Pultrudate, production and use thereof

A polyurethane pultrudate consisting of 40-80 vol % of carbon fibers and a polyurethane resin having a density of >1.05 g/cm3, wherein the polyurethane resin is obtained from a reaction mixture consisting of:

• (A) a polyisocyanate component,
• (B) a polyol component consisting of:
• b1) a mixture of at least two polyols,
• b2) 0-20% by weight based on the total weight of (B) of one or more further isocyanate-reactive compounds distinct from b1),
• in the presence of
• b3) 0-5% by weight on the total weight of (B) of one or more catalysts,
• b4) 0-20% by weight based on the total weight of (B) of further assistant and/or additive substances,
• (C) 0.1-8% by weight based on the total weight of (B) of at least one internal release agent,
• wherein the polyisocyanate component (A) comprises:
• 1) >55% by weight based on the total weight of (A) of monomeric diphenylmethane diisocyanate (MDI), wherein
• 2) a sum of 2,2′-MDI and 2,4′-MDI based on the total weight of (A) is <40% by weight, and
• 3) no prepolymer,
• wherein the polyol component (B) is free of any polymer polyol,
• a number-average hydroxyl number of a sum of the components in (B) is ≥400 mg KOH/g and ≤2,000 mg KOH/g,
• a sum of the nominal OH functionalities in (B) has a number-average value between 2.5 and 3.5, and a ratio of the number of NCO groups in (A) to a sum of the number of OH groups in (B) and (C) multiplied by 100 has a value of 90-120.