Plastic sheet or plate with flameproofing means

US5230955A · kind A · utility

Assignees

• Rohm GmbH Chemische Fabrik · DE
• BASF SE

Inventors

• Otto Diroll · Darmstadt, DE
• Klaus Hofmann · Leutershausen, DE
• Uwe Jacobsen · Darmstadt, DE
• Hans Lorenz · Darmstadt, DE
• Gunther Schreyer · Darmstadt, DE
• Peter R. Szigeti · Büttelborn, DE
• Hermann Buchert · Bad Dürkheim, DE
• Wolfgang Eberle · Mainz, DE
• Gerhard Heinz · Bad Dürkheim, DE
• Eckhard M. Koch

Key dates

• Filing date: Mar 20, 1991
• Grant date: Jul 27, 1993
• Expiry date: Mar 20, 2011

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31942
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

Thermoplastically re-formable plastic sheets with flameproofing means, characterized by a core layer 1-10 mm thick comprised of polyether sulfone or a similar thermoplastic, which core material has a content of at least 0.5 wt. %, preferably at least 2 wt. %, of a flame-protective additive, such as boron trioxide; and said sheet or plate further characterized by outer layers, firmly adhering to and covering the two faces of the core layer, at least 0.05 mm thick and comprised of a thermoplastic having a lower proportional content of the flame-protective additives than the core layer; are particularly useful for interior structures in passenger conveyances, such as airplanes.