Tokyo-based Zeon Corporation and Visolis have signed a binding term sheet to strengthen their collaboration for commercialising bio-based isoprene monomer and sustainable aviation fuel (SAF) as well as a final investment decision (FID) for a production facility.

Under this term sheet, the two companies reached a basic agreement on business structure, roles and responsibilities, technology and development policies, detailed engineering for the production facility and assessment of candidate sites, engagement of suppliers and regulatory approvals, and the financing process.

This agreement builds on earlier agreements between the two companies in March 2024 and the announcement of a joint feasibility study in April 2025.

Zeon had announced its investment in Visolis through its California-based venture capital arm Zeon Ventures California in February 2023.

The planned facility is expected to begin commercial-scale production following the demonstration of mass production technology for biomass-based isoprene monomers and SAF using Visolis’ proprietary technology.

Bio-isoprene monomer is a key raw material for synthetic rubbers and other products.

Zeon and Visolis will continue to work toward the early realisation of commercial production and the supply of products to the market.