Organometallic Composite Coating for Adhesion and Weather Resistance
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Solution Overview
Problem
Existing antifouling hard coat compositions for moving objects like railroad cars and automobiles suffer from low adhesive strength to metallic surfaces, leading to peeling and deterioration, and lack sufficient weather resistance, especially when exposed to outdoor conditions.
Innovation Solution
A protective member is formed using an organic-inorganic composite material with an organometallic complex, which provides enhanced adhesiveness and weather resistance by chemically bonding organic and inorganic components at the molecular or nanometer level, preventing peeling and improving durability against environmental factors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a water-repellent antifouling hard coat is formed on the surface of a moving object, then the antifouling property is improved, but the adhesive strength to the base material decreases causing peeling
Solution Approach 1:
The patent employs composite coating materials that integrate multiple functional components: organometallic complexes provide strong chemical bonding to metallic substrates, while organic-inorganic composite materials contribute water-repellent and antifouling properties. This composite approach allows simultaneous achievement of high adhesive strength and effective antifouling performance without peeling issues
Solution Approach 2:
The patent modifies the chemical and physical parameters of the coating system by using organometallic complexes with specific molecular structures that can form strong chemical bonds with metal surfaces. The coating composition parameters are optimized to balance adhesion promotion and water-repellent functionality, resolving the contradiction between these two properties
2Reliability
If a hard coat with water repellency is applied to improve antifouling, then stain resistance is improved, but adhesive strength to adhesive materials decreases causing sheet peeling
Solution Approach 1:
The patent creates different functional zones within the coating system: the底层 (base layer) uses organometallic complexes optimized for strong adhesion to both the metal substrate and sheet materials, while the top layer incorporates organic-inorganic composites that provide water-repellent and antifouling properties. This local differentiation allows the coating to exhibit both strong adhesiveness and effective stain resistance
3Reliability
If a protective film is formed on the surface of a moving object, then antifouling protection is provided, but weather resistance is insufficient causing deterioration under outdoor exposure
Solution Approach 1:
The patent uses composite coating systems where organometallic complexes provide durable chemical bonding and corrosion resistance, while organic-inorganic composite materials contribute UV stability and weathering resistance. This composite structure enables the protective film to maintain both antifouling properties and weather resistance under prolonged outdoor exposure
Solution Approach 2:
The coating system incorporates UV absorbers, antioxidants, and other stabilizing agents that preemptively protect the coating from degradation by sunlight, rain, and other environmental factors. This beforehand cushioning approach prevents deterioration before it occurs, ensuring long-term durability under outdoor conditions
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 achieves excellent adhesiveness and weather resistance, reducing the likelihood of peeling and maintaining antifouling properties over time, even under harsh outdoor conditions, thereby extending the service life of moving objects.
Implementation Method 1
chemically bonding organic and inorganic components at the molecular or nanometer level
Implementation Method 2
excellent weather resistance, a moving object using the same, and a method for forming a protective member
Data Source
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AI summary
The invention relates to moving object comprising a metallic material surface without pigment included paint film; and a protective member covering the metallic material surface, wherein the protective member comprising an organic-inorganic composite material containing an organic component and an inorganic component, and an organometallic complex. It is proposed that in the organometallic complex, a central metal element to which an organic compound binds as a ligand is at least one element selected from the group consisting of zirconium, titanium, zinc, aluminum, nickel, cobalt, iron, manganese, and vanadium, wherein said organometallic complex is of one of the following types: - zirconium tetraacetylacetonate, - zirconium tributoxy monoacetylacetonate, - zirconium dibutoxy bis-ethylacetoacetate, - titanium tetraacetylacetonate, - titanium diisopropoxy bis-acetylacetonate, - titanium isopropoxy bis-ethylacetoacetate, - titanium di-2-ethylhexoxy bis(2-ethyl-3-hydroxyhexoxide), titanium 1,3-propanedioxy bis-ethylacetoacetate, - zinc bis-acetylacetonate, - aluminum tris-acetylacetonate, - nickel bis-acetylacetonate, - cobalt bis-acetylacetonate, - iron bis-acetylacetonate, - iron tris-acetylacetonate, - manganese bis-acetylacetonate, or - vanadium bis-acetylacetonate or a mixture of a plurality of said types. The invention further relates to a method for forming a protective member as defined above.