Fluorinated Surface Coating Composition for Durable Repellency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing surface modifiers using fluorine-containing compounds face issues with durability, abrasion resistance, and environmental concerns, particularly with perfluoroalkyl group-containing silane coupling agents, while perfluoropolyether group-containing agents lack sufficient weather resistance and stability.
Innovation Solution
A surface modifier comprising a condensation reaction product of a perfluoropolyether group-containing silane compound and silicate oligomer at a specific mass ratio, forming a flexible structure with improved adhesion and binder properties, ensuring excellent water- and oil-repellency, stain resistance, and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If perfluoroalkyl group-containing silane coupling agents are used to achieve excellent weather resistance, then coating film durability is improved, but stain resistance and abrasion resistance deteriorate
Solution Approach 1:
The patent uses a composite coating film formed by combining perfluoropolyether group-containing silane coupling agent (providing water- and oil-repellency and stain resistance) with silicate oligomer (providing abrasion resistance and durability). This composite structure resolves the contradiction by integrating the strengths of both material systems rather than relying on a single compound.
Solution Approach 2:
The coating film exhibits different functional zones: the perfluoropolyether chains provide surface-level water- and oil-repellency and stain resistance, while the silicate oligomer forms a durable, abrasion-resistant base layer. Each component performs its specialized function in its optimal location within the coating structure.
2Reliability
If perfluoroalkyl group with 8 or more carbon atoms is used to achieve sufficient performance, then water- and oil-repellency is improved, but environmental safety deteriorates due to biodegradation and bioaccumulation
Solution Approach 1:
The patent changes the chemical structure parameter from perfluoroalkyl group to perfluoropolyether group, specifically using compounds with 6 or less carbon atoms in the perfluoroalkyl portion. This structural modification maintains the desired water- and oil-repellency performance while reducing environmental persistence and bioaccumulation potential.
Solution Approach 2:
The patent converts the previously harmful long perfluoroalkyl chains (8+ carbon atoms) into beneficial short perfluoroalkyl chains (6 or less carbon atoms) combined with ether bonds. This transformation reduces environmental harm while maintaining or improving the functional performance of the coating.
3Object-affected harmful factors
If compounds with perfluoroalkyl group having 6 or less carbon atoms are used to improve environmental safety, then environmental safety is improved, but durability and weather resistance deteriorate
Solution Approach 1:
The patent combines perfluoropolyether group-containing silane coupling agent (environmentally safe with 6 or less carbon atoms) with silicate oligomer (providing durability). The silicate component compensates for the reduced durability of shorter perfluoroalkyl chains, creating a composite system that achieves both environmental safety and long-term durability.
Solution Approach 2:
The patent merges two different chemical systems: the perfluoropolyether silane coupling agent (for environmental safety and surface properties) and the silicate oligomer (for durability and weather resistance). By combining these materials and allowing them to form a integrated coating film, the patent achieves properties that neither component could provide alone.
4Reliability
If perfluoropolyether group-containing silane coupling agents are used to achieve water- and oil-repellency and stain resistance, then initial coating performance is improved, but durability and abrasion resistance deteriorate
Solution Approach 1:
The patent creates a composite coating film where perfluoropolyether group-containing silane coupling agent provides water- and oil-repellency and stain resistance, while silicate oligomer provides durability and abrasion resistance. The synergistic combination resolves the contradiction between initial performance and long-term durability.
Solution Approach 2:
The coating structure is divided into functional zones: the perfluoropolyether chains concentrate at the surface providing water- and oil-repellency and stain resistance, while the silicate oligomer forms a robust underlying layer that provides durability and abrasion resistance. Each component optimizes its performance in its designated functional zone.
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 solution provides coatings with enhanced transparency, storage stability, and improved weather resistance, abrasion resistance, and dynamic repellency, addressing environmental concerns by using a flexible perfluoropolyether chain and dense polysiloxane structure.
Implementation Method 1
a condensation reaction product of a perfluoropolyether group-containing silane compound and silicate oligomer
Data Source
AI summary
A surface modifier comprising, as an active ingredient, a condensation reaction product of a perfluoropolyether group-containing silane compound and silicate oligomer at a mass ratio of 40:60 to 10:90, wherein the perfluoropolyether group-containing silane compound is a compound represented by the general formula: CF3(CF2)mO(C3F6O)n(C2F4O)o(CF2O)p(C2F4)q(CF2)rCONX(CH2)sSi(OR)3 [I] (wherein m is an integer of 0 to 2, preferably 2; n, o, and p are each an integer of 0 to 50, preferably 5 to 20; q and r are each an integer of 0 to 2; s is an integer of 0 to 10, preferably 1 to 3; X is a hydrogen atom or (CH2)sSi(OR)3; and R is an alkyl group having 1 to 3 carbon atoms). The surface modifier has good coating film transparency and liquid storage stability, as well as excellent water- and oil- repellency, stain resistance, weather resistance, and durability (abrasion resistance).