Surface Treatment Composition for Resin Slip and Repellency
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Solution Overview
Problem
Conventional surface treatment compositions using fluorine-containing silane compounds are not effective on resin materials, failing to provide long-lasting surface slip properties and are costly due to the need for expensive fluorine solvents, while also being difficult to apply on various base materials.
Innovation Solution
A composition comprising a polyisocyanate trimer reacted with a perfluoropolyether, a silane compound, and a monomer having an active hydrogen and carbon-carbon double bond, with specific molar ratios, to form a layer with excellent surface slip, water-repellency, oil-repellency, and antifouling properties on various materials, including resin-based surfaces, using general-purpose solvents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fluorine-containing silane compound is used for surface treatment, then water-repellency and oil-repellency are improved, but the composition is not conformable to resin materials and cannot be fixed on the surface
Solution Approach 1:
The invention uses a composite composition containing both fluorine-containing silane compound (for water/oil repellency) and carbon-carbon double bond-containing compound (for resin compatibility and bonding). This composite approach allows the composition to simultaneously achieve water-repellency, oil-repellency, and conformability to resin materials including acrylic resin and polycarbonate.
2Ease of operation
If perfluoropolyether is used in the composition, then surface slip property is improved, but solubility in fluorine-free solvent decreases and expensive fluorine solvent is required
Solution Approach 1:
The carbon-carbon double bond-containing compound acts as an intermediary that bridges the fluorine-containing compounds and fluorine-free solvents. This intermediary component enables the perfluoropolyether to be incorporated into the composition while maintaining solubility in cost-effective fluorine-free solvents like ketone solvents and ester solvents, eliminating the need for expensive fluorine solvents.
3Ease of manufacture
If conventional surface treatment composition is used on resin materials, then application is simplified, but the layer is subjected to peeling and surface slip durability is poor
Solution Approach 1:
The composition is applied preliminarily to resin materials before final curing. The carbon-carbon double bond-containing compound enables preliminary bonding to the resin surface, and subsequent curing (via UV irradiation or other methods) strengthens this bonding, preventing peeling and ensuring long-term surface slip durability while maintaining application simplicity.
4Reliability
If fluorine-containing silane compound is used, then antifouling property is improved, but friction durability is insufficient for long-term maintenance
Solution Approach 1:
The invention changes the chemical composition parameters by incorporating carbon-carbon double bond-containing compounds with specific molecular structures that provide both antifouling properties and enhanced friction durability. The specific molar ratios and molecular weights of the components are optimized to maintain antifouling performance while significantly improving friction durability for long-term use in touch panels and other applications.
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 composition achieves durable surface slip and friction properties, improved solubility in fluorine-free solvents, and effective water and oil repellency on resin materials, enhancing the usability of resin-based surfaces in touch panels and other applications.
Implementation Method 1
a composition comprising a compound containing a carbon-carbon double bond obtained by reacting (A) a polyisocyanate which is a trimer of diisocyanate, with (B) a compound having an active hydrogen
Implementation Method 2
the component (B) comprises (B-1) a perfluoropolyether having at least one active hydrogen, and (B-2) a monomer having an active hydrogen and a carbon-carbon double bond
Data Source
AI summary
A composition including a compound containing a carbon-carbon double bond obtained by reacting (A) a polyisocyanate which is a trimer of diisocyanate, with (B) a compound having an active hydrogen, wherein component (B) includes: (B1) a perfluoropolyether having an active hydrogen, (B2) a silane compound having an active hydrogen, and (B3) a monomer having an active hydrogen and a carbon-carbon double bond. Further, a molar amount of an isocyanate group in component (A) is equal to a total molar amount of component (B), and a molar amount of component (B1), component (B2) and component (B3) per 9 moles of the isocyanate group in component (A) are component (B1) 0.1-2 moles, component (B2) 0.05-2 moles, and component (B3) 5-8.85 moles, respectively.