METHOD OF PRODUCING POLYBUTADIENE RUBBER AND RUBBER COMPOSITION Russian patent published in 2010 - IPC C08L9/00 C08L53/00 

FIELD: chemistry.

SUBSTANCE: method involves mixing (A) vinyl-cis-polybutadiene and (B) cis-polybutadiene. (A) vinyl-cis-polybutadiene is produced by carrying out stage (1) for adding cis-1,4-polymerisation catalyst, obtained from an organoaluminium compound and a dissolved cobalt compound, to a mixture containing 1,3-butadiene and hydrocarbon organic solvent as main components. Water content is regulated in the interval from 0.1 to 1.0 mol/mol of organoaluminium compound. Cis-1,4-polymerisation of 1,3-butadiene is carried out, and then (2) in the presence of a catalyst obtained from the dissolved cobalt compound, organoaluminium compound, described by general formula A1R₃ (where R is an alkyl group containing 1 to 6 carbon atoms, a phenyl group or a cycloalkyl group), and carbon sulphide, in the mixture obtained from polymerisation, 1,3-butadiene is subjected to 1,2-polymerisation. (B) cis-polybutadiene is obtained by adding the above described cis-1,4-polymerisation catalyst. Cis-1,4-polymerisation of 1,3-butadiene is carried out.

EFFECT: rubber composition, which contains the obtained rubber, is meant for making tyre components, particularly the sides, coating of tyre cords, tread base, and large vehicle tyres.

13 cl, 47 ex, 16 tbl