Rigid polymer foams obtained by Michael's aza addition

Abstract

The invention relates to a process for preparing a rigid or semi-rigid foam, comprising reacting, in the presence of a blowing agent, with: - at least one polyfunctional acrylate; and - at least one polyamine, wherein, in the reaction medium of step (E): (i) the polyfunctional acrylates comprise at least 3 acrylate groups; and (ii) the polyamines comprise from 5 to 8 NH bonds present in primary or secondary amine groups. Figure for the abstract: None