High Impact Polystyrene

High Impact Polystyrene (COMPRZ)

COMPRZ is a high impact resistant Polystyrene. It has a lower modulus, better elongation, and is a lot less brittle than crystal styrene. Some uses include tubing, appliance components, housings, covers, and food contact. This compound is designed for applications requiring the following properties:

  • Flame Retardant
  • High Impact Resistance
  • High Gloss
  • FDA 21 CFR 177.1640
  • Good dimensional stability
  • Low Volatility
  • Informational Download

    Download the PDF version of the information on this page below.

    Typical Properties Nominal Value ASTM Test Method
    Specific Gravity 1.04 D-792
    Hardness (R-scale) 103 D-785
    1/8″ Izod Impact, ft/lbs in notch 1.8 D-256
    Tensile Yield Strength, 103 psi (Injection Molded) 2.76 D-638
    Tensile Modulus, 105 psi (Injection Molded) 2.61 D-638
    Flexural Strength, 103 psi (Injection Molded) 5.22 D-790
    Flexural Modulus, 105 psi 2.76 D-790
    DTUL @264 psi, ℃ unannealed 78.0 D-648
    CLTE 5.0×10-5/in ℉ D-696
    Flame Class HB UL-94

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