Polymer of ethylene
US7452954B2 · kind B2 · utility
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4References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 5, 2004 |
| Grant date | Nov 18, 2008 |
| Priority date | — |
| Expiry date | Nov 8, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F210/16
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention relates to a polymer of ethylene which has a μo/μ2 ratio of at least 13; and a high load melt index HLMI lower than 8 g /10 min, and a value of tan δ at ω/ωc=0.01 of less than 1.3, where δ is G″/G′, ω is the frequency at which G″ and G′ are measured and we is the frequency at which G″=G′, and G and G″ are respectively the elastic modulus and viscous modulus, both measured in Pa at 190° C.; a process for making the polymer using a catalyst comprising chromium supported on a silica-titania support is also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.