Fluoropolyether Silane Compounds for Abrasion-Resistant Surface Treatment
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Solution Overview
Problem
Existing fluoropolyether group-containing silane compounds provide excellent surface-treating layers but lack sufficient durability, particularly in terms of abrasion resistance.
Innovation Solution
A fluoropolyether group-containing silane compound with specific molecular structures (Rf 1< -R F< -O q -X A< -C(=O)-N(R 1< )-X B< -R Si< and R Si< -X B< -N(R 1< )-C(=O)-X A< -Rf 2< p -R F< -O q -X A< -C(=O)-N(R 1< )-X B< -R Si< ) that enhance abrasion durability, forming a surface-treating layer with improved lubricity and chemical resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional fluoropolyether group-containing silane compounds are used for surface treatment, then excellent water-repellency and oil-repellency are achieved, but the abrasion durability of the surface layer is insufficient
Solution Approach 1:
The patent uses composite silane compounds containing both fluoropolyether groups (for water/oil repellency) and specific organic groups (for durability). The compound structure combines Rf1-RF-Oq-XA-C(=O)-N(R1)-XB-RSi< and RSi<-XB-N(R1)-C(=O)-XA-Rf2-p-RF-Oq-XA units, creating a composite material that achieves both repellency and abrasion resistance simultaneously.
Solution Approach 2:
The patent optimizes specific molecular parameters including the fluoropolyether chain length (q), the organic group structure (R1), and the silane crosslinking structure (XA, XB). By carefully controlling these parameters within specified ranges, the compound achieves enhanced abrasion durability while maintaining water and oil repellency properties.
2Productivity
If the chain length of fluorine-containing organic group is shortened to improve reactivity, then coating performance is enhanced, but abrasion resistance deteriorates
Solution Approach 1:
The patent precisely controls the chain length parameter (q) of the fluoropolyether group within specific ranges (q=1-10 preferably). This parameter optimization balances the reactivity needed for good coating performance with the chain length required to maintain abrasion resistance, resolving the contradiction between short-chain reactivity and long-chain durability.
Solution Approach 2:
The patent combines fluoropolyether groups with specific organic groups (amino, carboxyl, or hydroxyl groups) to create a composite structure. This composite approach allows the fluoropolyether portion to provide water/oil repellency while the organic group portion contributes to crosslinking density and abrasion resistance, even with optimized chain lengths.
Data Source
AI summary
The present invention provides a fluoropolyether group-containing silane compound represented by the following formula (1) or (2).