Continuous method for producing polypropylene mixtures of increased stress-crack resistance and melt strength

US5883151A · kind A · utility

Assignee

• PCD Polymere Ges. m.b.H. · AT

Inventors

• Manfred Raetzsch · Kirchschlag, AT
• Achim Hesse · Dresden, DE
• Hartmut Bucka · Staprijk, AT
• Norbert Reichelt · Ansfelden, AT
• Ulf Panzer · Ansfelden, AT
• Reiner Mehnert · Markkleeberg, DE

Key dates

• Filing date: Feb 28, 1997
• Grant date: Mar 16, 1999
• Expiry date: Feb 28, 2017

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S522/912
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

Polypropylene mixtures of increased stress-crack resistance and melt strength can be produced by irradiating polypropylene powders with low average particle diameters by low energy electron-beam accelerators with energies of 150 to 300 keV. The polypropylene mixtures produced are suitable particularly for producing films, sheets, panels, coatings, pipes, hollow objects and foamed materials.