The invention provides solid supported anionic catalysts, suitable for {TAIL ~ gas phase anionic polymerization} of {HEAD ~ conjugated diene monomers}, that are useful for anionically producing very high molecular weight branched diene polymers, such as styrene butadiene rubber, polybutadiene rubber, polyisoprene rubber, and the like 
The invention provides solid supported anionic catalysts , suitable for { TAIL ~ gas phase anionic polymerization } of { HEAD ~ conjugated diene monomers } , that are useful for anionically producing very high molecular weight branched diene polymers , such as styrene butadiene rubber , polybutadiene rubber , polyisoprene rubber , and the like
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