Toyota will soon become the world's first automaker to use biohydrin, a newly-developed biosynthetic rubber product, in engine and drive system hoses.

Jointly developed by Toyota, Zeon Corporation, and Sumitomo Riko Co., Ltd., biohydrin rubber is manufactured using plant-derived bio-materials instead of epichlorohydrin, a commonly-used epoxy compound.

Since plants absorb CO2 from the atmosphere during their lifespan, such bio-materials achieve an estimated 20 percent reduction in material lifecycle carbon emissions (in comparison to conventional petroleum-based hydrin rubber).

The first vehicles to use vacuum sensing hoses* made from biohydrin rubber will be produced in May, with usage expected to be rolled out to all Toyota automobiles manufactured in Japan by the end of this year.

Engine and drive system hoses require a particularly high level of oil and heat resistance. Since epichlorohydrin offers exceptional oil resistance, heat resistance, heat aging resistance, ozone resistance, and gas permeability, it is currently commonly used as a key compound in the production of rubber for components such as hoses.

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