Toughened thermosetting structural materials

US5242748A · kind A · utility

Assignee

• BASF SE

Inventors

• Thomas Folda · Collierville, US
• Jack D. Boyd · Westminster, US
• Helmut Tesch · Bad Dürkheim, DE
• Thomas Weber · Ludwigshafen, DE
• Hans-Gert Recker · Ludwigshafen, DE

Key dates

• Filing date: Jan 4, 1989
• Grant date: Sep 7, 1993
• Expiry date: Jan 4, 2009

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T442/3585
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The incorporation of 2 to 25 .mu.m particles of a limited class of polyimides having appreciable nonaromatic character into heat curable epoxy resin systems significantly increases the toughness of such systems without loss of other desirable properties. These toughened epoxy resin systems are useful in preparing carbon fiber reinforced composites having compression strength after impact (CAI) of greater than 45 Ksi after a 1500 in-lb/in impact.