Modifying polyethylene made by Ziegler or single-site catalyst with free radical initiator
US7399809B1 · kind B1 · utility
2Cited by
14References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 11, 2007 |
| Grant date | Jul 15, 2008 |
| Priority date | — |
| Expiry date | Jan 11, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F8/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method of modifying a polyethylene is disclosed. In the method ethylene or a mixture of ethylene and a C3-C10 α-olefin is polymerized in an organic solvent with a Ziegler or single-site catalyst to form an initial polyethylene solution. The initial polyethylene solution is then reacted with a free radical initiator to produce a modified polyethylene. The modified polymer has an enhanced melt elasticity and increased long chain branching index, and is essentially free of gel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.