PROCESS FOR PREPARING STABILIZED CIS-1,4-BUTADIENE RUBBER Russian patent published in 1994 - IPC

FIELD: preparation of rubber. SUBSTANCE: butadiene is polymerized in an organic solvent in the presence of a stereospecific catalytic system followed by deactivation of the catalyst, addition of a stabilizer to a mixture of steric-hindered mono-, bis-, tris, tetraphenols and C₁₆-C₃₀ paraffinonaphthenic hydrocarbons in the following ratios (wt parts):12.5-19.2 4-methyl-2,6-di-tert-butylphenol; 54.3-61.3 2.2′-methylenebis (4-methyl-6-tert-butylphenol); 2.5-8.0 2,6-bis 5′-methyl-3′-tert-butyl-2,4-hydroxybenzyl)-4′-methylphenol; 1.0-8.8(2.2′-methylenebis 5′-methyl-5′-methyl-3′-tert-butyl-2′-hydroxybenzyl)-4-methylphenol; 15.8-16.3 C₁₆-C₃₀ paraffinonaphthenic hydrocarbons in an amount of 0.009-0.015 wt part per 100 wt parts tubber followed by washing off with degassing, and drying. EFFECT: improved properties of the rubber. 1 tbl