Typical Formulation Ingredients
Ingredient
Parts by weight
Monofunctional aliphatic urethane acrylate oligomer (Genomer 4188/EHA, Rahn Energy Company)
Difunctional aliphatic urethane acrylate oligomer (Genomer 4269/M22, Rahn Energy Company)
Polyester Acrylate (03-849, Rahn Energy Company)
Isodecyl acrylate monomer (Miramer M130, Rahn Energy Company)
Difunctional amine acrylate (Genomer 5275, Rahn Energy Company)
Liquid photoinitiator (Genocure LTM, Rahn Energy Company
(Source: Formulation Goals of Energy Curable Pressure Sensitive Adhesives, Rahn USA Corporation, 2006.)
Typical Properties
Static shear strength @ 23°C, Hr
Static shear strength @ 80°C, Hr
Resulting Properties
To maximize the shear and temperature resistance of a PSA, the objective is to increase the crosslink density and overall Tg of the adhesive. This is accomplished in this formulation by replacing a tackifying resin with difunctional acrylate. The increased crosslinking and Tg, however, negatively affect the tack properties.