Trigonox 178

Product Line Organic peroxides

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

  • Brand

  • Chemical family

    Organic peroxide
  • CAS number

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

  • Regional availability

    North America
  • Chemical name

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

    Organic peroxide
  • 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.

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,
  • Infusion,
  • Hand lay-up & spray-up
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Get in touch!

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

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