Dual- or multi-headed chain shuttling agents and their use for preparation of block copolymers
US8501885B2 · kind B2 · utility
15Cited by
6References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 20, 2010 |
| Grant date | Aug 6, 2013 |
| Priority date | — |
| Expiry date | Jul 20, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2420/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
This disclosure relates to olefin polymerization catalysts and compositions, their manufacture, and the production of polyolefins using specific catalyst compositions, including the use of chain shuttling agents in the olefin polymerization process. Specifically, this disclosure provides for dual headed and multi-headed chain shuttling agents (CSAs or MSAs) and for their use in preparing blocky copolymers. By controlling the ratio of dual-headed and multi-headed CSA sites to mono-headed CSA sites, a blocky copolymer can be provided having properties such as a narrow molecular weight distribution and/or improved melt properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.