C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
400/6449
C08F 36/04 (2006.01) C08F 4/60 (2006.01) C08F 212/08 (2006.01)
Patent
CA 1142289
ABSTRACT OF THE DISCLOSURE A process of preparing a bimodal or multimodal homo- polymer of a conjugated diene or a bimodal or multimodal copo- lymer of a conjugated diene with another conjugated diene or with a vinyl aromatic compound consists in polymerizing the monomer(s) in a reaction medium at a temperature of between 20°C. and 200°C. in the presence of a catalyst system comprising an organolithium initiator, a barium, strontium or calcium compound, and an organometallic compound of a metal of group 2B or 3A of the periodic classification of elements of the Mendeleev Table, and adding to the reaction medium during the course of the polymerization reaction a compound of a transition metal of groups 1B to 7B and 8 or a magnesium compound of the general formula Mg(A)2.
375054
Michelin & Cie (compagnie Generale Des Etablissements Michelin)
Robic Robic & Associes/associates
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