Process for preparing isobutylene-based polymers
US7238819B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 21, 2003 |
| Grant date | Jul 3, 2007 |
| Priority date | — |
| Expiry date | Mar 17, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F210/12
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
This invention relates to a metal organic compound, a catalytic composition comprising said metal organic compound, a process for homo- or co-polymerizing isoolefines in the presence of said metal organic compound and a method of stabilizing a compound of the general structure (II) [R′HC(CRR″)2]2+[M2X9]−, in which R is a group of the formula SiR1R2R3, R″ is hydrogen, C1 to C12 alkyl, a C6 to C14 aryl or a C7 to C20 alkylaryl, M is Zr or Hf, X is a halogen atom, and R1 to R3 is a C1 to C12 alkyl group, with a compound R′ of the formula M′R4R5R6, in which M′ is Si, Ge, Sn or Pb and R4 to R6 is a C1 to C12 alkyl group as well as a non-coordinating anion of the general structure [M2X9]− in which M is Zr or Hf and X is a halogen atom.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.