Molecular weight distribution modification in tubular reactor
US4789714A · kind A · utility
67Cited by
26References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 26, 1985 |
| Grant date | Dec 6, 1988 |
| Priority date | — |
| Expiry date | Dec 26, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/922
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method for preparing a polymodal MWD ethylene-alpha olefin copolymer using at least two catalysts to initiate growth of polymer chains that attain different average molecular weights. The polymodal MWD ethylene copolymer comprises at least two different molecular weight modes each mode having a narrow MWD and at least one of two characteristics (1) an Mw/Mn of less than 2 and (2) Mz/Mw of less than 1.8.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.