Reactive adhesive with a low monomer content and with multistage hardening

摘要

A reactive adhesive with a low monomer content and multistage hardening is provided. The adhesive can be solventless or solvent containing, and is a mixture of a polyurethane prepolymer (A) with a low content of monomeric isocyanate and having at least one functional group reactive with a composition containing at least one acidic hydrogen atom and at least one compound (B) containing a functional group polymerizable by irradiation. The adhesive composition can contain photoinitiators, hardeness and additives. The reactive adhesive is cured by UV radiation or electron bean radiation and by reaction of free isocyanate groups with the compositions containing at least one acidic hydrogen atom.