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    Ethanox™ 330 for Power Cable Applications

Power cables account for three-quarters of the global wires and cables market. The fast-growing industry demands quality solutions and high-performance additives to help you differentiate your products from competition such as superior endurance and weathering resistance.

ETHANOX™ 330 is a hindered phenolic antioxidant that is specifically engineered for exceptional protection and long term stability in wire and cable insulations and jacketing applications. Ethanox™ 330 is featured with superior resistance to hydrolysis for use in tough applications and harsh conditions such as power cables and wires.

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Why ETHANOX™ 330 is the best antioxidant for wires and cables

Electrically neutral, ETHANOX™ 330, is extremely effective in polyethylene wire insulation which typically requires long-term protection while exposed to copper. See below for heat stability test results for ETHANOX™ 330 in HDPE and LDPE plastics for cable applications:

    Thermal stability of Low-Density Polyethylene (LDPE) in presence of Copper, oven-aged at 105°C

    The test results in the following table show that ETHANOX 330 antioxidant is particularly effective in LDPE plastics for wires and cable applications.
    Antioxidant %wt. Hours to Failure

    ETHANOX™ 330



    Product A



    ETHANOX™ 330



    Product A



    Samples of low-density polyethylene (LDPE) containing TiO2, oxalic acid bis (benzylidene hydrazide) and a copper deactivator were placed on copper foil and then oven-aged.

    The formulation above contained 1% wt. TiO2 pigment and equal amounts of antioxidant and the copper deactivator.

    Thermal Stability of High-Density Polyethylene (HDPE) in presence of Copper powder at 200°C

    The test results in the following table show that ETHANOX 330 antioxidant provides excellent stability when used in HDPE wires and cables.

    Antioxidant Hours to Fail at 200°C 
    None 3
    ETHANOX 330 41
    Product A 35

    Samples of high-density polyethylene (HDPE) containing the copper deactivator were placed on copper foil for an accelerated test by Differential Scanning Calorimeter (DSC). 

    The formulation above contained 0.1% wt. of a copper deactivator, 0.5% wt. antioxidant, and 1% wt. TiO2 pigment.

If you're facing any of these issues in your cables, ETHANOX™ 330 can help!

  • Water Treeing: ETHANOX™ 330 is the ideal antioxidant for use in medium voltage XLPE and crosslinked EPDM to overcome water treeing that is typically caused by moisture exposure and electrical stress.
  • Thermal Stability for Applicances: ETHANOX™ 330 is an excellent choice for 125°C/150°C rating wires and cables that are commonly used in appliances. Due to its high temperature stability, ETHANOX™ 330 is particularly designed to pass the 150°C /3000 hr test that is required for applicance applications.

ETHANOX™ 330 Applications

ETHANOX™ 330 is typically recommended at 1 - 2 wt% for W&C formulations.
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    Powder Cables
    Medium Voltage XLPE/EPDM

    Moisture and stress resistance to overcome water-treeing
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    °C/150°C Rating Wires

    Meets the 150°C/3000 hr test for appliance wires
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    Low-voltage cables and wires

    Withstands 125°C and higher service temperature

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About Wire and Cable processing and applications:

Wire and cable insulation and jacketing products are manufactured by the extrusion of polyethylene compounds through a crosshead. The molten compound is then transferred onto the bare conductor for insulation or onto the insulated wires for jacketing.


Cable types by voltage


Low Voltage (2 kV and lower)

Resins: PVC, PE, PP, and EPDM

Medium Voltage (2 –35 kV)

Resins: XLPE and EPDM

High Voltage (35 – 300kV)

Resins: XLPE, FEP, and PTFE 

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