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About Ethylene Propylene Rubber (EPDM)

EPDM is a comparatively new rubber material that was first successfully synthesized in 1955. It was initially a copolymer of ethylene and propylene (EPM), but because it did not have a double bond inside the molecule, it had the disadvantage that sulfur vulcanizing could not be carried out. However, due to later research, a diene component was added as the third component, and in this way so-called EPDM was developed.
Because the polymer main chain component does not have a double bond, the material’s ozone resistance is extremely good, while the electrical insulation, heat resistance, and cold resistance are also favorable.
On the other hand, because the material has no resistance to nonpolar solvents including gasoline and mineral oils, it has the disadvantage that it cannot be used in automotive fuel systems.

Our EPDM products are mainly used in automotive brake products and water faucet related components.
For EPDM, compounding technology provides the key.
It is important to establish rubber composites that can be easily blended with various chemicals while satisfying the market needs.
We are establishing EPDM composites that match the needs of customers, and are leading other companies with the industry’s highest levels of compounding technology.

Merits of Ethylene Propylene Rubber
・Heat resistance
・Ozone resistance
・Brake fluid resistance
・Cold resistance
・Electrical insulation

Main Applications of Ethylene Propylene Rubber
・Brake fluid-resistant sealing materials for automobiles
・Diaphragms for water pipe pressure reducing valves
・Sealing materials for water pipes
・Diaphragms for pneumatic equipment