Preparation of star polymers

Details Preparation of star polymers Preparation of star polymers

C - Chemistry, Metallurgy

07

F

400/2042, 400/30

C07F 1/02 (2006.01) C08F 236/10 (2006.01) C08F 297/04 (2006.01) C08L 21/00 (2006.01) C08L 67/06 (2006.01)

Patent

CA 1178602

Abstract Of The Disclosure Divinyl benzene and/or diisopropenyl benzene in hydrocarbon solvent is added over a period of time at low temperature to hydrocarbon solvent containing a C2-20 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 ?n 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.

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