Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

Addivant WESTON 398 Antioxidant

Addivant WESTON 398 Antioxidant is a high-performance hindered phenolic antioxidant from Addivant’s WESTON® series, designed for polyolefins and elastomers. It offers exceptional thermal stability, low volatility, and synergistic performance with phosphites. Widely used in PP, PE, and TPO applications to prevent oxidative degradation during processing and long-term service life.
  • addivant weston 398 antioxidant_f9020135
  • addivant weston 398 antioxidant_f9020135

Features Of Addivant WESTON 398 Antioxidant

  1. High-performance hindered phenolic antioxidant offering exceptional thermal and oxidative stability.

  2. Low volatility and excellent compatibility with polyolefins, engineering thermoplastics, and elastomers.

  3. Non-staining and low odor—suitable for applications requiring high aesthetic and sensory performance.

  4. Effective at low use levels (0.1–0.5 wt%), delivering cost-efficient stabilization.

  5. Resistant to extraction and migration, ensuring long-term protection in demanding service environments.

Typical Applications Of Addivant WESTON 398 Antioxidant

  1. Polypropylene (PP) fibers and nonwovens for medical and hygiene products.

  2. Polyethylene (PE) films used in food packaging and agricultural mulch.

  3. Automotive interior components including PP and TPO trim parts.

  4. Rotomolded polyethylene tanks and industrial containers.

  5. Thermoplastic elastomers (TPEs) in consumer goods and sealing applications.

Specifications Of Addivant WESTON 398 Antioxidant

Chemical TypeHindered phenol
Product FormFree-flowing white to off-white powder
AppearanceCrystalline powder
Primary ApplicationsPolyolefins (PP, HDPE, LDPE), TPOs, TPEs, and elastomers
Key FeaturesThermal stability, low volatility, non-staining, low odor
BenefitsExtended processing window, improved melt stability, enhanced long-term aging resistance
Recommended Use Level0.1–0.5 wt% depending on polymer and processing conditions
Storage ConditionsStore in original unopened containers at <30°C, protected from moisture and direct sunlight


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