Catalyst composition and polymerization process for producing syndiotactic 1,2-polybutadiene
US6117956A · kind A · utility
12Cited by
18References
23Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 1, 1998 |
| Grant date | Sep 12, 2000 |
| Priority date | — |
| Expiry date | Jun 1, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F136/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The instant invention teaches a method for forming a syndiotactic 1,2-polybutadiene product having a higher syndiotacticity and a higher melting temperature than syndiotactic 1,2-polybutadiene produced using chromium catalysts known in the prior art. The method includes polymerizing 1,3-butadiene in solution with a solvent, in the presence of catalytically effective amounts of: (a) a chromium compound; (b) an organomagnesium compound; and, (c) a cyclic hydrogen phosphite.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.