Polyurethane polyisocyanurate resins for pultrusion continuous fibercomposites with a stable and long shelf-life

Abstract

Disclosed is a process for producing a pultruded polyurethane-polyisocyanurate-fiber composite part, including obtaining a reaction mixture by mixing (A) an isocyanate-reactive component comprising a polyol having an average functionality of 1.8 to 5.0 and a hydroxyl number of 200 to 500, and alkali metal catalyst obtainable by introducing an alkali metal salt or alkaline earth metal salt into a compound R—NH—CO—R′ containing urethane groups, with R being not hydrogen and/or not COR″ and (B) an isocyanate component including at least one isocyanate compound, and a compound containing one or more epoxide groups; and impregnating at least one fibrous reinforcing agent with the reaction mixture to obtain the pultruded polyurethane-polyisocyanurate-fiber composite part.

Dependencies are inferred from the claim text.