MULTIMODAL POLYETHYLENE COMPOSITION WITH IMPROVED HOMOGENEITY

The present invention concerns a multimodal polyethylene composition comprising a base resin comprising three ethylene homo- or copolymer fractions (A), (B) and (C) with different weight average molecular weight MW, wherein a) fraction (A) has an MFR21 equal or lower than 20 g/l0min, b) fraction (B)...

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Bibliographische Detailangaben
Hauptverfasser:	VAN PRAET ERIC, BACKMAN MATS, GUSTAFSSON BILL, VAN MARION REMKO
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:	The present invention concerns a multimodal polyethylene composition comprising a base resin comprising three ethylene homo- or copolymer fractions (A), (B) and (C) with different weight average molecular weight MW, wherein a) fraction (A) has an MFR21 equal or lower than 20 g/l0min, b) fraction (B) has a lower weight average molecular weight than fraction (C), c) fraction (C) has a lower weight average molecular weight than fraction (A), d) the composition has a viscosity at a shear stress of 747 Pa (eta747) of 350 kPas or higher, and e) the composition has a MFRS of 0.15 g/l0min or higher and a white spot area of 1 % or below. Furthermore, the present invention relates to a process for the production of such a composition as well as to the use of such a composition for the production of a pipe, for moulding applications, and wire and cable applications.