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Two rubber technologies of CNPC are set to be put into industrial use

2020-07-22View Original

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On July 10, reporters learned that the Research Institute of Petroleum and Petrochemicals of China National Petroleum Corporation and Shandong Yulong Petrochemical Co., Ltd. officially signed contracts for the licensing of butyl rubber and integrated rubber technologies. “The industrialization of these two major technological achievements through Yu Long Petrochemical, Shandong’s largest refining and chemical enterprise, marks a new historic breakthrough in the high-quality development of China’s synthetic rubber industry and its pursuit of becoming a global leader in this field. ”The persons in charge of these two technologies stated that once they are industrialized, they will not only further strengthen Shandong Province’s overall strength as the largest province in China for the chemical industry and tire production, enabling it to become a leader in China’s synthetic rubber and tire sector, but will also facilitate meaningful efforts to accelerate the transformation of research results and achieve high-quality development in the synthetic rubber industry. Butyl isoprene rubber (BIR) is a copolymer rubber of butadiene and isoprene, and it is a synthetic rubber that has not yet been put into industrial production in China. In addition to retaining the excellent properties of styrene-butadiene rubber, such as wear resistance, good elasticity, cold resistance, and low heat generation, butadiene-acrylonitrile rubber also shows significant improvements in terms of resistance to slippage, tensile strength, tear resistance, and the adhesion of semi-finished products, as well as in its performance when rolled during mixing. It particularly excels in terms of resistance to flexural cracking, and it also possesses excellent low-temperature resistance (its brittleness temperature is below minus 80 degrees Celsius). Therefore, butyl rubber will be widely used in high-performance tires, as well as in low-temperature components and sealing materials required by special industries, offering broad prospects for industrial application. Integrated rubber is the third-generation solution-polymerized styrene-butadiene rubber produced through negative ion solution polymerization. It combines the advantages of natural rubber, cis-butadiene rubber, and styrene-butadiene rubber, enabling optimal balance among a tire’s resistance to skidding, rolling resistance, and wear resistance – the so-called \"magic triangle\" of performance characteristics – and thus exhibits excellent performance in high-performance tires. From 2011 to 2019, with the support of the Petroleum Technology Management Department of China National Petroleum Corporation, the researchers at the Petrochemical Research Institute (China National Petroleum Corporation Synthetic Rubber Testing Base), relying on the key research and development project \"Key Technologies for the Industrialization of High-Performance Synthetic Rubbers\", carried out eight years of continuous efforts. As a result, they developed a series of technologies for the pilot and pilot-scale production of butyl acrylate rubber and integrated rubber. Moreover, important engineering data was obtained during the pilot studies, enabling the creation of technology packages for the production of 30,000 tons per year of butyl acrylate rubber and 30,000 tons per year of integrated rubber, all of which possess independent intellectual property rights – thus filling a gap in China’s domestic capabilities in this area. According to statistics from the International Institute of Synthetic Rubber Production (IISRP), the total global production capacity for synthetic rubber in 2019 was 20.415 million tons. Our country is the largest producer and consumer of synthetic rubber. In 2019, the synthetic rubber production capacity in the Chinese mainland was 5.93 million tons. Styrene-butadiene rubber and cis-butadiene rubber were the two main types of synthetic rubber in China, with production amounts of 1.71 million tons and 1.53 million tons respectively. The average market share of the seven major types of adhesives in the domestic market is 74.2%; generic grades hold a dominant position, while the remaining market is dominated by high-end imported products from abroad. It is evident that our country is not yet a strong nation in synthetic rubber production; it imports over 1 million tons of high-end products each year, worth more than 18 billion yuan. Over 50% of synthetic rubber is used in automobile tires. Our country is a major producer, consumer, and exporter of tires, but there is still a significant gap compared to advanced foreign levels in terms of the sophistication of our products. According to the EU labeling law, domestic tires are 2-3 grades lower than high-end foreign products. The key problems are the poor performance of high-performance synthetic rubber base materials (solution-polymerized styrene-butadiene, rare-earth cis-butadiene rubber), as well as outdated tire manufacturing processes and formulations. As the most critical basic materials for manufacturing high-performance tires, high-performance rare-earth cis-butadiene/butadiene-acrylonitrile rubber, as well as third/fourth-generation solution-polymerized styrene-butadiene rubber, have not yet been put into industrial production. The localization of high-performance polycondensed styrene-butadiene rubber and rare-earth cis-butadiene/butadiene-acrylonitrile rubber products can not only improve the quality of domestic synthetic rubber products but also play a role in promoting the upgrading of the domestic tire industry.

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