The concept of Polyurea spray elastomer technology was introduced about 20 years ago by chemists at Texaco Chemical Company (now Huntsman Corporation) in Austin, Texas. This new application was based on the reaction of an isocyanate component with an amine blend to produce a Polyurea elastomer system. Since this seminal work, a number of advances in both the chemistry and application equipment for Polyurea have enabled Polyurea elastomer coatings to compete with (and often displace) their traditional counterparts in the commercial arena.
The catalyst-free isocyanate/amine reaction is normally rapid, proceeding to completion within a few seconds. Working times (“gel times”) generally fall within the sub-five-second range, thus requiring specialized mixing and application equipment. High pressure two-component spray machines equipped with impingement mixing have proven efficient and entirely adequate for sufficient blending and rapid dispensing of the polyurea raw materials. It is chiefly this equipment that allows polyurea technology to venture outside of the realm of Reaction Injection Molding (RIM).