Organolithium polymerization initiators and their preparations

Details Organolithium polymerization initiators and their preparations Organolithium polymerization initiators and their preparations

1975-05-15

1978-02-21

Sneed, Helen M. S.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

252431L, C07F 102

Patent

active

040752534

ABSTRACT:
A stable and non-polar solvent soluble alpha-methylstyrene-conjugated diene oligomer dilithium as a polymerization initiator is obtained by preparing a dilithium initiator solution by reacting lithium metal with alpha-methylstyrene in a polar solvent at low temperature, thereafter adding gradually a small amount of a conjugated diene to the dilithium initiator solution to consume completely the alpha-methylstyrene, and then adding additional conjugated diene in a certain amount so as to prepare the stable and non-polar solvent soluble alpha-methylstyrene-conjugated diene oligomer dilithium.

REFERENCES:
patent: 3091606 (1963-05-01), Hsieh
patent: 3308170 (1967-03-01), Pritchett et al.
patent: 3388178 (1968-06-01), Kamienski et al.
patent: 3560593 (1971-02-01), Hsieh
patent: 3663634 (1972-05-01), Morton
patent: 3776964 (1973-12-01), Morrison et al.
patent: 3848008 (1974-11-01), Fetters

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