Trigonox 178

Organic peroxides

Organic peroxide

Trigonox 178 is a MEKP/CHP blend with supressed exotherm for curing promoted unsaturated polyester resins.

  • Product name

    Trigonox 178
  • Chemical family

    Organic peroxide
  • CAS number

    1338-23-4; 80-15-9
  • Physical form

  • Regional availability

    Latin America, North America
  • Chemical name

    Methyl ethyl ketone peroxide and cumyl hydroperoxide solution in 2,2,4-trimethyl-1,3-pentanediol diisobutanoate
  • Applications

    Trigonox 178 is a convenient pre-blended initiator suitable for curing unsaturated polyester, vinyl ester and acrylic thermosetting resins at ambient conditions in conjunction with a metal salt. Trigonox 178 produces lower exotherms than standard MEKP’s and is useful in warm and hot weather climates. Applications include cast polymer and laminates.Additional end-use information is available in various application sheets or directly from your Nouryon representative.

Market Segments

Thermoset composites

Detailed description

Trigonox 178 is a slower reactivity MEKP/CHP blend for curing promoted unsaturated polyester matrices at room temperature used to suppress exotherm in thick or hot parts.


  • Curing agent


  • Centrifugal casting,
  • Resin Transfer Molding,
  • Hand lay up and spray up,
  • Infusion


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For more information about Trigonox 178, please contact our technical experts. We look forward to hearing from you.