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US 4,378,456 AGranted
Terpolymers of ethylene, butadiene and isoprene and a process for their preparation
AssigneeBayer Aktiengesellschaft
InventorsWolfgang Wieder, Josef Witte
Life of this patent
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Abstract
Ethylene-butadiene-isoprene terpolymers consisting of more than 80 mol % of alternating ethylene-diene units and in which more than 95 mol % of the diene units built into the polymer are in the 1,4-configuration.
Claims8
A process for preparing a terpolymer of ethylene, butadiene and isoprene which comprises polymerizing said monomers in solution at a temperature of from -80.degree. to 100.degree. C. in the presence of a catalytic amount of a catalyst consisting of
- (a) a vanadium compound of the formula VO(OR).sub.2 X and
- (b) an organic aluminum compound of the formula AlR'.sub.3, HAlR'.sub.2 or R'.sub.2 AlY,
- wherein
- R is alkyl having 1-20 C-atoms,
- X is a halogen group,
- R' is alkyl having 1-8 C-atoms, and
- Y is halogen,
- the molar ratio of (b) to (a) being from 100:1 to 1:10.
5 more elements
Dependencies are inferred from the claim text.