Invention Grant
- Patent Title: Propylene copolymer compositions and processes to produce them
- Patent Title (中): 丙烯共聚物组合物及其制备方法
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Application No.: US14051571Application Date: 2013-10-11
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Publication No.: US09321914B2Publication Date: 2016-04-26
- Inventor: Matthew W. Holtcamp , Prasadarao Meka , Celestino M. Perez, Jr. , Gregory S. Day
- 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
- Agent Kevin M. Faulkner; Renuka Ganesh
- Main IPC: C08L23/00
- IPC: C08L23/00 ; C08L23/14 ; C08F210/06 ; C08F4/659 ; C08F4/6592

Abstract:
This invention relates to a process for producing propylene-based in-reactor compositions comprising: (a) contacting propylene and from about 0 wt % to 10 wt % C2 and/or C4 to C20 alpha olefins under polymerization conditions in a first stage to form Component A; (b) contacting Component A, ethylene and from about 3 wt % to 30 wt % of one or more C3 to C20 alpha olefin, in the presence of a metallocene catalyst system, under polymerization conditions in a second stage to form Component B; wherein the metallocene catalyst system comprises: (i) a metallocene compound comprising a group 4, 5, or 6 metal, (ii) an activator, and (iii) a support material; and (c) obtaining a propylene-based in-reactor composition comprising Component A and Component B, wherein the propylene-based in-reactor composition has a multimodal melting point. Propylene-based in-reactor compositions and articles comprising these propylene compositions are also disclosed.
Public/Granted literature
- US20140121325A1 Propylene Copolymer Compositions and Processes to Produce Them Public/Granted day:2014-05-01
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