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

Addivant WESTON 618 Antioxidant

Addivant WESTON 618 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 618 antioxidant_0f51e17a
  • addivant weston 618 antioxidant_0f51e17a

Features Of Addivant WESTON 618 Antioxidant

  1. High-performance, non-staining phenolic antioxidant for demanding polymer stabilization.

  2. Excellent thermal and long-term oxidative stability in polyolefins and engineering thermoplastics.

  3. Low volatility and high melt stability, minimizing plate-out and improving processing consistency.

  4. Compatible with other additives including phosphites, thioesters, and HALS stabilizers.

  5. Meets FDA 21 CFR §178.2010 for indirect food contact applications in polyolefin resins.

Typical Applications Of Addivant WESTON 618 Antioxidant

  1. Polypropylene (PP) fibers, films, and injection-molded automotive parts.

  2. High-density polyethylene (HDPE) and low-density polyethylene (LDPE) blow-molded containers.

  3. Polybutylene terephthalate (PBT) and polyamide (PA6, PA66) under high-temperature processing.

  4. Rotational molding and pipe extrusion compounds requiring extended thermal stability.

  5. Medical-grade polyolefin components where color stability and biocompatibility are critical.

Specifications Of Addivant WESTON 618 Antioxidant

Chemical TypeSymmetric hindered phenol (tetrakis[methylene-3-(3′,5′-di-tert-butyl-4′-hydroxyphenyl)propionate]methane)
Product FormFree-flowing white to off-white crystalline powder
AppearanceWhite crystalline solid
Melting Point120–126 °C (determined by DSC)
Assay (by HPLC)≥ 99.0%
Volatile Matter (105 °C, 2 h)≤ 0.2%
Ash Content≤ 0.05%
Primary ApplicationsPolyolefins, engineering plastics, elastomers, adhesives


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