Enhanced crosslinking terpolymer
US6281316A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 22, 1999 |
| Grant date | Aug 28, 2001 |
| Priority date | — |
| Expiry date | Mar 22, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/916
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A polymer of the invention comprising the comonomers ethylene, one or more alpha-olefins having 3 to 20 carbon atoms, and one or more cyclic dienes having up to 30 carbon atoms, said polymer having a density of at least 0.890 gram per cubic centimeter; long chain branching; a plurality of double bonds; an Mw/Mn ratio ratio (PDI) of at least 2.5; a flow activation energy of greater than about 6.5 kcal/mol; and a Relaxation Spectrum Index (RSI), PDI, and Melt Index (MI), such that RSI.multidot.MI.sup.a >2.7 and RSI.multidot.MI.sup.a.multidot.PDI.sup.b is in the range of about 0.8 to about 60, when a and b are about 0.6 and minus 1.2, respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.