Invention Grant
- Patent Title: Multimodal polyethylene pipe resins and process
- Patent Title (中): 多峰聚乙烯管材树脂及工艺
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Application No.: US12287449Application Date: 2008-10-09
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Publication No.: US09249286B2Publication Date: 2016-02-02
- Inventor: Sebastian Joseph
- Applicant: Sebastian Joseph
- Applicant Address: US TX Houston
- Assignee: Equistar Chemicals, LP
- Current Assignee: Equistar Chemicals, LP
- Current Assignee Address: US TX Houston
- Main IPC: B32B1/08
- IPC: B32B1/08 ; C08L23/06 ; C08L23/08 ; B32B1/02
Abstract:
Multimodal polyethylene resins having improved stress crack resistance and melt strength rendering them useful for the manufacture of thick-walled pipe are produced in a process wherein the second stage of the process is a copolymerization conducted at a high temperature with a low comonomer to ethylene ratio and a low hydrogen to ethylene ratio.
Public/Granted literature
- US20100092709A1 Multimodal polyethylene pipe resins and process Public/Granted day:2010-04-15
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