Polyolefin film with improved toughness
US10913831B2 · kind B2 · utility
2Cited by
3References
20Claims
0Family size
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Key dates
| Filing date | Jan 23, 2017 |
| Grant date | Feb 9, 2021 |
| Priority date | — |
| Expiry date | May 21, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2203/16
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A film formed from a polyethylene copolymer using a reduced chromium oxide catalyst, ethylene monomers and a co-monomer selected from butene monomers or 1-hexene, where the polyethylene copolymer has a density in the range of from about 0.935 to about 0.950 g/cm3 and an I21/I5 in a range of about 18.0 to about 30.0. The film formed from the polyethylene copolymer has a dart drop impact (g/μm) that significantly greater as compared to a film of the polyethylene copolymer formed using a silyl chromate catalyst in place of the reduced chromium oxide catalyst. A method of making such films is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.