Methods for producing borylated arenes
US-2015361109-A1 · Dec 17, 2015 · US
Enhanced catalyst performance for production of vinyl terminated propylene and ethylene/propylene macromers
US8993702B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8993702-B2 |
| Application number | US-201213655674-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 19, 2012 |
| Priority date | Mar 25, 2011 |
| Publication date | Mar 31, 2015 |
| Grant date | Mar 31, 2015 |
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Abstract
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This invention relates to a transition metal catalyst compound represented by the structure: wherein M is hafnium or zirconium; each X is, independently, selected from the group consisting of hydrocarbyl radicals having from 1 to 20 carbon atoms, hydrides, amides, alkoxides, sulfides, phosphides, halogens, dienes, amines, phosphines, ethers, or a combination thereof; each R 1 and R 3 are, independently, a C 1 to C 8 alkyl group; and each R 2 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 , R 10 , R 11 , R 12 , R 13 , and R 14 are, independently, hydrogen, or a substituted or unsubstituted hydrocarbyl group having from 1 to 8 carbon atoms, provided however that at least three of the R 10 -R 14 groups are not hydrogen, compositions thereof and methods of use thereof to prepare polymers.
First claim
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What is claimed is: 1. A propylene-ethylene copolymer having an Mn of more than 30,000 g/mol and up to 60,000 g/mol, and at least 90% allyl chain ends relative to total unsaturation; and wherein the polymer is produced with a single metallocene catalyst at a temperature within the range of 25 to 150° C. and a pressure within the range of 0.45 to 6 MPa. 2. The copolymer of claim 1 , where the polymer has an isobutyl chain end to allylic vinyl group ratio of 0.8:…
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Operations & Transport · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Operations & Transport · mapped topic
- B01J31/2295Primary
Operations & Transport · mapped topic
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- What does patent US8993702B2 cover?
- This invention relates to a transition metal catalyst compound represented by the structure: wherein M is hafnium or zirconium; each X is, independently, selected from the group consisting of hydrocarbyl radicals having from 1 to 20 carbon atoms, hydrides, amides, alkoxides, sulfides, phosphides, halogens, dienes, amines, phosphines, ethers, or a combinati…
- Who is the assignee on this patent?
- Exxonmobil Chem Patents Inc
- What technology area does this patent fall under?
- Primary CPC classification B01J31/2295. Mapped technology areas include Operations & Transport.
- 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).