Date: 2025.11.05 DAIKIN INDUSTRIES LTD

AI summary

A fluorine containing silane compound represented by the following formula (1): Rfα1-XA-RSiβ1 (1) wherein Rf is an aromatic group substituted with a fluorine atom or a fluorine containing substituent, XA is a single bond or a di- to decavalent group, RSi is a monovalent group containing a Si atom to which a hydroxyl group or a hydrolyzable group is bonded, α1 is an integer of 1 to 9, and β1 is an integer of 1 to 9.