Additives for Adhe-sives in Wood Con-struction Products

The presence of additives in the 1C-PUR adhesives solves the issues regarding the use of primers or wood surface treatment when gluing different wood species. The technology has been successfully tested on beech wood in particular. While additives work well with the tested wood species, the final composition of the 1C-PUR adhesive has to be adapted and tested for each wood species to be used, and the resulting load-bearing timber construction product approved.

This invention allows for the use of different available wood species by adapting the fast-curing 1C-PUR adhesives, which modify the wood interface upon creating an intermediate modified wood layer. The use of additives in the adhesive composition avoids extra production steps, new machinery and longer processing time, making the process cheaper and the products more competitive. Therefore, an enhancement in terms of an increased adhesive performance and lower costs due to the availability of the compatibilizing additive can be achieved.