Method for producing polypropylene
US11725069B2 · kind B2 · utility
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3References
13Claims
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Key dates
| Filing date | Oct 13, 2021 |
| Grant date | Aug 15, 2023 |
| Priority date | — |
| Expiry date | Oct 21, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F110/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Provided is a method of producing polypropylene. More specifically, provided is a method of efficiently producing high-strength isotactic polypropylene having high crystallinity even with a shorter polymerization time. More specifically, provided is a method of producing polypropylene, including polymerizing propylene in the presence of a catalyst composition including a Ziegler-Natta catalyst, an external electron donor, dialkylaluminum hydride, and trialkylaluminum. The polypropylene has a xylene cold soluble content of 3 wt % or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.