Fluorinated Ether Silane Coatings for Aqueous Repellency
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Solution Overview
Problem
There is a need for compositions comprising fluorinated compounds that can impart water and oil repellency to substrates using aqueous or substantially 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, including textiles and paper, by grafting or blending them with nanoparticles such as silica, titanium, or zirconium particles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fluorinated compounds are applied in compositions comprising substantial amounts of organic solvents to impart water and oil repellency, then repellency performance is improved, but safety and environmental hazards increase due to flammability and halogen content
Solution Approach 1:
The patent changes the solvent parameter from organic to aqueous media, and modifies the fluorinated compound structure to include cationic groups and reactive silane groups. This allows the composition to be applied in water-based formulations while maintaining repellency performance through the fluorinated ether groups and enabling covalent bonding to substrates via silane groups.
Solution Approach 2:
The patent creates a composite structure where cationic fluorinated compounds with silane groups are combined with aqueous media. The resulting composition integrates the water-repellent fluorinated ether groups with substrate-bonding silane groups and cationic groups for enhanced adhesion, forming a multi-functional coating system that eliminates organic solvents.
2Productivity
If fluorinated compounds are applied in compositions comprising halogen-containing solvents such as tetrachloroethylene or trichlorotrifluoroethane, then application effectiveness is improved, but environmental and safety concerns increase
Solution Approach 1:
The patent fundamentally changes the solvent parameter from halogen-containing organic solvents to aqueous media. The fluorinated compounds are reformulated with cationic and silane groups to ensure effective application and bonding in water-based systems, eliminating the need for hazardous halogenated solvents while maintaining application performance.
Solution Approach 2:
The patent introduces reactive silane groups as intermediaries that enable covalent bonding between the fluorinated compound and substrate. This mediator mechanism ensures effective application and durable attachment without requiring halogen-containing solvents, as the silane groups facilitate chemical bonding in aqueous environments.
3Stability of the object's composition
If conventional fluorinated compounds are used in organic solvent compositions, then solubility is improved, but the compositions become less desirable due to flammability and environmental concerns
Solution Approach 1:
The patent changes the chemical structure parameters of the fluorinated compound by incorporating cationic groups and reactive silane groups. These structural modifications enable the compound to be soluble in aqueous media rather than requiring organic solvents, thereby eliminating flammability while maintaining composition stability and solubility.
Solution Approach 2:
The patent changes the solvent parameter from organic to aqueous media, and modifies the fluorinated compound structure to include cationic groups and reactive silane groups. This allows the composition to be applied in water-based formulations while maintaining repellency performance through the fluorinated ether groups and enabling covalent bonding to substrates via silane groups.
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 various tests.
Implementation Method 1
reactive silane groups
Implementation Method 2
reactive silane groups
Implementation Method 3
perfluorinated ether groups
Implementation Method 4
impart water repellency, oil repellency
Data Source
AI summary
Compositions comprising cationic compounds having fluorinated ether groups and silane groups are provided, the compounds having the formula (I).