Fluorinated Silane Composition for Water- and Oil-Repellent Surfaces
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Solution Overview
Problem
Existing silane compounds do not provide optimal water- and oil-repellency for substrate surfaces, necessitating the development of a more effective fluorine-containing silane compound.
Innovation Solution
A fluorine-containing silane compound represented by a specific formula with CF3 groups at the end, varying organic groups, and hydroxyl or hydrolyzable groups bonded to a Si atom, offering enhanced water- and oil-repellency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing silane compounds are used for surface treatment, then the substrate surface can be treated, but optimal water- and oil-repellency cannot be achieved
Solution Approach 1:
The patent modifies the molecular structure parameters of silane compounds by introducing specific fluorine-containing groups (CF3 at terminal positions with constraints on vicinal CF2 groups) and varying the organic groups (XA) and silane moieties (RSi). These parameter changes in molecular composition and structure enable superior water- and oil-repellency while maintaining adaptability across different substrate surfaces.
Solution Approach 2:
The invention creates composite molecular structures combining fluorine-containing hydrophobic groups (Rf1 with CF3 terminals), organic linking groups (XA including divalent to decavalent groups), and silane functional groups (RSi with hydroxyl or hydrolyzable groups). This composite structure integrates the benefits of fluorine's water-repellency, organic groups' adaptability, and silane's surface bonding capability, achieving both optimal repellency and substrate versatility.
2Reliability
If fluorine-containing groups are added to enhance water-repellency, then hydrophobicity improves, but molecular complexity increases
Solution Approach 1:
The patent applies local quality by placing fluorine-containing groups (Rf1) specifically at terminal positions of the molecular structure where they provide maximum hydrophobic effect. The CF3 groups are positioned at ends without CF2 at vicinal positions, creating localized hydrophobic zones that maximize water-repellency without requiring fluorine throughout the entire molecule, thus controlling complexity.
Solution Approach 2:
The molecular structure is segmented into distinct functional domains: fluorine-containing hydrophobic groups (Rf1), organic linking groups (XA), and silane functional groups (RSi). This segmentation allows each component to perform its specific function independently - fluorine provides hydrophobicity, organic groups provide structural flexibility and adaptability, and silane groups provide surface bonding - reducing overall molecular complexity through functional modularity.
Data Source
AI summary
A fluorine containing silane compound represented by the following formula (1): (Rf1)α1—XA—(RSi)α2 . . . (1), wherein Rf1 is each independently a group having CF3 at an end, provided that CF3 at the end does not have CF2 at a vicinal position, XA is each independently a single bond, an oxygen atom, or a di- to decavalent organic group, RSi is a monovalent group containing a Si atom to which a hydroxyl group or a hydrolyzable group is bonded, α1 is an integer of 1 to 9, and α2 is an integer of 1 to 9.