FIELD: chemistry.
SUBSTANCE: invention relates to a modified conjugated diene polymer, as well as a rubber composition containing the said polymer. The modified conjugated diene polymer contains a repeating unit derived from a conjugated diene monomer, a unit derived from a macromonomer, and a functional group derived from an aminoalkoxysilane modifier. The aminoalkoxysilane modifier is one or more modifiers selected from the compounds represented by the formulas:
, and .
The degree of change in molecular weight distribution is 10% or less.
EFFECT: modified conjugated diene polymer has excellent storage stability and excellent processability, as well as tensile strength and viscoelastic properties.
9 cl, 3 tbl, 5 ex
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