Process for the preparation of an UHMWPE homopolymer

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United States of America Patent

PATENT NO 11965052
APP PUB NO 20230322969A1
SERIAL NO

18111025

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Abstract

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A process for the preparation of an ultra-high molecular weight ethylene homopolymer having a MFR21 of 0.01 g/10 min or less, said process comprising:

    (I) prepolymerising at least ethylene at a temperature of 0 to 90° C. in the presence of a heterogeneous Ziegler Natta catalyst to prepare an ethylene prepolymer having an Mw of 40,000 to 600,000 g/mol; and thereafter in the presence of the prepolymer and said catalyst;(II) polymerising ethylene at a temperature of 55° C. or less, such as 20 to 55° C., to prepare said UHMW ethylene homopolymer; wherein the UHMW ethylene homopolymer comprises up to 8 wt. % of said prepolymer.

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Patent Owner(s)

Patent OwnerAddress
BOREALIS AGWAGRAMERSTRASSE 17-19 VIENNA 1220

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kokko, Esa Porvoo, FI 12 34
Rastogi, Sanjay Eindhoven, NL 43 349
Romano, Dario Maastricht, NL 7 45
Ronca, Sara Leicestershire, GB 7 36
Saeed, Irfan Porvoo, FI 12 54
Salo, Mika Porvoo, FI 3 8

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