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The use of nanotechnology for enhanced coating performance has come to market for a number of applications. Such coatings cover the range from self-assembly of liquid coatings into multilayer coatings or patterned coating films, to use of various additives.
The use of nanotechnology for enhanced coating performance has come to market for a number of applications. Such coatings cover the range from self-assembly of liquid coatings into multilayer coatings or patterned coating films, to use of various additives. The horizon for improved performance includes a full range of properties from the range of additive materials: better gloss retention, scratch resistance, reduced crack propagation, better electrical conduction, enhanced color options, higher temperature performance, low dirt pickup, and antifoulant activity. Approaches, enhancements, and drawbacks to use of various nanomaterials is discussed in this presentation. Nanotechnology should be viewed primarily as a tool in the formulator’s toolbox, to give improved performance, rather than a separate goal.
The moisture vapor emission rate (MVER) of concrete floors affects the selection of flooring materials for both new construction and remodel projects. The MVER is determined by exposing a 20” x 20” test area to calcium chloride for 60 to 72 hours.
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Traditional organic coatings which provide cathodic protection such as zinc-rich coatings exhibit several major drawbacks. To achieve electrical conductivity zinc-rich coatings rely on tangential contact between zinc dust particles. This results in over pigmentation of the binder exceeding the critical pigment volume concentration of the resin system. This results in an inferior coating with poor physical and mechanical properties.
With increased demands placed on anti-corrosion primer coatings, whether solvent or water based, formulators are continually searching for ways to improve performance. Anti-corrosion, suspension of heavy pigments and fillers, achieving high film build, improving mechanical strength are properties which are desired to impart improved protection and can stability in severe environments.