Metallocene-produced very low density polyethylenes or linear low density polyethylenes as impact modifiers
US7220801B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 11, 2002 |
| Grant date | May 22, 2007 |
| Priority date | — |
| Expiry date | Nov 9, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2314/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
In one embodiment, the present invention is directed to an article, such as a blow-molded bottle, formed from a polymer blend composition. In one aspect, the article is formed by blow-molding techniques. In one aspect, the article is a blow-molded container having a Bruceton Mean Drop Height of 3.8 feet or above. In another aspect, the article is a blow-molded container having a volume of 60 fluid ounces or greater. In general, the polymer blend composition comprises polypropylene and an impact modifier of metallocene-produced very low density polyethylene or linear low density polyethylene. In one embodiment, the polypropylene polymer comprises a random copolymer. In one embodiment the metallocene-catalyzed linear very low density polyethylene polymer has one or more of the following: (a) a density of less than 0.916 g/cm3, (b) a composition distribution breadth index of 50 to 85% by weight, (c) a molecular weight distribution Mw/Mn of 2.0 to 3.0, (d) a molecular weight distribution Mz/Mw of less than 2.0, and (e) two peaks in a TREF measurement. In one embodiment, the polymer blend composition comprises 5% to 85% of the impact modifier and 95% to 15% of the polypropylene polymer,…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.