Patent ID: 8916020
Filing Date: 2014-12-23
Classification: B32B,C08L,C09J

Abstract:
1. A method of preparing an assembly comprising at least one substrate having an exposed surface with a designated surface area to be bonded to a structural adhesive wherein said surface area comprises at least one metal, the method comprising the steps of (i) applying a wet film of a liquid activator continuously or discontinuously to said surface area of the substrate, wherein at least 90 weight percent of the liquid activator is an oil-displacing compound comprising butyl lactate, isopropyl myristate, methyl oleate, dibutyl maleate, dibutyl adipate, terpene, terpene oxide but excluding β-pinene oxide, or glycidyl ether having a branched or unbranched carbon chain with 1 to 10 carbon atoms; and (ii) applying a precursor of the structural adhesive to the wet film directly after application of the liquid activator, wherein the precursor comprises an epoxy resin.