Boron alkyl as co-catalyst to improve polymerization yield and control polydispersity
US5330947A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 15, 1991 |
| Grant date | Jul 19, 1994 |
| Priority date | — |
| Expiry date | Oct 15, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F10/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
This invention relates to a catalyst system using a boron alkyl in combination with an aluminum alkyl as a co-catalyst, a process for making the catalyst system and a process using the catalyst system for polymerization of olefins, especially .alpha.-olefins, such as propylene. While both boron alkyls and aluminum alkyls are known as co-catalysts separately, use of a boron alkyl with an aluminum alkyl as co-catalysts in olefin polymerization resulted in an unexpected increase in polymer yield. An increase in yield is accomplished without any increase in the amount of aluminum residue in the polymer product. The preferred boron alkyl is triethyl boron. The preferred aluminum alkyl is TEAl.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.