Method for controlled free radical polymerization or copolymerization of ethylene under high pressure in the presence of an initiator-controller
US6734269B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 15, 2001 |
| Grant date | May 11, 2004 |
| Priority date | — |
| Expiry date | Jun 15, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F110/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to a process for the radical polymerization or copolymerization of ethylene under high pressure in the presence of at least one polymerization initiating-controlling compound capable of providing, by decomposition under the polymerization or copolymerization conditions:at least one initiating free radical (Z) which carries at least one site for initiating the (co)polymerization; andat least one stable free radical (SFR) which carries at least one site exhibiting the stable radical state and which is stable under the polymerization conditions,with, in total, as many initiating sites as sites exhibiting the stable radical state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.