China’s SBS Industry: Challenges and Opportunities During a Critical Period of Transformation

Currently, China’s SBS industry is at a critical juncture of transformation and restructuring, with market demand shifting from comprehensive expansion to significant structural differentiation. Specifically, downstream applications, particularly road asphalt modification, will continue to have strong demand support during the final stage of the 14th Five-Year Plan. Road construction is crucial for improving national infrastructure, and SBS can enhance the performance of asphalt in road asphalt modification, making it more adaptable to different road conditions and climates, thus ensuring road quality and service life. However, demand in traditional application areas such as waterproof membranes remains weak, significantly constraining overall industry demand growth. This may be due to a combination of factors, including intense market competition and a slowdown in related industries. Meanwhile, after a new round of capacity expansion, the industry is facing pressure from supply growth exceeding demand growth, leading to increasingly fierce market competition and continuously narrowing profit margins for enterprises. Statistics show that in 2024, China’s SBS production fell to 817,000 tons, capacity utilization dropped to 50.6%, demand fell to 801,000 tons, and the market size shrank to 10.414 billion yuan. This supply-demand imbalance has brought enormous challenges to companies in the industry; how to survive and develop in fierce competition has become an urgent problem for enterprises. First, let’s understand SBS. SBS is formed by anionic polymerization of styrene (S) and butadiene (B) monomers to form a triblock structure (S-B-S). It combines the thermoplastic processing properties of plastics with the high elasticity of rubber. At room temperature, it exhibits rubber elasticity; at high temperatures, it can be melt-molded and molded without vulcanization, making it an important category of thermoplastic elastomers (TPEs). Currently, SBS production processes mainly include emulsion polymerization, suspension polymerization, solution polymerization, three-step feeding method, two-step mixed feeding method, and coupling method. Different production processes have their own advantages and disadvantages, and enterprises need to choose the appropriate process based on their own actual situation to improve production efficiency and product quality. Regarding market policies, in recent years, China has successively issued a series of policies, including the “Guiding Opinions on Promoting High-Quality Development of the Petrochemical Industry during the 14th Five-Year Plan,” the “Notice on Consolidating the Upward Trend and Strengthening the Industrial Economy,” the “Beijing Green Evaluation Technical Guidelines for Asphalt Mixtures,” the “Technical Specifications for Permeable Asphalt Concrete Pavement,” and the “Industrial Structure Adjustment Guidance Catalogue (2024 Edition),” to promote the elimination of outdated production capacity and optimize the supply structure in the SBS industry, guiding the industry towards a more efficient and environmentally friendly direction. Meanwhile, the “dual carbon” target is also influencing the industry’s production layout and technology choices in the medium to long term. Enterprises need to closely follow policy guidance and actively adjust their development strategies to adapt to market changes and policy requirements. The SBS industry chain is also quite complex. The upstream mainly includes raw material suppliers such as styrene and butadiene, as well as production equipment suppliers. Styrene and butadiene are the most important raw materials for SBS production; both are petrochemical products, therefore the cost and price of SBS are closely related to fluctuations in international crude oil prices. The midstream of the industry involves SBS synthesis and production, requiring strict control of various parameters during the production process to ensure stable product quality. The downstream industry is the application market, covering many fields such as modified bitumen, shoe materials, adhesives, and waterproof membranes. From the perspective of downstream demand structure, the shoe material sector is currently the largest market for SBS in China, accounting for as much as 38.2% in 2024. In recent years, driven by consumption upgrades, the rise of domestic brands, and the concept of healthy living, the market demand for personalized, functional, and high-quality footwear has continued to increase. Sub-sectors such as sportswear, professional outdoor footwear, and comfortable shoes for the elderly have shown strong vitality. China’s footwear industry is moving from “manufacturing” to a new stage of “intelligent manufacturing” and “quality manufacturing.” SBS, with its excellent elasticity, abrasion resistance, and low-temperature flexibility, has become a core material to replace traditional vulcanized rubber and PVC in shoe sole production. Soles made with SBS are not only comfortable to wear but also offer advantages such as rich colors and lightweight construction. Furthermore, scraps can be recycled, meeting the footwear industry’s dual needs for cost reduction and environmental protection. Statistics show that China’s shoe production reached 13.357 billion pairs in 2024, a year-on-year increase of 1.3%. This steady growth in shoe production provides strong demand support for the development of China’s SBS industry. Despite the many challenges facing China’s SBS industry, it also contains certain development opportunities. With continuous technological advancements and gradual market adjustments, the industry is expected to achieve transformation and upgrading, finding new development paths. Relevant enterprises should proactively respond to market changes, increase technological innovation efforts, optimize product structure, and enhance market competitiveness to remain competitive in the fierce market environment.