Solid state properties of polyethylene prepared with tetrahydroindenyl-based catalyst system
US9255161B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 10, 2014 |
| Grant date | Feb 9, 2016 |
| Priority date | — |
| Expiry date | Jul 10, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1379
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Rotomolded articles and methods of forming the same are described herein. The rotomolded articles generally have a permeability of less than 1 g/day. The rotomolded articles generally include polyethylene obtained by injecting into a reactor a catalyst system including a metallocene catalyst component of specific formula and an activating agent; injecting into the reactor ethylene monomer at a concentration of at least 6.5 wt %; injecting an amount of hydrogen such that a ratio of hydrogen to ethylene (H2/C2) in the feed is less than 85 g/106 g; maintaining the reactor under polymerization conditions at a temperature of less than 90° C.; and retrieving polyethylene exhibiting a melt index (MI2) of at least 3.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.