Fluorine-Based Coating Resolves Crosslinking and Durability Trade-Off
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Solution Overview
Problem
Existing fluorine-based compounds and silicon-based coating agents lack desirable water repellency, oil repellency, and contamination resistance, with poor crosslinking properties and low glass transition temperatures, leading to easy contamination and fingerprint retention.
Innovation Solution
A fluorine-based compound represented by Formula 1, combined with a binder resin and a polymerization initiator, providing excellent water repellency, oil repellency, and weatherability through specific structural groups derived from (meth)acryl or silicon-containing compounds, and a UV or heat-curable binder resin.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a coating agent is formed only using a known silicon compound, then the coating can be applied to surfaces, but the reaction crosslinking property of inorganic oxides is poor and friction durability is poor
Solution Approach 1:
The patent uses a composite coating agent containing both silicon compounds and fluorine-based compounds. The silicon compound provides crosslinking properties and adhesion, while the fluorine-based compound (with formula 1 containing specific functional groups) provides water repellency, oil repellency, and low surface energy. This composite approach resolves the contradiction by combining the strengths of both materials to achieve both crosslinking reliability and friction durability.
2Object-affected harmful factors
If a coating agent is formed only using a fluorine compound, then water repellency and oil repellency are provided, but contaminant removal ability is poor
Solution Approach 1:
The patent combines fluorine-based compounds (providing water and oil repellency through low surface energy) with silicon compounds (providing contaminant removal ability and crosslinking). This composite structure allows the coating to simultaneously achieve water repellency, oil repellency, and contaminant removal capability, resolving the contradiction between repellency and contaminant removal.
3Object-generated harmful factors
If silane compound with perfluorine group is used as surface reforming agent, then contaminant removal ability is improved, but water repellency, oil repellency, and antifouling ability are insufficient
Solution Approach 1:
The patent uses a composite system where the fluorine-based compound (formula 1) provides water and oil repellency through its low surface energy properties, while the silicon compound component provides contaminant removal ability. This balanced composite formulation resolves the contradiction by ensuring both repellency and contaminant removal capabilities are adequately provided.
4Ease of operation
If the glass transition temperature Tg is low, then the coating is more flexible, but contaminants are easily collected and fingerprints remain
Solution Approach 1:
The patent modifies the chemical structure of the fluorine-based compound by introducing specific functional groups (R1, R2, R3 as defined in formula 1) and controlling the glass transition temperature within a specific range ( -50°C to 50°C). This parameter optimization allows the coating to maintain flexibility while achieving sufficient water repellency, oil repellency, and contaminant resistance, resolving the contradiction between flexibility and contamination resistance.
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 fluorine-based compound and coating composition achieve superior water repellency, oil repellency, and antifouling abilities, with improved durability and resistance to contaminants, as evidenced by high contact angles and suitable crosslinking density.
Implementation Method 1
A fluorine-based compound has very low surface energy of about 5 to 6 dyne/cm to provide functionalities of water repellency, oil repellency
Implementation Method 2
a poor reaction crosslinking property of inorganic oxides and, thus, friction durability is poor or desirable crosslinking depending on the number of functional groups forming 3-D structures is not obtained
Data Source
AI summary
The present invention provides a fluorine-based compound and a coating composition and a film including the same. By using the fluorine-based compound according to the present invention, a film having excellent functionalities of water repellency, oil repellency, weatherability and contamination resistance can be provided.