Driven by the global trend toward carbon neutrality and sustainable manufacturing, the tire industry is undergoing a major transformation.
Green tires—characterized by low rolling resistance, high durability, and reduced VOC emissions—have become a key focus for tire manufacturers worldwide.
Among the many functional ingredients in tire compounding, silane coupling agents play a decisive role in balancing performance and sustainability.

Silane coupling agents form chemical bridges between inorganic fillers (such as precipitated silica) and organic rubber chains, improving filler dispersion and filler–rubber interfacial bonding.

This leads to enhanced dynamic properties: better wet grip, lower rolling resistance, and improved abrasion resistance.

However, most silanes in the market are still derived entirely from petrochemical feedstocks — a limitation that the industry is now eager to overcome.

Ecopower’s Breakthrough in Bio-based Silane

After years of research and process optimization, Ecopower New Materials Co., Ltd. has successfully developed a new generation of Crosile®-965 Bio-based Silane Coupling Agent.

In October 2025, the product was independently tested by Beta Analytic Laboratory (Miami, USA) using ASTM D6866-24 Method B (AMS).

The certified result shows:

Crosile-965B contains 53% bio-based carbon, calculated as a fraction of total organic carbon (TOC).

This means that more than half of the organic carbon atoms in Crosile-965B originate from renewable biological sources, such as bio-derived alcohols or epoxides, rather than fossil-based chemicals.
A 53% bio-based carbon content places Crosile-965B among the highest-performing partially bio-based silanes currently available in the market.

The Value of Bio-based Silane in Tire Applications

Silane coupling agents are not just adhesion promoters; they are performance enhancers.
By introducing renewable carbon feedstocks, Crosile-965B maintains its superior coupling efficiency while significantly reducing its lifecycle carbon footprint (LCA).

Key performance and environmental advantages

• Outstanding compatibility with silica-filled rubber systems
• Excellent balance of tensile strength, modulus, and dynamic loss (tan δ)
• Lower VOC emission and improved processing environment
• Verified sustainability with 53% bio-based carbon content (ASTM D6866, Beta Analytic certified)

This verified data supports compliance with sustainability and traceability requirements in European and North American markets — an increasingly critical factor for global tire manufacturers.

Balancing Technology and Sustainability

In developing Crosile-965B, Ecopower focused on maintaining chemical stability and coupling reactivity after the introduction of bio-based carbons.
Laboratory tests demonstrated equivalent or superior performance to traditional Si-69 in silica-rubber systems:

• Tan δ reduction
• Stable mechanical strength and modulus
• Improved silica dispersion and reduced mixing energy consumption

The product can be seamlessly integrated into existing tire formulations, enabling carbon reduction without sacrificing performance.

Toward a Greener Tire Future

As the EU and US strengthen their green chemistry regulations and tire labeling requirements, raw materials with lower carbon footprints are becoming essential.
Crosile-965B offers tire manufacturers a verified and measurable bio-based alternative, contributing to their ESG and carbon neutrality targets.

Ecopower remains committed to advancing bio-based, methanol-free, and low-VOC silane technologies,
providing sustainable and high-performance bonding solutions for the global tire industry —and helping pave the way toward the next generation of truly zero-carbon tires.