Fluorine-Containing Copolymer for Solvent-Soluble Surface Treatment
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Solution Overview
Problem
Existing fluorine-containing polymers used for surface treatment lack high solubility in solvents, limiting their effectiveness as surface-treating agents.
Innovation Solution
A fluorine-containing copolymer with specific divalent fluoropolyether groups and functional organic groups, represented by formulas (1) and (2), which enhances solubility and provides improved surface properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional fluorine-containing polymers are used for surface treatment, then water-repellency and oil-repellency are provided, but solubility in solvents is insufficient
Solution Approach 1:
The patent uses a composite structure combining fluoropolyether groups (providing fluorine-containing properties) with polyol groups (providing solubility). This composite approach allows the polymer to simultaneously achieve water-repellency, oil-repellency, and high solubility in conventional solvents, resolving the contradiction between reliability and ease of manufacture.
Solution Approach 2:
The patent modifies the chemical structure parameters of fluorine-containing polymers by introducing specific polyol groups at defined positions in the molecule. This structural parameter change enhances solubility while maintaining the fluorine-containing properties necessary for surface treatment effectiveness.
2Ease of manufacture
If fluorine-containing polymers with high solubility are developed, then surface treatment effectiveness is improved, but polymer structure complexity increases
Solution Approach 1:
The patent divides the polymer structure into distinct functional segments: fluoropolyether groups responsible for fluorine-containing properties and polyol groups responsible for solubility. This segmentation allows each component to perform its specific function independently, achieving surface treatment effectiveness without excessive overall complexity.
Solution Approach 2:
The fluoropolyether-polyol polymer structure serves multiple functions simultaneously: it provides water-repellency, oil-repellency, high solubility, and friction durability. This multi-functionality reduces the need for multiple separate additives or treatments, effectively managing complexity while improving ease of manufacture.
3Reliability
If existing fluorine-containing polymers are used, then water-repellency and oil-repellency are achieved, but friction durability is insufficient
Solution Approach 1:
The composite fluoropolyether-polyol structure combines the low-friction properties of fluorine-containing groups with the durability-enhancing effects of polyol groups. This combination provides both initial surface lubricity and long-term friction durability, preventing lubricity degradation over time.
Solution Approach 2:
The polymer structure is designed to maintain continuous protective action on the substrate surface. The combination of fluoropolyether and polyol groups ensures sustained friction durability and prevents degradation of surface lubricity, providing continuous useful action rather than temporary effect.
Data Source
AI summary
A fluorine-containing copolymer represented by formula (1) or (2):where RF1, Xa, Xb, R4, n, Ra and RF2 are as defined herein. Also disclosed is a surface-treating agent containing the fluorine-containing copolymer, a curable composition containing the fluorine-containing copolymer or surface-treating agent and a matrix forming composition, a film formed from the surface-treating agent or curable composition, and an article including a substrate and a layer formed on a surface of the substrate from the surface-treating agent or curable composition.