Multimodale Polypropylenzusammensetzung mit Hoher Steifigkeit und Hoher Fliessfähigkeit und Verfahren zu Ihrer Herstellung

Details

Veröffentlichungs-Nr.

EP3945112

Aktenzeichen

EP20188952

Anmeldetag

31. Juli 2020

Veröffentlichung

22. Januar 2025

Erteilung

22. Januar 2025

Rechtsraum

EP

IPC

C08L23/12

Abstract

The present invention relates to a multimodal polypropylene composition comprising (A) a first propylene polymer fraction (PP1), and (B) a second propylene polymer fraction (PP2), wherein the first propylene polymer fraction (PP1) and the second propylene polymer fraction (PP2) have different weight average molecular weights, and the multimodal polypropylene composition has (i) a melt flow rate MFR₂ (230°C, 2.16kg, ISO 1133) of from 1 to 500 g/10 min., (ii) a molecular weight distribution (Mw/Mn), determined by gel permeation chromatography according to ISO 16014-1:2003 and ISO 16014-4:2003, of at least 6.0 and not more than 20.0, (iii) an isotacticity index (mmmm pentads) of at least 97 %, measured by ¹³C-NMR, and a xylene soluble fraction (XCS), determined according to ISO 16152; first edition, 2005-07-01 at 25 °C of less than 3.5 wt.%. The invention further provides a process for the production of this composition and its use for the production of molded and extruded articles.

Anmelder

Firmen

Borealis GmbH
Borealis AG

Land

🇦🇹 Österreich

Fachgebiete