The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 28, 2020
Filed:
Mar. 21, 2012
Emmanouil Spyrou, Schermbeck, DE;
Friedrich Georg Schmidt, Haltern am See, DE;
Eike Langkabel, Wegberg, DE;
Katharina Cielaszyk, Marl, DE;
Sandra Reemers, Münster, DE;
Holger Loesch, Herne, DE;
Elke Gollan, Herne, DE;
Marina Grammenos, Düsseldorf, DE;
Emmanouil Spyrou, Schermbeck, DE;
Friedrich Georg Schmidt, Haltern am See, DE;
Eike Langkabel, Wegberg, DE;
Katharina Cielaszyk, Marl, DE;
Sandra Reemers, Münster, DE;
Holger Loesch, Herne, DE;
Elke Gollan, Herne, DE;
Marina Grammenos, Düsseldorf, DE;
Evonik Operations GmbH, Essen, DE;
Abstract
Provided is a storage-stable polyurethane prepegs and mouldings produced therefrom composed of polyurethane compositions with liquid resin components, preferably liquid polyols. A prepeg contains(A)a fibrous support and (B)a matrix material containing a reactive polyurethane composition. The polyurethane composition contains a mixture of a liquid resin component(b)having a functional group reactive towards an isocyanate and having a glass transition temperature(Tg)or melting point below 25° C., with a hydroxyl number of 50 to 2000 mg KOH/gram, and a curing agent(a)comprising a di- or polyisocyanate internally blocked or blocked with a blocking agent. In addition, the polyurethane composition contains 0.6 to NCO equivalents or 0.3 to 1 uretdione group in (a) for each functional group of (b).