Catalyst composition for polymerization of conjugated diene and process for producing conjugated diene polymer
US4933401A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 23, 1989 |
| Grant date | Jun 12, 1990 |
| Priority date | — |
| Expiry date | Feb 23, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F36/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A catalyst composition for polymerizing a conjugated diene which comprises the following (a), (b) and (c) components: PA0 (a) an organolithium-aluminum compound represented by the formula: EQU LiAlR.sup.1 R.sup.2 R.sup.3 R.sup.4 PA0 (b) an organobarium-aluminum compound represented by the formula: EQU Ba(AlR.sup.1 R.sup.2 R.sup.3 R.sup.4).sub.2 or Ba[AlR.sup.1 R.sup.2 R.sup.3 (OR.sup.4)].sub.2 PA0 (c) a lithium alkoxide represented by the formula: EQU LiOR.sup.5 PA0 The conjugated diene polymer or copolymer obtained by polymerizing a conjugated diene alone or in combination with other monomer with the above catalyst composition in an inert organic solvent has a high trans-1,4 bond content, a low vinyl bond content and a low cis-1,4 bond content.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.