Breakthrough in key technologies of the hottest sy

2022-08-23
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Breakthroughs in key technologies for the industrialization of synthetic rubber

breakthroughs in key technologies for the industrialization of synthetic rubber

December 14, 2018

is expected to promote China's tire industry to rank among the world's first-class

on December 12, China National Coatings learned from the China Petroleum and Petrochemical Research Institute that the key technologies for the industrialization of synthetic rubber, a national key R & D project led by the Institute, have achieved phased results, Major technological breakthroughs have been made in the core technology fields such as star branched butyl/brominated butyl rubber synthesis and double B-class tire preparation technology. These "heavyweight" technologies have improved the overall level of China's tire industry. After industrial application, China's tire industry will rank among the world's most popular

the project is led by the China Academy of petroleum and petrochemicals. The head of the Chinese Academy of Sciences, Yang Dang, hang Dang, impact and release Dang, are jointly undertaken by seven domestic scientific research institutions and universities in the rubber field, including the spring Chemical Institute of electrical control, Dalian University of technology, Tsinghua University, Shandong Jinyu industry, yiweiyi Rubber Research Institute and Zhejiang Xinhui

star branched butyl rubber/brominated butyl rubber is an urgently needed rubber variety to improve the service life of vulcanization capsules and thin the air liner in the process of high-end tire industry in China. Star branched butyl rubber is a high-end product of butyl rubber. Its production technology is difficult, the conditions are harsh, and the polymerization temperature is nearly -100 ℃. There has been no mature technology and products in China. The project team tackled the key problems from the three aspects of polymerization raw materials, polymerization process and polymerization formula, broke through the slurry butyl rubber polymerization technology, adopted anionic polymerization technology and theory, prepared a series of branching agents with slurry stability function for cationic butyl rubber polymerization, and developed a complete set of slurry star branched butyl rubber preparation technology

in addition, after arduous research, researchers took the lead in discovering the kinetic law and regulation mechanism of bromination reaction of butyl rubber in China, and developed a new reaction process to control bromine substitution and improve bromine utilization, so that the secondary bromine selectivity of brominated butyl rubber was increased from 84.2% to 97%

vulcanization capsule is the core component of tire manufacturing and molding, which has an important impact on tire quality and cost. At present, the number of repeated use of domestic products is about 450 times, which is still a big gap compared with the foreign advanced level. It also leads to the fact that the tires made in China are 2-3 grades worse than the foreign advanced double-B tires

according to the structural characteristics of star branched butyl rubber products, the project team made innovations in processing theory, and developed a vulcanization capsule formula that will significantly speed up the development of new star branched butyl rubber materials with high temperature resistance and bending, so that its average service life can be increased by more than 15% to 527 times. Aiming at the "magic triangle" problem that the rolling resistance, wet skid resistance and wear resistance of tires cannot be improved at the same time, the project team developed the formula balance control technology of the rolling resistance and wet skid resistance of tread rubber by establishing the relationship between the microstructure of rubber and filler and the rolling resistance, wet skid resistance and dry wetland handling performance of tread rubber, The rolling resistance and wet skid resistance of the prepared 225/55zr16 tire meet the requirements of grade B

after more than 50 years of development, China's synthetic rubber industry has become the world's largest production and consumption country, but China's synthetic rubber industry thus plays a "big but not strong" role in cooling equipment, and is in the "climbing period" of transformation and upgrading

in 2017, China's annual production capacity of synthetic rubber was close to 6million tons, while the annual output was only 3.55 million tons, and the annual import volume exceeded 1million tons. The external dependence of major rubber species reached 28.5%. Domestic market competition is intense, and low-grade homogeneous competition is very serious

China is the largest tire producer in the world. According to statistics, the output of tires in China last year was 926million, and the export volume reached 60%, but it was basically concentrated in middle and low-end products such as e/d grade, with meager profits, which still fell far behind the advanced level of developed countries in Europe and the United States

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