Catalyst system containing an anionic initiator based on lithium and phosphine oxide modifier
US4476240A · kind A · utility
57Cited by
2References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 1, 1982 |
| Grant date | Oct 9, 1984 |
| Priority date | — |
| Expiry date | Jul 1, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F36/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process and catalyst system is disclosed herein for the preparation of (co)polymers having a 1,2-microstructure of between about 20 and about 65 percent. These (co)polymers are prepared in a hydrocarbon or non-polar solvent from a monomer system which contains at least one 1,3-diene monomer. The catalyst system which is employed in the production of the (co)polymer is a combination of an anionic initiator based on lithium and a phosphine oxide modifier which is substituted with three saturated heterocyclic rings, each hetero ring containing one nitrogen atom and either four, five or six carbon atoms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.