Process for the synthesis of a high vinyl isoprene-butadiene copolymer

摘要: Isoprene-butadiene copolymers having high vinyl contents can be synthesized in organic solvents to yields after short polymerization times by utilizing the process of this invention. The isoprene-butadiene made invention have a glass transition temperature which is within range about 0° C. -60° and employed tire treads provide improved traction cut growth resistance. This specifically discloses for synthesis content comprises copolymerizing isoprene monomer butadiene an solvent at -10° 100° presence catalyst system comprised (a) organoiron compound, (b) organoaluminum (c) chelating aromatic amine, (d) protonic compound; wherein molar ratio amine compound 0.1:1 1:1, 5:1 200:1, 0.001:1 0.2:1.