Fluoropolymer Coating Composition for Bubble-Free Hard Coats
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Solution Overview
Problem
Coated articles formed using fluorine-containing polymers in solvents lack sufficient hardness and are prone to air bubble formation during coating and curing processes, affecting their mechanical properties and adhesiveness.
Innovation Solution
A coating material comprising a fluorine-containing polymer with a storage elastic modulus of 200 kPa to 360 kPa and a total light transmittance of 1.0% or more, mixed with a non-fluorine-based solvent, ensures complete dissolution and crosslinking of the polymer, inhibiting air bubble formation and enhancing hardness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If fluorine-containing polymer is dispersed or dissolved in solvent to form coating material, then the coating material can be applied to various substrates, but the coat lacks sufficient hardness
Solution Approach 1:
The patent applies parameter changes by precisely controlling the storage elastic modulus G' of the fluorine-containing polymer within 200-360 kPa and the total light transmittance of the mixed liquid at 1.0% or more. These parameter specifications transform the general problem of insufficient hardness into a controlled solution where specific rheological and optical parameters ensure both coat hardness and substrate adaptability
Solution Approach 2:
The patent uses composite materials by combining the fluorine-containing polymer with specific additives including crosslinking agents (such as organometallic compounds), silane coupling agents, and solvents. This composite formulation creates a coating material that achieves enhanced hardness through crosslinking while maintaining adaptability to various substrates through the synergistic effects of the composite components
2Ease of manufacture
If conventional fluorine-containing polymer coating material is used, then the coating process is simple, but air bubbles form during coating and curing processes
Solution Approach 1:
The patent applies parameter changes by optimizing the storage elastic modulus G' to 200-360 kPa and total light transmittance to 1.0% or more, which fundamentally alters the rheological behavior of the coating material. These parameter changes eliminate air bubble formation during coating and curing while maintaining process simplicity, transforming a reliability problem into a controlled parameter specification
Solution Approach 2:
The patent introduces intermediary substances including crosslinking agents (such as organometallic compounds with formulas (1)-(3)), silane coupling agents, and specific solvents that act as mediators between the fluorine-containing polymer and the coating process. These intermediaries prevent air bubble formation by modifying the coating material's properties without complicating the overall manufacturing process
3Reliability
If fluorine-containing polymer is used for coating, then excellent chemical resistance and weather resistance are achieved, but adhesiveness and impact resistance are insufficient
Solution Approach 1:
The patent applies composite materials by formulating a multi-component system that includes the fluorine-containing polymer, crosslinking agents (such as organometallic compounds), silane coupling agents, and solvents. This composite structure achieves synergistic effects where the fluorine-containing polymer provides chemical and weather resistance, while the crosslinking agents and silane coupling agents enhance adhesiveness and impact resistance
Solution Approach 2:
The patent applies parameter changes by specifying the storage elastic modulus G' of 200-360 kPa and total light transmittance of 1.0% or more for the mixed liquid. These parameter specifications ensure that the coating material achieves both excellent resistance properties and improved mechanical strength, transforming the trade-off between durability and strength into a controlled parameter optimization
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 solution results in a coat with excellent hardness, adhesiveness, and impact resistance, suitable for forming glass fiber products with high volume resistivity and insulability.
Implementation Method 1
a coating material comprising: a fluorine-containing polymer having at least one of an iodine atom and a bromine atom; and a solvent, wherein a storage elastic modulus G' of the fluorine-containing polymer is 200 kPa or more and less than 360 kPa, and a total light transmittance of a mixed liquid obtained by mixing and stirring the fluorine-containing polymer and the solvent is 1.0% or more
Implementation Method 2
ensures complete dissolution and crosslinking of the polymer, inhibiting air bubble formation and enhancing hardness
Data Source
AI summary
A coating material of the present invention is a coating material containing: a fluorine-containing polymer having at least one of an iodine atom and a bromine atom; and a solvent, wherein a storage elastic modulus G' of the fluorine-containing polymer is less than 360 kPa, and a total light transmittance of a mixed liquid obtained by mixing and stirring the fluorine-containing polymer and the solvent contained in the coating material is 1.0% or more, the mixed liquid being left to stand for 3 days, stirred again, and left to stand for 30 minutes to measure the total light transmittance.