Trigonox 44B

Product Line Organic peroxides

Trigonox® 44B is a fast-curing acetylacetone peroxide used for standard unsaturated polyester resins, but also ISO and ISO/NPG resins to achieve a faster cure than obtained with Butanox M-50, including a vanishing red (VR) indicator system.

  • Brand

  • Chemical family

    Organic peroxide
  • CAS number

  • Physical form

  • Regional availability

    Africa, Asia Pacific, Europe, Latin America, Middle East, North America
  • Chemical name

  • Molecular drawing

    Organic peroxide
  • Applications

    Trigonox® 44B is an acetyl acetone peroxide formulation for the curing of unsaturated polyester resins in the presence of a cobalt accelerator at room and elevated temperatures. With the curing system Trigonox® 44B/cobalt accelerator a much faster speed of cure may be achieved than with curing systems based on a MEKP plus cobalt accelerator, at room and elevated temperatures. Normally the gel times with Trigonox® 44B are comparable to those with Butanox M-50. Trigonox® 44B is particularly suitable in those applications where a fast mold-turnover is required, e.g. for the cold press molding or resin injection molding techniques. The system Trigonox® 44B/cobalt accelerator will give a higher peak exotherm than a standard MEKP/cobalt accelerator system. Due to this fact, is it recommendable to avoid the production of too thick laminates in one operation. At low temperatures a reasonable speed of cure is still obtained when Trigonox® 44B is used in combination with large amounts of cobalt accelerator possibly in combination with N,N Dimethylaniline as promotor.

Market Segments

Thermoset composites

Detailed description

Trigonox® 44B is an acetylacetone peroxide formulation for fast curing of unsaturated polyester resins in the presence of a cobalt accelerator at room and elevated temperatures, including a VR system.


  • Curing agent


  • Engineered Stone,
  • Centrifugal casting,
  • Continuous Laminating,
  • Resin Transfer Molding,
  • Filament winding,
  • Hand lay-up & spray-up
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For more information about Trigonox 44B, please contact our technical experts. We look forward to hearing from you.

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