Polyaspartic
Polyaspartic ester chemistry was first introduced in the early 1990s making it a relatively new technology.[1][2][3] The patents were issued to Bayer in Germany and Miles Corporation in the United States. It utilizes the aza-Michael addition reaction.[4][5] These products are then used in coatings, adhesives, sealants and elastomers.[6] Pure polyurea reacts extremely quickly making them almost unusable without plural component spray equipment. Polyaspartic technology utilizes a partially blocked amine to react more slowly with the isocyanates and thus produce a modified polyurea. The amine/diamine or even triamine functional coreactant for aliphatic polyisocyanate is typically reacted with a maleate. Polyaspartic esters (PAE)[7] initially found use in conventional solvent-borne two-component polyurethane coatings.