Monofunctional or multifunctional urethane acrylate oligomers without isocyanates

Abstract

An acrylated and/or methacrylated urethane oligomer obtained by reaction of a specific polyamine with a cyclic carbonate compound carrying m cyclic carbonate groups, giving an intermediate product carrying m formed urethane groups which carry residual reactive amine —NH— groups, and subsequently an addition reaction of each of the residual reactive amine groups of the intermediate product with an acrylate group of a compound carrying, in addition to the acrylate group, p additional acrylate and/or methacrylate groups, with each residual reactive amine —NH— group of the intermediate product being thus converted into a carbon-nitrogen bond carrying the acrylate and/or methacrylate groups, and thus production of the urethane oligomer, with the urethane oligomer carrying m urethane groups and m hydroxyl groups and having a functionality in acrylates and/or methacrylates ranging from m*p(n−1) to m*p(2n−2).