C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
400/6449
C08F 36/04 (2006.01)
Patent
CA 1142291
ABSTRACT OF THE DISCLOSURE: A process of preparing a bimodal or multimodal homopolymer of a conjugated diene or a bimodal or multi- modal copolymer of a conjugated diene with another conjugated diene or with a vinyl aromatic compound consists in polymer- izing the monomer(s) in a reaction medium at a temperature of between 20°C. and 200°C. in the presence of a catalyst system formed of the reaction product of: (a) an organic compound of a metal of group 3A of the periodic classification of elements of the Mendeleev Table having one of the following formulas: M1M3R1R2R3R4 M2(M3R1R2R3R4)2 M3R1R2R3 M1OM3R1R2 with (b) at least one electron-donor compound containing at least one heteroatom, and adding hydrogen as a modifying agent to the reaction medium during the course of the polymerization reaction.
375137
Michelin & Cie (compagnie Generale Des Etablissements Michelin)
Robic Robic & Associes/associates
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