(19)
(11) EP 3 945 112 A8

(12) CORRECTED EUROPEAN PATENT APPLICATION
Note: Bibliography reflects the latest situation

(15) Correction information:
Corrected version no 1 (W1 A1)

(48) Corrigendum issued on:
27.04.2022 Bulletin 2022/17

(43) Date of publication:
02.02.2022 Bulletin 2022/05

(21) Application number: 20188952.4

(22) Date of filing: 31.07.2020
(51) International Patent Classification (IPC): 
C08L 23/12(2006.01)
(52) Cooperative Patent Classification (CPC):
C08L 23/12; C08L 2205/025; C08L 2207/10; C08L 2314/02
 
C-Sets:
  1. C08L 23/12;
  2. C08L 23/12;
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME
Designated Validation States:
KH MA MD TN

(71) Applicant: Borealis AG
1020 Vienna (AT)

(72) Inventors:
  • Tranninger, Cornelia Anita
    4021 Linz (AT)
  • Lummerstorfer, Thomas
    4021 Linz (AT)
  • Horill, Thomas
    2320 Schwechat-Mannswörth (AT)
  • Gahleitner, Markus
    4021 Linz (AT)
  • Wang, Jingbo
    4021 Linz (AT)
  • Bernreitner, Klaus
    4021 Linz (AT)
  • Berger, Friedrich
    4021 Linz (AT)
  • Leskinen, Pauli
    06101 Porvoo (FI)

(74) Representative: Kador & Partner PartG mbB 
Corneliusstraße 15
80469 München
80469 München (DE)

   


(54) MULTIMODAL POLYPROPYLENE COMPOSITION WITH HIGH STIFFNESS AND HIGH FLOWABILITY AND PROCESS FOR ITS PRODUCTION


(57) 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.