Invention Grant
- Patent Title: Process for preparing propylene copolymers
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Application No.: US15538899Application Date: 2015-12-28
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Publication No.: US10266624B2Publication Date: 2019-04-23
- Inventor: Wilfried Toltsch , Luigi Resconi
- Applicant: BOREALIS AG
- Applicant Address: AT
- Assignee: BOREALIS AG
- Current Assignee: BOREALIS AG
- Current Assignee Address: AT
- Agency: Tarolli, Sundheim, Covell & Tummino LLP
- Priority: EP14200692 20141231
- International Application: PCT/EP2015/081290 WO 20151228
- International Announcement: WO2016/107847 WO 20160707
- Main IPC: C08F210/06
- IPC: C08F210/06 ; C08J5/18

Abstract:
The present invention relates to an olefin polymerization process, wherein propylene and 1-butene and optionally ethylene are reacted in the presence of a Ziegler-Natta catalyst system so as to obtain a polypropylene, wherein the polypropylene comprises 1-butene-derived comonomer units in an amount of from 0.5 to 15 wt % and optionally ethylene-derived comonomer units in an amount of up to 3 wt %, and the Ziegler-Natta catalyst system comprises an external donor of the formula (I) (R3)z(R2O)YSi(R1)X (I).
Public/Granted literature
- US10696764B2 Process for preparing propylene copolymers Public/Granted day:2020-06-30
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