LOW VISCOSITY TERMINALLY FUNCTIONALIZED ISOPRENE POLYMERS

摘要

Low viscosity poly(isoprene)polymers bearing one or two terminal hydroxyl groups having a molecular weight from 1000 to 20000, a polydispersity less than 2. The anionic polymerization of isoprene with monolithium initiators and functionalized initiators having the structure R<1>R<2>R<3>Si-O-A'-Li wherein R<1>, R<2> and R<3> are preferably alkyl, alcoxy, aryl, or alkaryl groups having from 1 to 10 carbon atoms, and A' is preferably a branched or straight chain bridging group having at least 2 carbon atoms produces unsaturated and hydrogenated isoprene polymers having high 1,4-addition of the isoprene, from about one to two terminal functional groups per molecule, and low viscosity.