Lightfast polyurethane prepregs and fiber composite elements produced therefrom

US10167369B2 · kind B2 · utility

Assignee

• Covestro Deutschland AG · DE

Inventors

• Marcel Schornstein · Neuss, DE
• Florian Hupka · Mülheim an der Ruhr, DE
• Dirk Wegener · Bielefeld, DE
• Harald Rasselnberg · Dormagen, DE

Key dates

• Filing date: Aug 25, 2015
• Grant date: Jan 1, 2019
• Expiry date: Aug 25, 2035

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2375/04
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

The present invention relates to storage-stable prepregs (preimpregnated fibers) on the basis of lightfast, low-viscous polyurethane systems with an increased characteristic number and flat fiber composite components (molded bodies; composite compounds) produced therefrom, which can be obtained by methods of impregnation of, for example, woven fabrics and laid scrims, and to a method for the production thereof. The polyurethane system can comprise a reaction product of a reaction mixture of an isocyanate component and a polyol formulation. The isocyanate component comprises an organic isocyanate. The polyol formulation comprises a polyol component, a dianhydrohexitol, a latent catalyst, and optionally auxiliaries and/or additives.