Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Johanna Lilja0
Pauli Leskinen0
Jingbo Wang0
Markus Gahleitner0
Date of Patent
March 19, 2019
0Patent Application Number
155785990
Date Filed
June 10, 2016
0Patent Citations Received
Patent Primary Examiner
Patent abstract
The present invention relates to a process for producing polypropylene polymer composition by polymerizing propylene with a C4 to C8 a-olefin comonomer and with ethylene in a sequential polymerization process with at least two reactors connected in series in the presence of a solid Ziegler-Natta catalyst component being free of external carrier material and any phthalic compounds, and wherein the C4 to C8 a-olefin comonomer content in the propylene polymer composition is at least 4.5 wt-%.
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