Patent ID: 7687580

Claim:
A convergent method for anionically synthesizing a highly branched well-defined 1 st generation polydiene comprising the following steps: reacting a diene monomer (d) with sec-diene-Li to form a single double-tailed macromonomer of (Pdd 1 ) − Li + , coupling two of said single double-tailed macromonomers of (Pdd 1 ) − Li + together in a convergent manner by reacting with dichloro methyl silane diphenylethylene (DCMSDPE) coupling agent to form a double macromonomer of polydiene with a middle active center, reacting said double macromonomer of polydiene with said diene monomer and sec-diene-Li at said middle active center to form a 1 st generation-diene-lithium branch on branch structure, and combining three or more of said 1 st generation-diene-lithium branch on branch structures by reacting with trichloro silane coupling agent to form highly branched well-defined 1 st generation polydiene.