Typical Formulation Ingredients
Phase
Ingredient
Parts by weight
A
Methyl methacrylate (MMA, Evonik)
A
Methacrylic acid (MAS, Evonik)
A
Dimethacrylate, crosslinker (SR206, Sartomer)
A
Cumene hydroperoxide (Luperox® CU90, Atofina)
A
Disulfonated polyethylene (HYPALON® 20, DuPont)
B
Aniline butyraldehyde (e.g., VANAX® 808 HP, R.T. Vanderbilt Company, Inc.)
Resulting Properties
The cure of acrylic adhesives is initiated by a two-part redox reaction system. One component of the redox reaction is present in the base component of the adhesive, and the second component is present in the accelerator or “curing” component. This formulation describes a typical formulation for a reactive, no-mix acrylic adhesive. Besides the usual ingredients, the formulation contains a small quantity of acrylic acid and a crosslinker for improving heat resistance. The relatively high amount of elastomer confers good impact resistance. Various tougheners have been used in thermosetting acrylic adhesives. Strong acids such as acrylic, methacrylic, or maleic acid are used to enhance adhesion to metal and plastic surfaces.
-
High tensile shear and peel strength especially on hard-to-bond plastics
-
High chemical resistance, exceptions are polar solvents, such as acetone, and strongly acidic or alkaline solutions
-
Good impact strength due to rubber toughened