Process for making polyolefin compositions containing exfoliated clay
US6646072B2 · kind B2 · utility
8Cited by
11References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 23, 2002 |
| Grant date | Nov 11, 2003 |
| Priority date | — |
| Expiry date | Jan 23, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F4/642
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A clay-filled polyolefin composition and process for making it are disclosed. The process involves treatment of a non-acid-treated smectite clay with a Ziegler-Natta catalyst in the presence of a hydrocarbon and subsequent polymerization of an olefin in the presence of the treated clay and an organoaluminum cocatalyst. Results indicate that filled compositions produced by this process contain exfoliated clay.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.