Ziegler-Natta catalysts modified with metallocenes
US5767031A · kind A · utility
23Cited by
20References
49Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 7, 1995 |
| Grant date | Jun 16, 1998 |
| Priority date | — |
| Expiry date | Jun 7, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/943
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
This invention relates to a process for making a catalyst in which a metallocene is included in the synthesis of a Ziegler-Natta catalyst and a process for using the catalyst in the polymerization of olefins, specifically, propylene, to produce a polymer product with broad polydisperisty. The catalyst may be synthesized by: PA1 1) selecting a solid component comprising a magnesium dialkoxide; PA1 2) adding a chlorinating agent; PA1 3) adding a titanating agent; PA1 4) adding a metallocene prior to step 2), after step 2), prior to step 3) or after step 3) and PA1 5) adding an aluminum alkyl cocatalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.