Laurox W-40

Product Line Organic peroxides

Laurox W-40 is an initiator for (co)polymerization of vinyl chloride, vinylidene chloride and (meth)acrylates.

  • Brand

  • Chemical family

    Organic peroxide
  • CAS number

  • Physical form

  • Regional availability

    Africa, Asia, Asia Pacific, China, Europe, Global, India, Latin America, Middle East, North America, Oceania
  • Molecular Weight

  • Concentration

  • Chemical name

    Dilauroyl peroxide
  • Molecular drawing

    Organic peroxide
  • Applications

    Laurox W-40 is widely used as an initiator for the micro-suspension polymerization of vinyl chloride in the temperature range between 60°C and 80°C. In many cases Laurox W-40 is combined with a more active initiator such as a peroxydicarbonate (e. g. Perkadox 16) to increase reactor efficiency. Reasons to use a water-based peroxide suspension instead of a solid or solvent-based peroxide are the following: enhanced safety, solvent free (no contamination of the VCM recycle stream), enhancement of PVC purity, easy to use (pumpable) in ‘closed reactor technology’, easy to dilute with water.

Market Segments

Polymer production

Detailed description

Initiator (40% water-based suspension) for micro-suspension polymerization of vinyl chloride, vinylidene chloride, acrylates and methacrylates. Easy to dose liquid formulation, and possible to store at ambient temperatures.


  • Polymerization initiator


  • PVC
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