Aromatic diamine epoxy resin curing agent, anticorrosive coating and preparation method and coating process thereof

Abstract

This invention belongs to the field of polymer material preparation and coating technology, specifically relating to an aromatic diamine epoxy resin curing agent, an anti-corrosion coating, and their preparation method and coating process. The aromatic diamine provided by this invention is prepared by a nucleophilic substitution reaction of aromatic diol, aromatic halide, and p-hydroxyaniline. In the aromatic diamine structure, the benzene ring and sulfone group ensure good molecular stability, while the abundant ether bonds improve the flexibility of the diamine molecule. The aromatic diamine can be used as a curing agent for epoxy resins; its flexible molecular structure and low amino content can alter the structure of the epoxy cured product and appropriately reduce the crosslinking density, thereby enhancing the toughness and mechanical properties of the epoxy cured product. This invention also uses the aromatic diamine, epoxy resin, filler, and diluent to prepare an epoxy resin anti-corrosion coating, which exhibits excellent anti-corrosion performance on metal substrates.

Images