Energy-curable pressure-sensitive adhesives and process for producing pressure-sensitive adhesive stock.

摘要

A radiation-curable, pressure-sensitive-adhesive is formed of at least one monomer having a glass-transition temperature greater than about -25 DEG C and an entanglement molecular-weight less than about 20,000; at least one monomer having a glass-transition temperature less than about -25 DEG C and an entanglement molecular-weight greater than about 20,000; and at least one tackifier monomer having a glass-transition temperature greater than -25 DEG C and an entanglement molecular-weight of at least about 20,000 and present in an interpolymerized amount sufficient to form an interpolymer having a glass-transition temperature less than about -25 DEG C and an entanglement molecular-weight greater than about 20,000. Cure is preferably by electron beam radiation, and a multifunctional monomer is preferably provided to improve shear, such monomer for example being pentaerythritol triacrylate, tetraethyleneglycol dimethacrylate or trimethylol propane trimethacrylate.