Addition of monomer in production of liquid polymers

Details Addition of monomer in production of liquid polymers Addition of monomer in production of liquid polymers

1980-03-21

1981-05-19

O'Keefe, Veronica

Chemistry of hydrocarbon compounds

Aromatic compound synthesis

By condensation of entire cyclic molecules or entire...

C07C 272

Patent

active

042687055

ABSTRACT:
Incremental addition of a monomer to be polymerized or copolymerized in a reaction medium comprising an alkyl aromatic, an organic lithium compound, and a transmetallation compound is effected to obtain liquid polymers and/or copolymers of narrow molecular weight range distribution suitable for conversion to lubricating oil as by hydrogenation. A conjugated diene, e.g., butadiene, alone, or together with a vinyl aromatic, e.g., styrene, is added incrementally to permit substantially complete reaction of at least the incrementally added monomer(s) and transmetallation to occur from living polymer to the alkyl aromatic in the reaction mass before addition of a succeeding increment.

REFERENCES:
patent: 3356754 (1967-12-01), Wofford
patent: 3751501 (1973-08-01), Kamienski et al.
patent: 4041088 (1977-08-01), Bach et al.
patent: 4049732 (1977-09-01), Bach et al.
patent: 4060492 (1977-11-01), Yasui et al.

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