Dendrimers of rubbery polymers

摘要

This invention discloses a process for synthesizing a dendrimer of a rubbery polymer comprising: (a) reacting a lithium terminated rubbery polymer with a halogenated silicon or tin containing compound to produce a polymer which is terminated with halogenated silicon moieties, wherein the halogenated silicon contain compound has at least three halogen atoms which are bonded directly to silicon or tin atoms, wherein the ratio of the lithium terminated rubbery polymer to halogen atoms in the halogenated silicon or tin containing compound is within the range of 2:n to (n-1):n, wherein n represents the number of halogen atoms that are bonded directly to silicon or tin atoms in the halogenated silicon or tin containing compound; (b) reacting the polymer which is terminated with halogenated moieties with a molar excess of a tertiary alcohol to produce a polymer which is terminated with hydroxy silyl moieties or hydroxyl tin moieties; and (c) allowing the polymer which is terminated with the hydroxy silyl moieties to couple.