| abstract |
The present invention relates to a method for producing a storage-stable polyurethane prepreg and a molded article (composite material member) produced from the prepreg. For the production of this prepreg or component, for example, (meth) acrylate monomers, (meth) acrylate polymers, hydroxy-functionalized (meth) acrylate monomers and / or hydroxy-functionalized (meth) acrylates The polymer is mixed with the uretdione material. In some cases, a photoinitiator may be further added. This mixture or solution is applied to fiber materials, such as carbon fibers, glass fibers or polymer fibers, by known methods and polymerized using radiation or by application of plasma. For example, polymerization at room temperature or up to 80 ° C. produces a thermoplastic or thermoplastic prepreg, which can be further deformed later. The hydroxy-functionalized (meth) acrylate component can subsequently be crosslinked at elevated temperatures with uretdione already present in the system. Thus, a shape-stable thermosetting resin or a cross-linked composite material member can be produced. |