| 摘要 |
For use in a fuel cell separator comprising a separator substrate, a primer layer, and an elastomeric seal, a sealing material comprises a primer composition containing Si-H groups of which the primer layer is formed, and a liquid addition-curable silicone rubber composition containing alkenyl groups and Si-H groups of which the elastomeric seal is formed. A molar ratio of the total amount of Si-H groups to the total amount of alkenyl groups per unit weight of the primer composition and the silicone rubber composition is in the range: 5.0<Si-H/alkenyl<50.0.
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