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Brief Background Throughout the last decades, coatings science has incorporated very versatile inorganic materials into organic coating to form the inorganic/organic hybrid coating systems. Combining various organic and inorganic constituents in combination with different preparation and processing methods, very versatile materials can be produced for optical, structural and coatings applications. The hybrid products have combined the properties of the inorganic materials, i.e., hardness, durability, and thermal stability, and organic polymers, i.e., flexibility and toughness.
Brief Background Throughout the last decades, coatings science has incorporated very versatile inorganic materials into organic coating to form the inorganic/organic hybrid coating systems. Combining various organic and inorganic constituents in combination with different preparation and processing methods, very versatile materials can be produced for optical, structural and coatings applications. The hybrid products have combined the properties of the inorganic materials, i.e., hardness, durability, and thermal stability, and organic polymers, i.e., flexibility and toughness. Our group has studied polyurea and polyurethane organic/inorganic films using different sol-gel precursors such as organo-functional alkoxysilanes or non-functional organo-alkoxysilane. In this system, polyurethane provides the general mechanical properties and polysiloxane functions as an adhesion promoter and corrosion inhibitor. Similarly, they also prepared alkoxysilane oligomer modified epoxide primers, which also bears improved good adhesion to the substrate and corrosion protection.
Composite coatings are a class of materials that are described as fiber-reinforced polymers (FRP) that consist of extremely strong tensile fibers saturated in a binding resin. From the original development as tank bottom lining materials designed to handle surface movement and corrosion, the applications for composite coatings have broadened and moved into the mainstream, with industry-accepted design codes written around their uses and applications.
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Lowering the volatile organic content (VOC) of industrial coatings has become a requirement in many reformulation and new coating development efforts, oftentimes in order to meet increasingly strict regulations. Driving VOC to lower levels and performance to higher levels can also offer a more sustainable coatings solution for the end-user. Lowering VOC and maintaining (or improving upon) high performance is often the goal when developing a new formulation, but the two objectives can be at odds with each other.
Coal tar enamel provides an extremely long service life, under the right conditions. The Bureau of Reclamation (Reclamation) has observed more than 80 years of corrosion protection at facilities such as Hoover Dam. The coal tar enamel linings in penstocks and outlet works that are buried, encased, or in tunnels maintain excellent condition with minor damage. However, when temperature fluctuates between hot and cold, the enamel is stressed and develops alligator cracking.