Sealable multilayer film made of a grafted terpolymer

US6562478B1 · kind B1 · utility

Assignee

• Basell Polyolefine GmbH · DE

Inventors

• David Fischer · Breunigweiler, DE
• Bernd Lothar Marczinke · Frankfurt, DE
• Werner Schone · Schriesheim, DE
• Franz Langhauser · Bad Dürkheim, DE
• Wolfgang Bidell · Mutterstadt, DE
• Roland Hingmann · Ladenburg, DE
• Ulrich Moll · Schnaittach, DE
• Meinolf Kersting · Neustadt, DE
• Gunther Schweier · Osthofen, DE
• Peter J. Jones · Belmont, US

Key dates

• Filing date: Dec 5, 2000
• Grant date: May 13, 2003
• Expiry date: Dec 5, 2020

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31913
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A sealable coextruded film is made from at least one outer layer and from at least one base layer, where the outer layer is composed of a propylene terpolymer comprising from 80 to 99.5 mol % of structural units derived from propylene, from 0.2 to 15 mol % of structural units derived from ethene or from a C4-C6 1-olefin (I) and from 0.3 to 15 mol % of structural units derived from another C4-C12 1-olefin (II) different from the C4-C6 1-olefin (I), and where the propylene terpolymer has been prepared using metallocene catalysts.