Non-fluorinated Siloxane Cationic Polymer Impregnating Composition
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing impregnating agents face challenges in achieving both water and oil repellency while being environmentally friendly, due to the toxicological and environmental compatibility issues associated with fluorocarbon resins and silicones, and non-fluorinated silicones have limited impregnating effects.
Innovation Solution
Combining non-fluorinated siloxanes with cationic polymers, such as chitosan or amino-functionalized polyurethanes, to enhance the impregnating effect, allowing for reduced usage of problematic active ingredients like fluorocarbon resins and improving the synergistic interaction for better water and oil repellency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fluorocarbon resins and fluorinated silicones are used as impregnating agents, then water and oil repellency requirements are achieved, but toxicological properties and environmental compatibility deteriorate
Solution Approach 1:
The patent changes the chemical composition parameters by replacing fluorocarbon resins and fluorinated silicones with non-fluorinated siloxanes combined with cationic polymers. This parameter change maintains the impregnating effect while eliminating the harmful fluorinated components, thus resolving the contradiction between effectiveness and environmental compatibility
Solution Approach 2:
The patent uses a composite system combining non-fluorinated siloxanes with cationic polymers (such as polydiallyldimethylammonium chloride, polyvinylammonium chloride, or chitosan). This composite approach achieves synergistic effects where the cationic polymer enhances the impregnating capability of the siloxane, allowing fluorocarbon-free formulations to meet the required water and oil repellency standards
2Object-affected harmful factors
If non-fluorinated silicones are used as impregnating agents, then environmental compatibility is improved, but impregnating effect deteriorates
Solution Approach 1:
The patent merges non-fluorinated siloxanes with cationic polymers to create a combined impregnating system. The cationic polymer component (such as polydiallyldimethylammonium chloride or chitosan) works synergistically with the siloxane to enhance surface coverage and impregnating effect, thereby compensating for the lower inherent performance of non-fluorinated silicones alone
Solution Approach 2:
The cationic polymer acts as an intermediary that enhances the interaction between the non-fluorinated siloxane and the substrate surface. The positively charged cationic polymer facilitates better adhesion and distribution of the siloxane on the surface, thereby improving the overall impregnating effect without requiring fluorinated compounds
3Reliability
If fluorocarbon resins are used in impregnation sprays, then water repellency is achieved, but inhalation toxicology restrictions increase formulation complexity
Solution Approach 1:
The patent extracts and removes the harmful fluorocarbon resin component from the impregnation spray formulation. By eliminating fluorocarbon resins and fluorinated silicones, the formulation simplifies the toxicological assessment and removes the associated formulation restrictions, while maintaining water and oil repellency through the alternative non-fluorinated siloxane and cationic polymer system
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 combination of non-fluorinated siloxanes with cationic polymers significantly enhances the impregnating effect, achieving better water and oil repellency with reduced concentrations of environmentally harmful ingredients, thus providing a more eco-friendly solution.
Implementation Method 1
it has been shown that the impregnation effect of such a composition is significantly better than the sum of the impregnation effects of the individual components
Implementation Method 2
non-fluorinated siloxanes usually have a lower impregnating effect than fluorocarbon resins and fluorinated silicones. They often only have a water-repellent effect and only rarely a slight oil-repellent effect
Data Source
Figure 1a~2a
Figure 1b~2b
Figure 3
AI summary
The invention relates to a composition comprising at least one known impregnating agent from the group consisting of fluorocarbon resins and the fluorinated or non-fluorinated silicones and at least one cationic polymer. With the use of a cationic polymer in conjunction with one of the known impregnating agents, an unexpected synergistic effect is achieved.