Catalyst
US-2015344595-A1 · Dec 3, 2015 · US
Advanced transition metal catalytic systems in terms of comonomer incorporations and methods for preparing ethylene homopolymers or copolymers of ethylene and alpha-olefins using the same
US8993694B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8993694-B2 |
| Application number | US-201313870191-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 25, 2013 |
| Priority date | Jun 24, 2011 |
| Publication date | Mar 31, 2015 |
| Grant date | Mar 31, 2015 |
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Abstract
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Provided is a homogeneous catalytic system for use in preparing an ethylene homopolymer or a copolymer of ethylene and α-olefin, and more particularly a Group 4 transition metal compound in which a cyclopentadienyl derivative 3,4-positions of which are substituted with alkyls and an electron-donating substituent are crosslinked around a Group 4 transition metal. Also provided is a method of preparing an ethylene homopolymer or a copolymer of ethylene and α-olefin, having high molecular weight, under high-temperature solution polymerization conditions using the catalytic system including such a transition metal compound and a co-catalyst composed of an aluminum compound, a boron compound or a mixture thereof. The catalyst according to present invention has high thermal stability and enables the incorporation of α-olefin, and is thus effective in preparing an ethylene homopolymer or a copolymer of ethylene and α-olefin, having various properties, in industrial polymerization processes.
First claim
Opening claim text (preview).
What is claimed are: 1. A method of preparing an ethylene homopolymer or a copolymer of ethylene and α-olefin having a weight average molecular weight of 80,000 to 500,000 and a molecular weight distribution (Mw/Mn) of 1.5 to 4.1 using a transition metal catalyst composition represented by Chemical Formula 1 below, wherein a density of the copolymer of ethylene and α-olefin is 0.850 to 0.940 g/cc:…
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Classifications
- C07F17/00Primary
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
- C08F4/6592Primary
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
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- What does patent US8993694B2 cover?
- Provided is a homogeneous catalytic system for use in preparing an ethylene homopolymer or a copolymer of ethylene and α-olefin, and more particularly a Group 4 transition metal compound in which a cyclopentadienyl derivative 3,4-positions of which are substituted with alkyls and an electron-donating substituent are crosslinked around a Group 4 transition metal. Also provided is a method of pre…
- Who is the assignee on this patent?
- Sk Innovation Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification C07F17/00. 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).