Cationic Fluorinated Ether Silane for Aqueous Repellency
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Solution Overview
Problem
There is a challenge in developing compositions comprising fluorinated compounds that can impart water and oil repellency to substrates using aqueous media, as existing fluorinated compounds often require flammable or halogen-containing organic solvents, which are less desirable due to safety concerns.
Innovation Solution
The development of compositions containing cationic compounds with perfluorinated ether groups and reactive silane groups, which can be used in aqueous media to provide water and oil repellency to substrates, either by grafting or blending with nanoparticles, and applying them to various substrates such as textiles and ceramics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fluorinated compounds are applied in compositions comprising substantial amounts of organic solvents to achieve water and oil repellency, then repellency performance is improved, but safety concerns arise due to flammability and halogen content
Solution Approach 1:
The patent changes the chemical composition parameters by using cationic fluorinated compounds with specific structures (Formula I and II) that can be dissolved in aqueous media, replacing flammable organic solvents while maintaining repellency performance through the perfluorinated ether groups and reactive silane groups
Solution Approach 2:
The patent employs readily available cationic fluorinated compounds that can be applied from aqueous solutions, eliminating the need for expensive and hazardous organic solvent systems while achieving the same protective function
2Reliability
If fluorinated compounds are applied in compositions comprising substantial amounts of halogen-containing solvents to achieve water and oil repellency, then repellency performance is improved, but environmental and safety concerns arise
Solution Approach 1:
The patent modifies the solvent composition parameter by using aqueous media instead of halogen-containing organic solvents, and the compound structure parameter by using cationic fluorinated compounds with reactive silane groups that provide the necessary repellency without requiring halogenated solvents
Solution Approach 2:
The patent converts the potential harm of using fluorinated compounds (which often require organic solvents) into a benefit by developing aqueous-based compositions that eliminate halogen-containing emissions while maintaining or improving repellency performance
3Object-affected harmful factors
If fluorinated compounds are used in aqueous media to avoid hazardous solvents, then safety is improved, but solubility and effectiveness are reduced
Solution Approach 1:
The patent creates a composite molecular structure combining cationic fluorinated groups with reactive silane groups and linking groups, where the cationic head provides water solubility and the perfluorinated tail provides oil and water repellency, achieving both safety and effectiveness simultaneously
Solution Approach 2:
The patent changes the molecular structure parameters by incorporating cationic groups that enhance water solubility and reactive silane groups that improve bonding to substrates, allowing effective application from aqueous media while maintaining repellency performance
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
These compositions effectively render substrates water and oil repellent, enhancing their cleanability and durability while avoiding the use of hazardous solvents, as demonstrated by improved repellency ratings and stability in tests.
Implementation Method 1
The silane group reacts with a hydroxyl functional group present on the surface of the nanoparticle
Data Source
AI summary
Compositions comprising cationic compounds having fluorinated ether groups and silane groups are provided, the compounds having the formula (I).