TWO-COMPONENT POLYURETHANE ADHESIVE FOR WOODEN MATERIALS

摘要

The invention relates to a polyurethane adhesive, based on a polyol componen t A that consists of a) 10 to 98 wt. % of at least one oleochemical polyol, b) 1 to 7.5 wt. % of at least one diol with a hydroxyl value of between 400 and 2000 and c) 1 to 7.5 wt. % of at least one trifunctional, tetrafunctional or pentafunctional polyol with a hydroxyl value of between 200 and 2000, whereb y the wt. % in each case is in relation to the total polyol mixture, and the polyisocyanate component B), whereby the NCO/OH ratio of the components A an d B) lies in the region of between 1.5 and 0.9. The addition of between 0 and 60 wt. %, in relation to the total polyol mixture, of a homogenously dissolved resin to the polyol component significantly increases the adhesion, which hardly diminishes after curing for 24 hours and drying for 7 days at 60 C. T he adhesive is therefore suitable for load-bearing components consisting of woo d.