Top 5 Bio-based Rubber Raw Materials to Watch in 2026: Boosting Industrial Green Transition

In 2026, the global rubber industry is transitioning from fossil-based to bio-based and circular renewable materials. Driven by dual-carbon policies and growing green demand downstream, the commercialization ofbio-based rubber is accelerating. This article highlights 5 key bio-based rubber raw materials, covering natural rubber substitution, bio-based monomer synthesis and domestic innovation, which will drive the industry’s low-carbon upgrade, ensure raw material supply security, and provide green solutions for new energy, automotive and medical sectors.

I. Industry Background: Green Transition is Inevitable

As the core green alternative to petroleum-based rubber, bio-based rubber has seen rising demand due to global "dual-carbon" strategies and stricter environmental regulations. Industry data shows the global market exceeded 10 billion RMB in 2025, projected to grow over 12% in 2026 with China accounting for over 40%. Currently, bio-based rubber has achieved technological maturity and large-scale production, forming a complete industrial chain.

II. Top 5 Bio-based Rubber Raw Materials to Watch in 2026

(I) Russian Dandelion Rubber (TKS): Optimal Natural Rubber Alternative

Russian Dandelion Rubber (TKS), derived from Russian dandelion roots, has a molecular structure and performance nearly identical to natural rubber (cis-polyisoprene), enabling direct substitution. Its key advantages: 1-year growth cycle, cold/drought resistance, and no arable land occupation. Gene-edited to 18% rubber content, it costs 22% less than natural rubber. In 2026, Continental and Michelin will expand trial production; DICP-CAS has achieved industrialization, mainly used in tires and shock absorbers to reduce reliance on Southeast Asian natural rubber.

(II) Bio-Butadiene: Core Monomer Breakthrough for Synthetic Rubber

Bio-Butadiene, made from sugarcane, corn ethanol and waste edible oil, is the core monomer for BR, SBR and NBR, with 100% bio-based content. It emits 50%–80% less carbon than petroleum-based butadiene, holds ISCC+ certification, and is compatible with existing production lines. In 2026, demonstration plants by Michelin, Zeon and Bridgestone will launch; LG Chem’s BCB-BR is in mass production, used in tires, hoses and EV battery cooling systems. Michelin’s BioButterfly™ project will complete certification and global promotion mid-2026.

(III) Bio-Based Itaconate Rubber (Bio-IRE): Domestic Innovation Benchmark

Bio-Based Itaconate Rubber (Bio-IRE), an original Chinese material from agricultural wastes (corn cobs, straw), has adjustable bio-based content (40%–100%). It is biodegradable, meets EU Class A standards for wear/oil/anti-slip performance, and costs less than petroleum-based rubber. In 2026, Jingbo Zhongju will expand mass production; its national pilot platform supports industry development. BUCT and Rio Tinto are applying it to mine conveyor belts.

(IV) Guayule Rubber: Ideal for High-End Scenarios

Guayule Rubber, from drought/salt-tolerant guayule shrubs (6-month growth cycle), had a global planting area of over 50,000 hectares in 2025, with large-scale bases in China. 92% similar to natural rubber, it has excellent low-temperature elasticity, is protein-free and non-allergenic, suitable for medical/food contact. China’s 2025 market was 4.86 billion RMB (top 3 enterprises: 63.4%), projected to reach 5.48 billion RMB in 2026. Zhejiang Hengsheng and Jiangsu Lvyuan will expand capacity; products are verified by leading tire firms and enter EV supply chains.

(V) Bio-Isoprene: Long-Term Strategic Alternative

Bio-Isoprene, bio-fermented from sugar and starch, synthesizes bio-based IR to fully replace natural rubber. With 100% bio-based content and stable supply, it reduces reliance on Southeast Asian natural rubber. In 2026, Goodyear and Covestro will scale up pilot production; domestic tire firms are conducting small-batch trials. Large-scale commercialization is expected in 3–5 years to ensure supply chain security.

III. Industry Outlook

With global "dual-carbon" goals and stricter EU CBAM regulations, bio-based rubber substitution is inevitable. In 2026, the 5 materials will accelerate commercialization: Bio-Butadiene and TKS as key priorities; Bio-IRE to expand domestic share; Guayule Rubber and Bio-Isoprene for high-end import substitution. Future technological iteration and capacity expansion will promote large-scale application, building a closed-loop rubber industry for green transition.