Illinois Tool Works Inc.
LOW SURFACE ENERGY ACCELERATED BONDING ADHESIVE FORMULATION AND PROCESS FOR THE USE THEREOF

Abstract:

An adhesive two-part formulation is provided that includes an amount of free-radical curable monomers, each of said free-radical curable monomers containing at least one acrylate moiety or at least one methacrylate moiety, a Lewis acid, a thermoplastic resin; and a polymeric impact modifier. Also present in the formulation is an amount of an activator of borane-amine complex, a metal accelerator; and a grafted elastomer with a thermoplastic additive. A process of applying the formulation to a substrate includes mixing together the formulation components such that each part has a storage stability at 50.degree. C. for 30 days where the viscosity at 30 days is within 40% of an initial viscosity. The mixture is applied to the substrate and then allowed to cure to achieve an initial strength of at least 1 MPa lap shear strength within 45 minutes.