With the chemically curing one-part adhesives, as with the multi-component adhesives, chemical reactions between resin monomers and curing agents are responsible for the structure of the polymer. But in contrast to the multi-component adhesives they react and harden without another component like aktivator or curing agent. One-part adhesives harden via a chemical reaction with an external energy source, such as radiation, heat, and moisture.
The individual components of a multi-component adhesive are not adhesive by nature. The individual components react with each other after being mixed and show full adhesion only on curing. The multi-component resins can be either solvent-based or solvent-less. The solvents present in the adhesives are a medium for the polyester or the polyurethane resin. The solvent is dried during the curing process..