Process for joining workpieces and composite workpieces obtainable with this, and use of a solution and/or dispersion of a catalyst and an adhesion promoter

摘要

Process for joining at least two workpieces (joint parts) by gluing using a reactive hot-melt adhesive, wherein at least one of the workpieces is treated and/or acted upon with a catalyst influencing the setting behavior and/or the crosslinking of the adhesive before the adhesive is applied, and then the adhesive is applied to at least one of the workpieces and the workpieces are then glued together, with the workpiece to be treated and/or loaded with the catalyst being treated with at least one adhesion promoter (primer), with a photolatent catalyst being used as the catalyst and with the photolatent Catalyst is selected from organometallic compounds, quaternary ammonium compounds and aromatic isocyanates and mixtures thereof, the mass-related ratio of catalyst on the one hand to the dry weight of the adhesion promoter on the other hand being in the range from 20: 1 to 1 : 2,000 and the adhesive is applied to the workpiece with an application weight of 50 to 200 g/m2.