Textile Repellent Composition Using C6 Fluoropolymers
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Solution Overview
Problem
Existing compositions with shorter perfluoroalkyl chain lengths in polymers for textile treatment offer ecological advantages but result in poorer oil- and water-repellent properties, while longer chain lengths provide better performance but at a higher environmental cost.
Innovation Solution
An aqueous composition comprising specific components, including a polysiloxane, blocked polyurethane, and a polymer with a high percentage of perfluoroalkyl groups having 6 carbon atoms, which enhances oil- and water-repellent properties on textiles, achieving performance comparable to longer chain lengths with lower additive amounts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If shorter perfluoroalkyl chain lengths (fewer than 8 carbon atoms) are used in polymers for textile treatment, then ecological advantages are achieved, but oil- and water-repellent properties deteriorate
Solution Approach 1:
The patent optimizes the perfluoroalkyl chain length parameter to exactly 6 carbon atoms, which is the critical value that provides sufficient oil- and water-repellent properties while maintaining ecological advantages. This specific parameter setting resolves the contradiction by finding the optimal balance point between performance and environmental impact.
Solution Approach 2:
The patent uses composite polymer systems containing multiple components including perfluoroalkyl-containing polymers, polyurethanes, and other functional polymers. This composite approach allows the 6-carbon perfluoroalkyl groups to work synergistically with other components to achieve adequate repellent properties while maintaining shorter, more ecologically friendly chain lengths.
2Reliability
If longer perfluoroalkyl chain lengths (8 or more carbon atoms) are used in polymers for textile treatment, then oil- and water-repellent properties are improved, but ecological disadvantages increase
Solution Approach 1:
The patent deliberately reduces the perfluoroalkyl chain length parameter from the conventional 8+ carbon atoms to exactly 6 carbon atoms. This parameter reduction maintains adequate oil- and water-repellent properties through optimized polymer composition and formulation, while significantly improving ecological performance by reducing persistence and bioaccumulation potential.
3Quantity of substance
If shorter perfluoroalkyl chain lengths are used, then cost advantages are achieved, but oil- and water-repellent effect is insufficient
Solution Approach 1:
The patent employs composite polymer formulations that combine perfluoroalkyl-containing polymers with polyurethanes, acrylic polymers, and other functional components. This composite system allows the 6-carbon perfluoroalkyl groups to achieve adequate repellent effects through synergistic interactions, reducing the need for excessive additive amounts while maintaining performance.
Solution Approach 2:
The patent optimizes the concentration and distribution of 6-carbon perfluoroalkyl groups within the polymer structure, achieving maximum efficiency at this specific chain length. This parameter optimization ensures adequate repellent properties are obtained with reasonable additive amounts, balancing cost and 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
The composition provides significantly improved oil- and water-repellent effects on textiles, matching the performance of longer chain lengths while using fewer additives, thus offering both ecological and cost advantages.
Implementation Method 1
confer oil- and/or water-repellent properties on fiber materials
Implementation Method 2
oil- and water-repellent properties
Implementation Method 3
polymers containing perfluoroalkyl groups (RF groups) of the structure CF3-(CF2)x-CF2-
Data Source
AI summary
Described are 8 aqueous compositions useful for treating textile materials to impart oil- and/or water-repellent properties thereto. The compositions contain inter alia polymers containing perfluoroalkyl groups (RF groups), wherein 55 to 100% of the RF groups contain 6 carbon atoms.