| abstract |
The present invention relates to a method for producing a polyurethane fiber composite material. The method comprises (a) a di- and / or polyisocyanate, (b) a compound having an isocyanate-reactive hydrogen atom, (c) a compound containing at least one carbon-carbon double bond, (d) as required. A catalyst that promotes the urethane reaction, (e) a free radical initiator, if necessary, and (f) a further auxiliary material and additive material, if necessary, mixed into a reaction mixture, simultaneously with the fiber material Moistening and curing. Here, the compound having an isocyanate-reactive hydrogen atom contains an average of 1.5 or more isocyanate-reactive hydrogen groups per molecule, the double bond density of the compound (c) is 21% or more, and the compound (c ) Has a double bond functionality greater than 1, compound (c) has no isocyanate-reactive group, and the isocyanate reaction of di- and / or polyisocyanate (a) with compound (b). The equivalent ratio between the hydrogen atoms is within a range of 0.8-2. The invention further relates to a polyurethane-based fiber composite material obtained by the method of the invention and to a method of using the polyurethane-based fiber composite material as a structural component. |