Dual catalyst system for producing LLDPE copolymers with a narrow molecular weight distribution and improved processability
US10442881B2 · kind B2 · utility
25Cited by
66References
21Claims
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Key dates
| Filing date | May 8, 2018 |
| Grant date | Oct 15, 2019 |
| Priority date | — |
| Expiry date | May 8, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2323/08
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed herein are ethylene-based polymers generally characterized by a Mw ranging from 70,000 to 200,000 g/mol, a ratio of Mz/Mw ranging from 1.8 to 20, an 1B parameter ranging from 0.92 to 1.05, and an ATREF profile characterized by one large peak. These polymers have the dart impact, tear strength, and optical properties of a metallocene-catalyzed LLDPE, but with improved processability, melt strength, and bubble stability, and can be used in blown film and other end-use applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.