Invention Grant
- Patent Title: High melt strength polypropylenes with improved processability
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Application No.: US16477463Application Date: 2018-01-03
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Publication No.: US11572462B2Publication Date: 2023-02-07
- Inventor: Sasha P. Schmitt , George J. Pehlert
- Applicant: ExxonMobil Chemical Patents Inc.
- Applicant Address: US TX Baytown
- Assignee: ExxonMobil Chemical Patents Inc.
- Current Assignee: ExxonMobil Chemical Patents Inc.
- Current Assignee Address: US TX Baytown
- Agency: Vorys, Safer, Seymour and Pease LLP
- Priority: EP17160477 20170313
- International Application: PCT/US2018/012140 WO 20180103
- International Announcement: WO2018/147944 WO 20180816
- Main IPC: C08L23/12
- IPC: C08L23/12 ; C08J9/02

Abstract:
A polypropylene composition suitable for foaming having improved processability but maintained strain hardening and the process to produce the polypropylene composition comprising combining a linear polypropylene having a melt strength within a range from 10 to 40 cN (190° C.) with an organic peroxide to obtain a branched polypropylene having a melt strength within a range from 20 to 80 cN (190° C.), wherein the melt strength of the branched polypropylene is greater than the melt strength of the linear polypropylene; and combining the branched polypropylene having a melt flow rate within a range of 0.1 to 20 g/10 min and an Mw/Mn of at least 5 with within a range from 5 to 40 wt % of a low molecular weight polyolefin having a melt flow rate of at least 50 g/10 min and an Mw/Mn of less than 5 to obtain the polypropylene composition.
Public/Granted literature
- US20200255641A1 High Melt Strength Polypropylenes with Improved Processability Public/Granted day:2020-08-13
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