Patent ID: 6310151
Filing Date: 2001-10-30
Classification: C08F

Abstract:
A process for the polymerisation of conjugated diolefins comprising polymerizing conjugated diolefins in the presence of,catalysts consisting of,(a) cobalt compounds,(b) organoaluminum compounds, and(c) modifiers comprising at least one Lewis base which contains as a donor atom at least one element selected from Groups Vb and VIb of the periodic system of the elements,as well as in the presence of vinyl aromatic compounds,wherein the polymerization is performed at temperatures of -30.degree. C. to +80.degree. C.; the molar ratio of components (a):(b):(c) is in the range from 1:10-1000:0.1-100; the quantity of component (a) of the catalyst used is 1 .mu.mol. to 10 mmol., relative to 100 g of the monomers used; and the quantity of vinyl aromatic compounds is 10 g to 2000 g, relative to 100 g of the monomers used.