Patent ID: 9034135
Filing Date: 2015-05-19
Classification: B21D,B62D,C08G,C09J,Y10T

Abstract:
1. A process for producing a hem flange adhesive bond, comprising at least the steps of: a) applying an adhesive which has a viscosity at 25° C. of >900 Pa·s to an inner panel or to an outer panel, wherein the adhesive contains a spacer, wherein the adhesive is a heat-curing one-component epoxy resin adhesive comprising: at least one epoxy resin A with an average of more than one epoxy group per molecule, at least one hardener B for epoxy resins which is activated by elevated temperature, at least one terminally capped polyurethane prepolymer of formula (I): b) contacting the adhesive with the inner panel or the outer panel; c) flanging the outer panel around the inner panel such that the adhesive is present in the interior of the hem flange; d) pressing the hem flange; and e) introducing thermal energy into the adhesive; wherein step d) or step e) is followed by a step g) of sealing the hem flange with a sealant.