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Processing stabilizer for coatings and plastic materials

Hostanox® P-EPQ® pills

Hostanox P-EPQ pills is a highly efficient phosphorus based secondary antioxidant, which reduces the thermo-oxidative degradation of polymers and the development of undesired colour (yellowing) during processing. The main advantages of Hostanox P-EPQ pills are its high thermal stability and high solubility in polymeric materials as well as its broad compatibility in coating polymers.


  • Low dosage
  • High performance in color and melt flow retention during conversion process
  • White application window allowing high processing temperatures
  • Low softening temperature providing early stage protection in extrusion processes
  • Significant contribution to dyne level retention
  • High solubility in polymer virtually no haze or blooming
  • High contribution to thermal stability of filled Polyolefin and engineering plastic compounds
  • Higher contribution to Polypropylene clarity compared to other processing stabilizers
  • Low plate out, low die buildup
  • Preventing formation of char and specks


  • High contribution to termal yellowing reduction during processing and long term heat stability
  • Inhibit discoloration due to Stoving/NOx
  • Reduce Gas Fading
The product does not require a hazard warning label according CLP regulation (Regulation (EC) No. 1272/2008, as amended).
For further information please refer to the Material Safety Data Sheet.
Physical Properties
Softening Point  85-95 °C
Specific Gravity 1.04 g/cm3
Molecular Weight 1035 g/mol
Solubility at 20 °C (in g/100g)  
Water < 0.01
Toluene > 50
Ethyl Acetate > 50
Ethanol 10
Application Coatings
Hostanox P-EPQ pills is recommended especially for the applications where polymers and/or binders are cured at elevated temperature and need thermo-stabilization, e.g. powder coatings, coil coatings and specific solventborne coatings (automotive for ex.).
Application Plastics
Hostanox P-EPQ pills is suitable for most kinds of thermoplastic polymers. It is recommended especially for the stabilization of polyolefins (LLDPE, HDPE, PP), ABS, PS, polybutylene, PBT, PC, PA, thermoplastic polyester, nitrile barrier resins, etc.
Packaging and Handling
Delivery form
The product is also available in other physical forms.

Cardboard box 480 kg with 24 PE bags of 20 kg
Cardboard box 200 kg with 20 PE bags of 10 kg

Minimum shelf life is 2 years from date of shipping when properly stored in the original sealed packaging.
The product should be stored dry and at room temperatures and processed immediately after opening the packaging.

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Hostanox® P-EPQ® pills

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