The nitrosamine produced by the secondary amine accelerator may be carcinogenic, and may be replaced by a promoter of a primary amine structure and a benzylamine structure, such as NS instead of NOBS, such as the use of tetrabenzyldisulfide thiuram instead of TMTD in a green tire compound; Instead of PZ and EZ, zinc dibenzyldithiocarbamate was used. Rhein Chemie has developed a dithiophosphate-free accelerator that does not have nitrosamines and has a good effect in maintaining the environment.

Phenylnaphthylamine anti-aging agents are just around the corner due to toxicity. The performance of p-phenylenediamines is good, especially 4020, which is widely used. The development of anti-extraction, low-volatilization, low-diffusion and long-acting anti-aging agents is an important topic in rubber production research. It has two functional groups, p-phenylenediamine and triazine. It is resistant to static, dynamic oxygen and ozone aging. It is non-polluting. Better anti-aging agents Regarding non-polluting anti-ozone anti-aging agents, some people think that tocopherol APT and its complexes may be more reliable.