Specialty chemicals company LANXESS has developed a new range of MDI polyether prepolymers containing renewable, bio-based raw materials. Marketed under the brand name Adiprene Green, the products are suitable as replacement for existing fossil based polyether prepolymers to manufacture highly durable polyurethane (PU) elastomers. The overall objective to develop Adiprene Green was to create a range of bio-based prepolymers which allow the PU processor to produce components with a reduced CO2 footprint.