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:
Sep. 11, 2018
Filed:
Feb. 26, 2014
Emmanouil Spyrou, Schermbeck, DE;
Guenter Schmitt, Darmstadt, DE;
Friedrich Georg Schmidt, Haltern am See, DE;
Sandra Reemers, Muenster, DE;
Birte Olland, Essen, DE;
Michael Spittler, Duesseldorf, DE;
Holger Loesch, Herne, DE;
Emmanouil Spyrou, Schermbeck, DE;
Guenter Schmitt, Darmstadt, DE;
Friedrich Georg Schmidt, Haltern am See, DE;
Sandra Reemers, Muenster, DE;
Birte Olland, Essen, DE;
Michael Spittler, Duesseldorf, DE;
Holger Loesch, Herne, DE;
EVONIK DEGUSSA GmbH, Essen, DE;
Abstract
The invention relates to a process for producing storage-stable polyurethane prepregs and to moldings (composite components) produced therefrom. The prepregs and, respectively, components are produced by mixing (meth)acrylate monomers, (meth)acrylate polymers, hydroxy-functionalized (meth)acrylate monomers and/or hydroxy-functionalized (meth)acrylate polymers with uretdione materials. Photoinitiators can also optionally be added. This mixture or solution is applied by known processes to fiber material, e.g. carbon fibers, glass fibers or polymer fibers, and is polymerized with the aid of radiation or of plasma methods. Polymerization, e.g. at room temperature or at up to 80° C., gives thermoplastics or thermoplastic prepregs, and these can subsequently also be subjected to forming processes. The hydroxy-functionalized (meth)acrylate constituents can then be crosslinked with the uretdiones already present within the system, by use of elevated temperature. It is thus possible to produce dimensionally stable thermosets or dimensionally stable crosslinked composite components.