FIELD: chemical or physical processes.
SUBSTANCE: present invention relates to a butadiene-isoprene diblock copolymer, as well as a method for production thereof. Butadiene-isoprene diblock copolymer is formed by a solid block of crystalline polybutadiene and a soft block of amorphous polyisoprene. Method of producing butadiene-isoprene diblock copolymer includes (i) carrying out living polymerisation of 1,3-butadiene in the presence of a catalyst system comprising at least one iron complex having general formula (I) or (II) (presented in cl. 6 of the patent claim), and at least one cocatalyst, which is methylaluminoxane, and continuing said living polymerisation substantially to complete conversion of 1,3-butadiene; (ii) adding isoprene to the polymerisation mixture obtained at step (i), and continuing said living polymerisation substantially until complete conversion of isoprene. Said butadiene-isoprene diblock copolymer can be used both in the shoe industry and in the production of tires for cars and/or trucks.
EFFECT: disclosed are butadiene-isoprene diblock copolymers and a method for production thereof.
7 cl, 28 dwg, 1 tbl, 20 ex
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