Hybrid component part comprising a local stiffening composed of a two-stage-crosslinked polyurethane-based fibre composite material

US10245789B2 · kind B2 · utility

Assignee

• EVONIK DEGUSSA GMBH · DE

Inventors

• Christina Cron · Velbert, DE
• Marina-Elena Schmidt · Gelsenkirchen, DE
• Tobias Gutmann · Dorsten, DE
• Uwe Stapperfenne · Uerdingen, DE
• Sandra Reemers · Munster, DE
• Leif Ickert · Düsseldorf, DE

Key dates

• Filing date: Sep 2, 2016
• Grant date: Apr 2, 2019
• Expiry date: Oct 4, 2036

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2375/06
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

The invention relates to a hybrid component part comprising a local stiffening made of a two-stage-crosslinked polyurethane-based fiber composite material, more particularly to the production of such a hybrid component part. Said invention has for its object to specify a technology which makes it possible in cost-effective fashion to effect local stiffening of metal parts with a fiber composite material in order thus to obtain a hybrid component part. It is a fundamental concept of the process according to the present invention to use a particular polyurethane formulation which in a first crosslinking reaction can be converted into a thermoplastic polymer and later in a second crosslinking reaction is fully crosslinked to afford a thermoset matrix material. The thermoplastic polymer is characterized by a good adhesion to metal surfaces. The metal can be subjected to further forming with the attached thermoplastic material. The polyurethane is subsequently thermosettingly cured and achieves its final stiffness.