Polyurea
Properties and Applications
Polyureas are reaction products of isocyanates and amines. These resin systems often compete with polyurethanes in similar coating applications. Like urethanes, they exhibit high flexibility, durability, and chemical resistance which are superior to those of most polyurethanes. They also have higher heat resistance than comparable formulated polyurethanes. Another key advantage of amine/isocyanate reactions is fast and reliable cure, whereas the cure of polyurethanes typically requires a catalyst and carefully controlled processing parameters such as temperature and humidity.
Polyureas are very resilient to water and have low water permeability, which makes these resins ideal for moisture barrier applications. The most important application of polyureas are industrial spray coatings and elastomers used in severe environments including exposure to hydrocarbons, chlorinated and salty water, diluted acids and bases, motor oil, and hydrogen sulfide gas. However, long term exposure to these chemicals may affect the performance and should be first tested. Most of the formulated polyurea spray coatings provide very fast cure even at temperature extremes of about 0°F up to +250°-300°F.
Manufacturers & Distributors
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