Composite semifinished products, molded parts produced therefrom, and molded parts produced directly based on hydroxy-functionalized (meth)acrylates, which are cross-linked by means of uretdiones in a thermosetting manner

US9878500B2 · kind B2 · utility

Assignee

• EVONIK DEGUSSA GMBH · DE

Inventors

• Guenter Schmitt · Darmstadt, DE
• Sandra Reemers · Munster, DE
• Emmanouil Spyrou · Schermbeck, DE
• Heike Heeb · Niederrodenbach, DE
• Stephan Kohlstruk · Marl, DE
• Friedrich Georg Schmidt · Haltern am See, DE
• Elke Gollan · Herne, DE

Key dates

• Filing date: Dec 1, 2011
• Grant date: Jan 30, 2018
• Expiry date: Oct 2, 2033

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T442/2992
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

Provided is a prepreg composed of a fibrous substrate impregnated with a reactive or highly reactive polymer composition as a matrix material. The reactive or highly reactive polymer composition contains a (meth)acrylate-based resin comprising at least one of a hydroxyl group, an amine group, a thiol group, an initiator and/or accelerator, and a di- or polyisocyanate which has been internally capped, capped with a capping agent, or a combination thereof. The (meth)acrylate-based resin contains from 20% by weight to 70% by weight of at least one (meth)acrylate monomer and from 1% by weight to 50% by weight of at least one prepolymer.