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Cool coatings can play an important role in reducing global energy consumption and increasing interior comfort. They do this by minimizing solar absorption on a surface whilst maximizing thermal emission. Used in this way, a cool coating is able to reduce the flow of heat from the exterior coated surface into the building, resulting in lower internal temperatures.
Cool coatings can play an important role in reducing global energy consumption and increasing interior comfort. They do this by minimizing solar absorption on a surface whilst maximizing thermal emission. Used in this way, a cool coating is able to reduce the flow of heat from the exterior coated surface into the building, resulting in lower internal temperatures. The reduction in the internal temperature can reduce the need for electricity used to power air conditioning units used for cooling. The benefits for buildings have been quantified in studies produced by Lawrence Berkeley National. Traditionally, white coatings have been used to raise solar reflectance in an exterior coating however, there is a growing need for good solar reflection in bright, vibrant and dark colors. A new pigment is introduced that enables formulators to increase solar reflection in a broad range of colours, especially deep, dark colours1. This new innovation enables solar reflective properties to be created from a single additive. Color can then be created with the use of a wide variety of conventional pigments with guidance on color formulation generated from a proprietary software program. In developing the technology, titanium dioxide crystals have been engineered to optimize the ratio of near infrared reflectance to visible reflectance and encapsulated them in dense silica coating for durability. Finally the product has been treated to give outstanding dispersibility. The presentation will review the potential benefits of cool coatings and how this new solar reflective pigment can improve total solar reflectance when combined with colored pigments in a range of colored coating systems.
The creepage of corrosion underneath a coatings film applied to a steel test panel is often used as a performance test for the anti-corrosion properties of a coating system. Underfilm corrosion creep, also sometimes referred as scribe creep in the laboratory environment, is defined as the degree of corrosion emanating away from a scribe line underneath a coating film applied to a steel substrate.
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Recent polyurea resin technology advances have allowed for the development of value-added polyurea topcoats that are proving to be valuable alternatives for many polyurethane applications. The development of an SSPC specification for a weatherable polyurea topcoat is discussed for the purpose of providing a standard that will be acceptable throughout our industry.
Fluoroethylene vinyl ether (FEVE) resins were developed to overcome some of the problems associated with the use of fluoropolymers in coatings. These resins, which yield topcoats with lifetimes exceeding 60 years, can be cured at ambient temperatures for field applications, or at elevated temperatures in the shop. New FEVE resins have been developed to enable formulators to meet air quality regulations while still producing coatings with excellent durability.