BUTADIENE RUBBER WITH DRAWFULLY INCREASED VISCOSITY BY MOONEY RECEIVED WITH USE OF INODIMIC CATALYST Russian patent published in 2017 - IPC C08C19/20 C08F36/06 C08F136/06 C08F236/06 C08F8/34 C08L15/00 

FIELD: chemistry.

SUBSTANCE: invention relates to a method for the stepwise increasing the Mooney viscosity in the preparation of high molecular weight polybutadiene having a content of 1,4-cis units >95 wt %, and a content of 1,2-vinyl groups <1 wt %, wherein 1) at least, one monomer, which is 1,3-butadiene, is polymerized at a temperature of 50 to 120°C in the presence of, at least, one inert organic solvent and, at least, one neodymium carboxylate catalyst, 2) the polymerization is terminated by the addition of protonic compounds selected from the group consisting of stearic acid and lauric acid, and (3) sulfur oxides are added to the polymerizer, which, before addition, is treated with a fatty acid ether of vegetable origin, which is epoxidized soybean oil. The invention also relates to a neodymium-catalyzed high molecular weight polybutadiene, which is produced by the above method. The high molecular weight polybutadiene catalyzed by neodymium has a coefficient of its modification of 1.3 to 2.5, preferably of 1.4 to 2.1. The modifying factor is the Mooney stress relaxation ratio measured after step 2), to the Mooney stress relaxation measured after step 3), and wherein the stress relaxation is measured according to ASTM D 1466-00. In addition, the invention relates to rubber blends containing the said polybutadiene, fillers, crosslinking agents, as well as additional auxiliary components of rubber compounds selected from the group consisting of vulcanization accelerators, antioxidants, heat stabilizers, light stabilizers, antiozonants, processing aids, plasticizers, tackifiers, blowing agents, dyes, pigments, waxes, diluents, organic acids, vulcanization retardants, metal oxides, and activators. Rubber mixtures can be used to make moulded articles and modify the toughness of thermoplastics.

EFFECT: improving the properties of compounds.

16 cl, 3 tbl, 1 dwg