Expanding Foam without Secondary Foaming

Due to the easy application and timesaving procedure the current trend is to use expanding foam for mounting doors and window frames as well as filling cavities. The new development widens the use of expanding foams towards the mounting of electric outlets. Up to now electric outlets have been plastered into the wall cavity, which is a time-consuming and painstaking procedure for the craftsmen. The opportunity to fix electric outlets with expanding foam could lead to considerable time savings and simplification of work. Commercially-available polyurethane expandable foams are not suitable because of the slow secondary foaming which make an easy and fast positioning of the outlet in the wall cavity impossible. For this purpose the expanding foam should not exhibit any secondary foaming and should be applicable on-site. The application is not limited to the described one. The foam has additionally fire resistant properties. Insulation consists mainly of foamed plastic (polystyrene, PU) or natural fibers. With the exception of insulation made from mineral wool, these materials are combustible and can contribute to fire propagation. A fire-resistant foam can increase the safety of multistory buildings by preventing fire propagation on the insulation of facades. The new plastic-based foam formulations maintain their dimensions in a fire test without burning themselves. An application for these foams could be insulation panels for facades. The poster describes the current state of development