METHOD FOR OBTAINING A MODIFIED POLYMER BASED ON ASSOCIATED DIENE, MODIFIED POLYMER BASED ON CONNECTED DIENE, COMPOSITION OF A MODIFIED POLYMER BASED ON COUPLED DIENE CONCENTRATED POLYMER ON A BASIS OF COUPLED DIENE ARE DIFFERENTIATED DIAMOND.

摘要

A method for producing a conjugated diene-based modified polymer, which comprises a polymerization step for preparing a conjugated diene-based modified polymer having an active end, by polymerization using a polymerization initiator comprising a compound that has at least one nitrogen atom in the molecule and an organolithium compound ; and a modification step, which is the interaction of a modifier represented by the following chemical formula with the active end of a conjugated diene polymer: where each radical with Rpo R independently represents an alkyl group containing from 1 to 20 carbon atoms, or an aryl group containing from 6 to 20 carbon atoms; R represents an alkylene group containing from 3 to 10 carbon atoms; R represents an alkylene group containing from 1 to 20 carbon atoms; m is a positive integer equal to 1 or 2; and n is a positive integer equal to 2 or 3.