Polymerization catalyst system containing organolithium, dialkyl

Details Polymerization catalyst system containing organolithium, dialkyl Polymerization catalyst system containing organolithium, dialkyl

1982-07-01

1984-09-25

Henderson, Christopher A.

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Organic compound containing

502155, 526177, 526179, C08F 452, C08F 448

Patent

active

044736614

ABSTRACT:
A process and catalyst system is disclosed herein for the preparation of (co)polymers having a 1,2-microstructure ranging 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 and optionally other copolymerizable monomers. The catalyst system which is employed in the production of the (co)polymer is a combination of (1) an anionic initiator based on lithium; (2) a dialkyl magnesium compound or a trialkyl aluminum compound or a mixture thereof; and (3) 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.

REFERENCES:
patent: 3699055 (1972-10-01), Trepka
patent: 4250283 (1981-02-01), Caunt

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