Application of neodymium butadiene rubber BR 9101 N in the formula of support compound of run-flat tire

The application of neodymium based cis-1,4-polybutadiene rubber (Nd-BR) BR 9101 N in the formula of support compound of run-flat tire was studied, and compared with those of foreign same type product Nd-BR CB 24. The results showed that Nd-BR BR 9101 N could meet the requirements for incoming inspection of Nd-BR raw material, and the basic compounding performance could be met. When Nd-BR BR 9101 N was used in the formula of support compound of run-flat tire to replace Nd-BR CB 24 with the same amount, Mooney viscosity, scorch time and curing characteristics of the former compound, and physical and mechanical property of Nd-BR BR 9101 N vulcanizate before and after aging were basically the same to those of the latter, and the aging performance of the former improved, whereas the compression fatigue temperature rise and compression set all reduced compared with those of the latter. The high-speed durability of finished tire made from Nd-BR BR 9101 N was good and could meet the product design requirements and exceeded the national standard regulations, which were basically equivalent to those of the existing production tire, in addition, the strength performance and zero-pressure durability of finished tire made from Nd-BR BR 9101 N improved compared with those of the existing production tire.