Propylene-based polymer with reduced high-molecular weight portion
US9908952B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 14, 2014 |
| Grant date | Mar 6, 2018 |
| Priority date | — |
| Expiry date | Nov 14, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2810/10
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present disclosure provides a process for producing propylene-based polymer. The process includes contacting, under polymerization conditions in a gas phase polymerization reactor, propylene monomer and optionally one or more comonomers with a Ziegler-Natta catalyst composition. The process includes maintaining the temperature of a reaction zone of the reactor at a temperature from greater than 72° C. to less than or equal to 85° C., and forming a propylene-based polymer having a molecular weight (Mw) greater than 100,000, and a Mz+1/Mz less than 2.20. The resultant propylene-based polymer is advantageous in fiber applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.