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

Addivant WESTON 399 Antioxidant

Addivant WESTON 399 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 399 antioxidant_afe82003
  • addivant weston 399 antioxidant_afe82003

Features Of Addivant WESTON 399 Antioxidant

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

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

  3. Non-staining and low odor—ideal 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 399 Antioxidant

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

  2. Automotive interior components including dashboards, trim, and under-hood parts.

  3. Packaging films and containers for food-contact and pharmaceutical applications.

  4. Injection-molded and extruded polyethylene (PE) and PP consumer goods.

  5. Recycled polymer streams requiring robust stabilization against processing degradation.

Specifications Of Addivant WESTON 399 Antioxidant

Chemical TypeHindered phenol
Product FormFree-flowing white to off-white powder
AppearanceWhite crystalline powder
Primary ApplicationsPolyolefins (PP, PE), styrenics, engineering plastics
Key FeaturesThermal stability, low volatility, non-staining
BenefitsExtended polymer service life, reduced discoloration, enhanced melt stability
Recommended Use Level0.1–0.5 wt% depending on polymer and processing conditions
Regulatory ComplianceMeets FDA 21 CFR §178.2010; EU Directive 10/2011 compliant for food-contact applications


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