SUNNYJOINT Rubber additives lay the foundation for green tire development

- Oct 22, 2018-


The SUNNYJOINT Rubber additives characteristics of green tires are not only reflected in green and safe end products, such as low rolling resistance, low noise, wet skid resistance, high grip performance, etc., but also in the production process of tires, such as the use of green raw materials, green research and development. Thoughts, green process allocation, resource conservation and recycling. Among them, the greening of rubber additives has to be mentioned.


The media learned that the use of some rubber additives that are harmful to the human body and the environment during the production of traditional tires will inevitably cause adverse effects. At the same time, harmful additives will be polluted in the environment as the tires are used and worn. The manufacture of green tires requires the use of non-polluting auxiliaries and is controlled from the source to meet the requirements of green tires. Through nearly 10 years of hard work, China's rubber auxiliaries have basically achieved environmental protection and green substitution, and the production scale has accounted for about half of the global total.


It is understood that the rubber industry uses a total of six categories of additives: vulcanization system additives, also known as accelerators; protective system additives, also known as anti-aging agents; operating system additives, including plasticizers, softeners, etc.; Strong filling system additives, such as carbon black and silica, etc.; adhesion system additives, such as triazine binders; other additives such as colorants. In 2014, the total output of six major types of auxiliaries in China was about 5.8 million tons, of which carbon black and white carbon black reinforcing fillers accounted for about 80%, and accelerators and antioxidants accounted for about 16% of the total. This is the output and The three most used rubber additives.


In the 1990s, after Michelin introduced high-performance green tires with highly dispersed white carbon black, green tires were gradually accepted by the public for their comfort, safety, environmental protection and energy saving.


In recent years, the global production of green tires using white carbon has maintained an annual growth rate of 10% to 20%, and more and more original tire indicators have begun to specify the addition of white carbon. As China's requirements for environmental protection, energy conservation and comfort are getting higher and higher, the proportion of white carbon black in tires is also increasing.


At present, white carbon black exhibits excellent performance in reducing rolling resistance and improving grip performance, and thus has been widely used in snow tires, non-slip tires, and green tires. The data shows that the amount of white tire added to domestic tires in 2012 was only 180,000 tons, and by the end of this year, the use of domestic tires is expected to reach 600,000 tons.


Advances in accelerators and antioxidants have also progressed quite rapidly. Ten years ago, NOBS (N-oxydiethyl-2-benzothiazole sulfenamide) was the most important type of accelerator, which was considered harmful to humans in foreign countries. After nearly ten years of development, the safe green promoter based on the promoter NS (N-tert-butyl-2-benzothiazole sulfenamide) has basically replaced the accelerator NOBS.


Zhang Fang, assistant to the president of the Petroleum and Chemical Industry Planning Institute, pointed out that the future development of high-end rubber additives is mainly reflected in three aspects.


First, in order to meet the development needs of green tires, optimize the product structure of the reinforcing filler. Using carbon black instead of carbon black can reduce the rolling resistance of the tire. In the future, the proportion of white carbon black in reinforcing fillers will continue to rise, and the bonding aids of silane coupling agents will also develop rapidly.


The second is to promote the green clean production process of rubber additives. The largest rubber auxiliaries are accelerators and anti-aging agents, while the largest domestic anti-aging agent is anti-aging agent 4020. It is understood that the traditional 4020 production process "three wastes" output is large, the current environmentally friendly and cost-competitive production process is based on nitrobenzene, by RT (N-phenyl p-phenylenediamine) ) to produce the process route of antioxidant 4020. In recent years, many sets of anti-aging agents 4020 produced by this process have been put into production, and the traditional process routes such as the substitution of the formylanilide method should be accelerated in the future.


The third is to further promote the environmental protection of rubber additives. The recent focus is on environmentally friendly alternatives to operating system auxiliaries, such as the replacement of high polyaromatic aromatic oils with naphthenic filler oils, using the plasticizer DBD (2,2-dibenzamide diphenyl disulfide) instead. Plasticizer B (pentachlorothiophenol).


With the in-depth development of the concept of green tires, some domestic enterprises and research institutes have begun to study green tire technology. In addition to additives, the entire industry chain of domestic tire manufacturing, materials, equipment, machinery, etc. is also developing at the same time, and all the foundations are being cultivated one after another. These have laid a good foundation for the development of China's green tires, and China will be closer to achieving the goal of becoming a world tire industry.