Currently, the adhesives in use are all multi-component synthetic resin adhesives, as single-component adhesives can no longer meet the requirements in application. Synthetic adhesives consist of a main agent and auxiliary agents. The main agent is also called the base material, matrix or adhesive material; auxiliary agents include curing agents, thinners, plasticizers, fillers, coupling agents, initiators, thickeners, anti-aging agents, polymerization inhibitors, stabilizers, complexing agents, emulsifiers, etc. Depending on requirements and applications, they can also contain components such as flame retardants, foaming agents, defoamers, colorants and mildew inhibitors.