Typical Formulation Ingredients
Ingredient
Parts by weight
Monofunctional aliphatic urethane acrylate oligomer (Genomer 4188/EHA, Rahn Energy Company)
Tackifier, modified polyester resin (Co-Resin 02-819/M22, Rahn Energy Company)
Diluent, isodecyl acrylate monomer (Miramer M130, Rahn Energy Company)
Difunctional amine acrylate (Genocure 5275, Rahn Energy Company)
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 obtain higher peel properties, the Genomer 4188/EHA content is maximized for its elastic characteristics. This enables a large extension of the adhesive during removal which provides strong adhesion in a PSA. Inert Co-Resin 02-819/M22 is incorporated as the tackifying resin which exhibits a relatively high Tg, +12ºC. In addition, the difunctional Genomer 5275 is incorporated to add a degree of crosslinking. The combination of increased crosslinking, Tg, and elasticity of the adhesive brings about the improvement in peel performance.