Process for the preparation of a particulate bimodal polyethylene product
US8445607B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 17, 2010 |
| Grant date | May 21, 2013 |
| Priority date | — |
| Expiry date | Dec 17, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F110/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention relates to a process for the preparation of a particulate bimodal polyethylene product having a median particle diameter of less than 300 μm in a serially connected double loop reactor, wherein said polymerization catalyst applied in the polymerization process comprises a particulate metallocene-alumoxane catalyst immobilized on a porous silica support, wherein said polymerization catalyst has a median particle diameter of less than 50 μm; and whereby the ratio of the median particle diameter of the obtained bimodal polyethylene product to the median particle diameter of the applied polymerization catalyst is less than 30.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.