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

Addivant DSTDP Antioxidant

Addivant DSTDP Antioxidant is a high-performance sulfur-based antioxidant from Addivant’s DSTDP series (Distearyl Thiodipropionate), widely used in polyolefins and elastomers to prevent thermal oxidative degradation during processing and service life. It offers excellent long-term stability, low volatility, and synergistic effects with phenolic antioxidants.
  • addivant dstdp antioxidant_0221983b
  • addivant dstdp antioxidant_0221983b

Features Of Addivant DSTDP Antioxidant

  1. Highly effective secondary antioxidant that synergizes with primary phenolic antioxidants to enhance long-term thermal stability.

  2. Excellent hydrolytic stability and low volatility, ensuring consistent performance during high-temperature polymer processing.

  3. Low discoloration tendency—preserves polymer clarity and color integrity in sensitive applications such as packaging films and medical tubing.

  4. Compatible with polyolefins including PP, HDPE, and LDPE, as well as engineering thermoplastics like ABS and styrenics.

  5. Meets FDA 21 CFR §178.2010 for indirect food contact applications when used at approved levels.

Typical Applications Of Addivant DSTDP Antioxidant

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

  2. Blown and cast polyethylene films used in food packaging and agricultural mulch.

  3. Automotive interior components requiring UV and heat resistance, including dashboards and trim.

  4. Medical-grade polyolefin tubing and syringes where biocompatibility and clarity are critical.

  5. Rotomolded tanks and containers exposed to prolonged outdoor service conditions.

Specifications Of Addivant DSTDP Antioxidant

Chemical TypeDialkyl sulfide-based secondary antioxidant (Distearyl thiodipropionate)
Product FormFree-flowing white to off-white crystalline powder
AppearanceCrystalline granules or fine powder
Molecular Weight649.1 g/mol
Melting Point53–57 °C
Assay (by HPLC)≥ 98.0%
SolubilitySoluble in chlorinated hydrocarbons, aromatic solvents, and hot aliphatic hydrocarbons; insoluble in water
Primary ApplicationsPolyolefins, styrenics, elastomers, and thermoplastic vulcanizates (TPVs)


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