Plastic composites made from incompatible plastics

US6773255B2 · kind B2 · utility

Assignee

• Roehm GmbH Chemische Fabrik · DE

Inventors

• Volker Benz · Kelsterbach, DE
• Hans Lorenz · Darmstadt, DE
• Michael Meier-Kaiser · Pfungstadt, DE
• Michael Muller · Harper Woods, US
• Klaus E. Pohlmann · Darmstadt, DE

Key dates

• Filing date: May 15, 2001
• Grant date: Aug 10, 2004
• Expiry date: Oct 17, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/24942
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

Multilayer plastic composites containing at least two incompatible plastics, A and B, in which the layering sequence alternates between A and B, the layers of plastic B are discontinued at regular intervals, and the resulting gaps in the layers are filled in with plastic A, exhibit good adhesion between the layers. In preferred embodiments of the invention, the amorphous, crystalline, or semi-crystalline plastic B has a higher coefficient of thermal expansion than the amorphous plastic A. The plastic composite is preferably produced via coextrusion.