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EP0433986A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Process for preparing a polypropylene molding composition

Assignee: Hoechst AG
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Filing: 1990-12-18
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Granted: —
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Expires: 2010-12-18
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Abstract

Abstract Translated from German Durch Copolymerisation von Propylen mit Ethylen oder einem 1-Olefin der Formel R<a>-CH=CH-R<b> in Gegenwart eines Katalysators bestehend aus einem Metallocen der Formel I <IMAGE> worin M¹ Titan, Zirkon, Hafnium, Vanadium, Niob oder Tantal ist, und einem Aluminoxan erhält man eine Polypropylen-Formmasse mit syndiotaktischen Polymerketten in hoher Ausbeute. Diese Formmasse weist eine sehr hohe Molmasse, eine sehr enge Molmassenverteilung und eine sehr hohe Syndiotaxie auf. Aus der Formmasse hergestellte Formkörper zeichnen sich durch hohe Transparenz, Flexibilität, Reißfestigkeit und exzellenten Oberflächenglanz aus. By copolymerization of propylene with ethylene or a 1-olefin of the formula R <a> -CH = CH-R <b> in the presence of a catalyst consisting of a metallocene of the formula I <IMAGE> in which M¹ is titanium, zirconium, hafnium, vanadium, Is niobium or tantalum, and an aluminoxane gives a polypropylene molding composition with syndiotactic polymer chains in high yield. This molding compound has a very high molar mass, a very narrow molar mass distribution and a very high syndiotaxy. Moldings made from the molding compound are characterized by high transparency, flexibility, tear resistance and excellent surface gloss.

Inventors

  • 👤 Andreas Dr. Winter
  • 👤 Volker Dr. Dolle
  • 👤 Jürgen Dr. Rohrmann
  • 👤 Walter Dr. Spaleck
  • 👤 Martin Dr. Antberg

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-31 16:07
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/10; C08F; C08F297/00; C08F297/06; C08F297/08; C08F297/083; C08L23/14; C08L23/142; C08L23/16; C08L2308/00; Y; Y10; Y10S; Y10S526/00; Y10S526/943

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