Matte Silicone Coating for EMAS Weather Resistance
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Solution Overview
Problem
The existing polyester cover plates for Engineered Material Arresting Systems (EMAS) suffer from poor weather resistance and reflection issues, which can lead to short service life and flight accidents due to interference with pilots' sight.
Innovation Solution
A matte weather-resistant silicone coating is developed, comprising α,ω-dihydroxypolydimethylsiloxane, linear polydimethylsiloxane, fumed silica, precipitated silica, crosslinking agents, and a delustering agent, providing excellent adhesion, mattness, and environmental friendliness, while ensuring fast curing and moderate strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a polyester cover plate is used for EMAS, then the basic structural requirements are met, but the weather resistance is poor and service life is short
Solution Approach 1:
The patent applies a silicone coating layer on top of the polyester cover plate to create a composite structure. The coating comprises silane-modified polyurethane resin, silicone oil, and various additives that provide superior weather resistance, UV protection, and durability compared to the polyester substrate alone, thereby extending the service life of the EMAS cover plate.
Solution Approach 2:
The patent modifies the surface properties of the cover plate by applying a coating with different chemical and physical parameters. The silicone-based coating has enhanced resistance to environmental factors such as UV radiation, moisture, and temperature variations, changing the protective parameters of the overall structure to improve reliability and service life.
2Object-affected harmful factors
If a polyester cover plate is used for EMAS, then the basic structural requirements are met, but reflection interferes with pilot sight causing flight accidents
Solution Approach 1:
The patent incorporates pigments and dyes into the silicone coating formulation to control the optical properties of the cover plate surface. By adjusting the color characteristics and light absorption properties of the coating, excessive reflection is reduced while maintaining adequate visibility, thereby eliminating the harmful reflection effect that interferes with pilot sight and improves aviation safety.
3Illumination intensity
If a matte coating is applied to improve mattness, then reflection is reduced, but the coating must maintain good adhesion and weather resistance
Solution Approach 1:
The patent uses a composite coating formulation combining silane-modified polyurethane resin with silicone oil and various functional additives. This composite structure provides both matte finish properties to reduce reflection and maintains excellent adhesion to the polyester substrate along with superior weather resistance, achieving multiple performance requirements simultaneously.
Solution Approach 2:
The silane-modified polyurethane resin acts as an intermediary material that bonds well to both the polyester cover plate and the silicone oil additives. This intermediary resin system ensures proper adhesion while allowing the incorporation of matte-effect components, bridging the requirements for mattness and structural integrity.
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 coating enhances the weather resistance and mattness of EMAS cover plates, extending service life, reducing maintenance costs, and ensuring pilot safety by minimizing glare, thus improving aviation safety and reducing accident risks.
Implementation Method 1
under the catalysis of the organotin chelate catalyst, there is condensation reaction between the silane crosslinking agent and water, so as to form a crosslinked structure of the silicone polymer
Implementation Method 2
under the catalysis of the organotin chelate catalyst, there is condensation reaction between the silane crosslinking agent and water
Data Source
AI summary
A weather resistant matte silicone coating special for EMAS, comprising: 80˜130 parts by weight of α,ω-dihydroxypolydimethylsiloxane; 0.5˜10 parts by weight of a linear polydimethylsiloxane with terminal hydroxyl group; 1˜10 parts by weight of fumed silica; 10˜50 parts by weight of precipitated silica; 1˜5 parts by weight of color masterbatch; 0.9˜5 parts by weight of organotin chelate catalyst; crosslinking agent, comprising 1.5˜7 parts by weight of methyltri(methylethylketoximino)silane, 1.5˜7 parts by weight of vinyltri(methylethylketoximino)silane, and 1˜7 parts by weight of aminopropyltriethoxysilane; 1.5˜6 parts by weight of delustering agent; and 250˜350 parts by weight of a solvent. The coating has the properties of low viscosity, high flow, relatively fast curing, moderate strength, good adhesion, good mattness, being environmentally friendly and the like.