Preparation of a thermoset resin system suitable for the preparation of fibre reinforced prepreg, the prepreg obtainable from the resin system, and its applications

摘要

The present invention relates to polyisocyanate-based impregnating resin system, which is a liquid polyisocyanate mixture, containing more than 50 % by weight MDI based di- and polyisocyanates, and one or more, originally powdery inorganic hydroxides. The resin system of the invention is suitable for the preparation of prepregs. The invention relates also to the prepreg that can be manufactured with the use of the resin system, and use thereof. Among the uses of the invention one important is the use of the prepreg for lining chimneys.