High functionality aminoacrylate-acrylate urethanes derived from the addition of a secondary-amine amino alcohol to a multifunctional acrylate

Abstract

An aminoacrylate-acrylate urethane comprises at least one urethane function bonded to an aminoacrylate group, this group having a plurality of acrylate groups and being derived from the reaction of a) a hydroxylated aminoacrylate bearing one or more acrylate groups with b) a polyisocyanate. The aminoacrylate a) is produced by the addition of a1) an amino alcohol bearing a hydroxyl group and a secondary amine group to a2) at least one multifunctional acrylate, with a2) being in stoichiometric excess relative to the secondary amine groups of said amino alcohol a1). A method for preparing the urethane acrylate comprises preparing the aminoacrylate a) by a Michael addition reaction. The aminoacrylate-acrylate urethane may be used in curable compositions, more particularly as a synergist, and also to cured finished products from the urethane acrylate.