ABSTRACT
Polyureas, as the name suggests, are closely related to polyurethanes. Both polyureas and polyurethanes are based on a two-component system, with one component being an isocyanate material. Polyureas’ second component is a polyether polyamine, whereas polyurethanes’ second component is a polyether polyol. Polyurethanes require a catalyst to speed up the reaction time of the components, whereas polyureas do not. The polyurethane reaction is sensitive to low temperatures and moisture due to the addition of catalysts. Low temperatures inhibit the reaction time. Moisture interferes with the reaction by creating carbon dioxide, which causes blistering in the polyurethanes. Polyureas, on the other hand, require no catalyst, so they are able to cure at any temperature and in the presence of moisture. The fast curing ability of polyureas is inherent in their chemistry, which gives them several unique advantages.
