熱ねつ硬こう化か剤ざい

noun

hardener; curing agent

Technical term for a catalyst or additive that causes thermosetting resins to harden.

• エポキシ樹じゅ脂しには熱ねつ硬こう化か剤ざいを加くわえて硬こう化かさせる。

  A hardener is added to epoxy resin to cure it.