Polyether amine (PEA) is a class of polymers with a polyether structure in the main chain and an amine group in the terminal active functional group. There are end-amino polypropylene oxide ether and end-amino polyethylene oxide ether, etc., the molecular structure contains ether bonds, a flexible curing agent. Polyether amines are widely used in many fields such as polyurea coating, large composite materials, and epoxy resin curing agent and automobile gasoline detergent.