Butanox LPT-IN

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Organic peroxide

Butanox LPT-IN:General purpose MEKP for extra long geltimes in standard orthophthalic resins, and the product choice for curing vinylester resins.

  • Product name

    Butanox LPT-IN
  • Chemical family

    Organic peroxide
  • CAS number

  • Physical form

  • Regional availability

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

    Methyl ethyl ketone peroxide
  • Applications

    Butanox LPT-IN is a methyl ethyl ketone peroxide (MEKP) for the curing of unsaturated polyester resins in the presence of a cobalt accelerator at room and elevated temperatures.Butanox LPT-IN gives in comparison with most other ketone peroxides a significantly longer gel time and is therefore particularly suitable for those applications where a long gel time or production time is required, for instance in the production of large parts and in filament winding.Also in areas with high ambient temperatures Butanox LPT-IN is of particular interest. Butanox LPT-IN is especially recommended for the cure of vinyl ester resins. This MEKP formulation gives less "foaming" than standard MEKP's. Practical experience throughout many years has proven that by the guaranteed low water content and the absence of polar compounds, Butanox LPT-IN is very suitable in GRP products for e.g. marine applications. The low hydrogen peroxide content of Butanox LPT-IN makes this peroxide very suitable for the cure of those gelcoats, which tend to microporosity caused by the decomposition of the hydrogen peroxide.

Market Segments

Thermoset composites

Detailed description

Methyl ethyl ketone peroxide (MEKP) for curing unsaturated polyester resins in the presence of a cobalt accelerator at room and elevated temperatures. Very suitable for extra slow-gelling and marine applications, and specially designed for filament winding.


  • Curing agent


  • Gelcoats,
  • Coatings,
  • Continuous Laminating,
  • Resin Transfer Molding,
  • Filament winding,
  • Vinylesters,
  • Hand lay up and spray up