Preparation of lithium initiator for the preparation of star pol

Details Preparation of lithium initiator for the preparation of star pol Preparation of lithium initiator for the preparation of star pol

1982-09-22

1985-02-05

Sneed, Helen M. S.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

525 92, 525314, C07F 102

Patent

active

044977484

ABSTRACT:
Divinyl benzene and/or diisopropenyl benzene in hydrocarbon solvent is added over a period of time at low temperature to a hydrocarbon solvent containing a C.sub.2-20 normal, secondary or tertiary alkyl or cycloalkyl lithium compound and a tertiary alkylamine having 2-4 carbon atoms prepared at low temperature to provide an initiator having an average of from 4 to 9 C-Li sites and a VPO Mn of from about 750 to 4,000. These initiators are useful in polymerizing dienes and vinyl monomers to provide star polymers having an average of from about 4 to 9 arms or branches. These star polymers among other things are useful low profile or low shrink additives for FRPs, e.g., glass fiber reinforced plastics.

REFERENCES:
patent: 3632658 (1972-01-01), Halasa
patent: 3725368 (1973-04-01), Morrison et al.
patent: 3734973 (1973-05-01), Farrar
patent: 3862251 (1975-01-01), Strecker
patent: 3903168 (1975-09-01), Foss et al.
patent: 3954894 (1976-05-01), Kamienski et al.
patent: 4161494 (1979-07-01), Sigwalt et al.

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