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 M w , wherein a) fraction (A) has an MFR 21 equal or lower than 20 g/10min, b) fraction...

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Bibliographic Details
Main Authors VAN PRAET ERIC, BACKMAN MATS, VAN MARION REMKO, GUSTAFSSON BILL
Format Patent
LanguageChinese
English
Published 24.11.2010
Subjects
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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Summary: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 M w , wherein a) fraction (A) has an MFR 21 equal or lower than 20 g/10min, 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 an eta 747 of 350 kPas or higher, and e) the composition has a MFR 5 of 0.15 g/10min 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.
Bibliography:Application Number: CN200580033876