Copolymers and films thereof
US7968659B2 · kind B2 · utility
21Cited by
4References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 27, 2006 |
| Grant date | Jun 28, 2011 |
| Priority date | — |
| Expiry date | Jan 25, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F210/16
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Copolymers of ethylene and an alpha-olefin having (a) a density in the range 0.900-0.940 g/cm3, (b) a molecular weight distribution (Mw/Mn) in the range 3.5 to 4.5, (c) a melt elastic modulus G′ (G″=500 Pa) in the range 40 to 150 Pa, (d) an activation energy of flow (Ea) in the range 28-45 kJ/mol, and (e) a melt index (g/10 ml) in the range 1.0-3.5. The copolymers are suitably prepared in the gas phase by use of a supported metallocene catalyst system. The copolymers show improved processability and are particular suitable for use in blown film applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.