- Patent Title: Process for manufacture of low emission heterophasic polypropylene
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Application No.: US16468091Application Date: 2017-12-12
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Publication No.: US10995158B2Publication Date: 2021-05-04
- Inventor: Benoit Therese Philippe Lecouvet , Christelle Marie Helene Grein
- Applicant: SABIC GLOBAL TECHNOLOGIES B.V.
- Applicant Address: NL Bergen op Zoom
- Assignee: SABIC GLOBAL TECHNOLOGIES B.V.
- Current Assignee: SABIC GLOBAL TECHNOLOGIES B.V.
- Current Assignee Address: NL Bergen op Zoom
- Agency: Cantor Colburn LLP
- Priority: EP16203443 20161212
- International Application: PCT/EP2017/082464 WO 20171212
- International Announcement: WO2018/108935 WO 20180621
- Main IPC: C08F2/34
- IPC: C08F2/34 ; C08F2/01 ; C08F210/06 ; C08F210/16 ; C08L23/12 ; C08F2/00 ; C08F4/654 ; C08F4/656 ; C08L23/08 ; C08L23/14

Abstract:
The invention relates to a process for the preparation of a heterophasic propylene copolymer consisting of a propylene-based matrix and a dispersed ethylene-a-olefin copolymer, comprising the steps of a) preparing the propylene-based matrix from propylene and optionally a C2 or C4-C12 α-olefin by contacting at least propylene and optionally C2 or C4-C12 a-olefin with a catalyst in a first gas-phase reactor at a temperature T1 and a pressure P1, b) subsequently preparing the dispersed ethylene-α-olefin copolymer from ethylene and a C3-C12 α-olefin by contacting the ethylene and the C3-C12 α-olefin with a catalyst in a second gas-phase reactor at a temperature T2 and a pressure P2, wherein T1-T2 is in the range from 6 to 25° C., wherein T1>T2, wherein PI and P2 are in the range from 22 to 30 bar to prepare a heterophasic propylene copolymer (A′).
Public/Granted literature
- US20190330386A1 PROCESS FOR MANUFACTURE OF LOW EMISSION HETEROPHASIC POLYPROPYLENE Public/Granted day:2019-10-31
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