Solid catalyst component for olefin polymerization, method for producing the same, olefin polymerization catalyst, and method for producing olefin polymer
US-10457755-B2 · Oct 29, 2019 · US
Ethylene copolymers with a novel composition distribution and processes for making the same
US8993693B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8993693-B2 |
| Application number | US-201213429013-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 23, 2012 |
| Priority date | Mar 23, 2012 |
| Publication date | Mar 31, 2015 |
| Grant date | Mar 31, 2015 |
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Abstract
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A Ziegler-Natta catalyzed ethylene copolymer having a novel composition distribution in which comonomers are incorporated into the high molecular weight polymer molecules and distributed evenly among the entire polyethylene chains, and a method for making the same are provided. The resins having a novel composition distribution have controlled molecular weight distribution which is narrower than conventional ZN-ethylene copolymers but broader than single-site catalyzed ethylene copolymers. The resins having a novel composition distribution exhibit a superior tear strength and impact strength.
First claim
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What is claimed is: 1. A Ziegler-Natta catalyzed ethylene alpha-olefin copolymer, further comprising: a density of between 0.900 g/cc and 0.930 g/cc; a melt index ratio (I 21 /I 2 ) of between 20 and 35 dg/min; a melt index (I 2 ) of between 0.1 and 10 dg/min; and a polydispersity index (Mw/Mn) of between 3.0 and 5.0; wherein the Temperature Raising Elution Fractionation (TREF) fraction distribution of the copolymer has at least 15 wt % of TREF fractions below an elution t…
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- C08F4/6055Primary
Chemistry & Metallurgy · mapped topic
- C08F210/16Primary
Chemistry & Metallurgy · mapped topic
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- What does patent US8993693B2 cover?
- A Ziegler-Natta catalyzed ethylene copolymer having a novel composition distribution in which comonomers are incorporated into the high molecular weight polymer molecules and distributed evenly among the entire polyethylene chains, and a method for making the same are provided. The resins having a novel composition distribution have controlled molecular weight distribution which is narrower tha…
- Who is the assignee on this patent?
- Lu Honglan, Xu Guangxue, Formosa Plastics Corp
- What technology area does this patent fall under?
- Primary CPC classification C08F4/6055. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Mar 31 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).