Polymerization process and control of polymer composition properties
US6828395B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 15, 2003 |
| Grant date | Dec 7, 2004 |
| Priority date | — |
| Expiry date | Oct 15, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F4/65916
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Methods of controlling rheological properties of polymer compositions comprising at least one high molecular weight polymer and one low molecular weight polymer are disclosed. The polymer compositions are produced by polymerizing monomers in a single reactor using a bimetallic catalyst composition. A control agent such as, for example, an alcohol, ether, oxygen or amine is added to the reactor to control the rheological properties of the reactor. The polymerization takes place in the presence of rheological-altering compounds such as alkanes and aluminum alkyls. The control agents are added in an amount sufficient to counter the influences of the rheological-altering compounds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.