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US 4,727,123 AGranted
Catalysts for the polymerization of conjugated dienes
AssigneeThe Standard Oil Company
InventorsRaymond J. Weinert, Jr., Kenneth C. Benton, Michael J. Desmond
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Abstract
Conjugated dienes are polymerized by a catalyst system comprised of a transition metal complex consisting of at least one binucleating ligand attached to at least one transition metal containing nucleus; and at least one organometallic cocatalyst containing at least one element of Group IA, IIA or Group IIIA.
Claims46
A process for the polymerization of conjugated dienes comprising contacting the dienes at a temperature and pressure sufficient to cause polymerization with a catalyst system comprising
- (a) at least one transition metal complex of at least one binucleating ligand, which attaches to at least one nucleus containing at least one transition metal element of Groups IB through VIIB and Group VIII of the Periodic Table of Elements, and
- (b) an organometallic compound containing at least one element of Group IA, Group IIA or Group IIIA of the Periodic Table of Elements.
Dependencies are inferred from the claim text.