Oxygen tailoring of polyethylene blow molding resins
US7285617B2 · kind B2 · utility
3Cited by
22References
36Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 8, 2004 |
| Grant date | Oct 23, 2007 |
| Priority date | — |
| Expiry date | Jun 2, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F8/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Processes are disclosed for oxygen-tailoring polyethylene blow molding resin. Polyethylene resin is conveyed through a feed zone, a melt-mixing zone and a melt zone, wherein the temperature of the polyethylene resin is from about 216° C. to about 260° C. in the melt zone. The resin is contacted with oxygen in an amount of at least about 20 parts by weight oxygen per million parts by weight resin. The oxygen-treated resin can be used to make polyethylene blow molded articles having improved melt strength, processability, and die swell.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.