Experimental Analysis on the Curing and Adhesive Behaviour of Standard Moisture-cured and Fast-cured Polyurethanes used in Automotive Industry

The subject of this experimental analysis is the comparison of polyurethane adhesives with regard to the improvement of quality and acceleration of production, which is associated with financial savings. The study was inspired by the real conditions of car window production. A moisture-cured one-component polyurethane adhesive is used as standard. Due to the risk of delamination of the glass, the use of heat-cured adhesives is excluded. In addition to the moisture-curing adhesive, a one-component polyurethane adhesive with a curing accelerator and a two-component polyurethane adhesive were tested. To compare the properties, the curing time and the force required to tear the bracket from the glass were assessed using a pull off test. Based on the results, it can be concluded that the two-component adhesive has the greatest potential, both in terms of curing speed, but also the mixing ratio satisfactory in real production. Ideally, it would be desirable to modify the hardness of the adhesive to make it more suitable for that application. However, the potential for financial savings is great in this type of production.