Catalytic system, its method for preparation, and method for preparation of a copolymer of ethylene and a conjugated diene
US6569799B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 12, 2000 |
| Grant date | May 27, 2003 |
| Priority date | — |
| Expiry date | Oct 12, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/943
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention provides to a catalytic system, its method for preparation, and a method for preparation of a copolymer of ethylene and a conjugated diene, which uses this catalytic system. A catalytic system according to the invention comprises:an organometallic complex compound, which is represented by one formula A or B:  in which Ln represents a metal of a lanthanide, the atomic number of which is between 57 and 71;X represents a halogen, which can be chlorine, fluorine, bromine or iodine; andCp1 and Cp2 each comprise a cyclopentadienyl or fluorenyl group, which is or is not substituted, andP is a bridge corresponding to the formula MR2, in which M is an element of column IVA of Mendeleev's periodic classification, and R is an alkyl group comprising from 1 to 20 atoms of carbon; anda co-catalyst selected from among a magnesium alkyl, a lithium alkyl, an aluminium alkyl, or a Grignard's reagent, and mixtures thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.