Tri-n-octyl aluminum co-catalyst for higher density homopolymers for the solution process
US11021551B2 · kind B2 · utility
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19Claims
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Key dates
| Filing date | Aug 2, 2018 |
| Grant date | Jun 1, 2021 |
| Priority date | — |
| Expiry date | Aug 2, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F10/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Catalyst systems and solution olefin polymerization processes using a combination of titanium compounds (e.g. halides) with vanadium compounds (e.g. halides or oxyhalides) with tri-n-octyl aluminum (TNOAL) as a co-catalyst, which provides lower in situ oligomerization of olefins that are incorporated into the homopolymer. This feature provides a higher density homopolymer using TNOAL, which enhances polymer properties such as increased moisture barrier and stiffness. Multi-reactor systems and solution olefin polymerization processes comprising this catalyst system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.