Development of a Heavy Anti-corrosion Polyurea Coating Modified by Epoxy

In order to improve the corrosion resistance of polyurea materials， heavy anti-corrosion polyurea coatings were prepared by epoxy-modification. The effects of different types of polyol, different NCO contents, different types and contents of epoxy resin on the performance of heavy-duty anticorrosion polyurea coatings were studied. The results showed that epoxy-modified anticorrosion polyurea coatings had relatively good corrosion resistance. In epoxy-modified anticorrosion polyurea coatings, the component A was synthesized by poly THF ether polyols PTMG-1000 and MDI, and NCO content was 16%, epoxy resin E-44 content was 10%; the component B was synthesized by terminal amino polyether D-2000 and T-5000, amine chain extender E-100 and E-300, epoxy resin E-44 content was 15%. Performance comparison was made between epoxy-modified anti-corrosion polyurea and general anti-corrosion polyurea, the results showed that the epoxy-modified anti-corrosion polyurea performance was significantly improved.