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

SI Group DSTP Antioxidant

SI Group DSTP Antioxidant is a high-performance sulfur-based antioxidant from the SI Group’s DSTP series, designed for polymer stabilization in rubber and thermoplastics. It offers exceptional heat resistance, low volatility, and synergistic effects with phenolic antioxidants, ensuring extended service life and reduced discoloration in demanding industrial applications.
  • si group dstp antioxidant_77f80475
  • si group dstp antioxidant_77f80475

Features Of SI Group DSTP Antioxidant

  1. High-efficiency secondary antioxidant based on dilauryl thiodipropionate (DSTP) chemistry.

  2. Excellent hydrolytic stability and low volatility, ensuring long-term performance in high-temperature processing.

  3. Synergistic with primary antioxidants (e.g., hindered phenols) to enhance overall oxidative resistance.

  4. Low color formation and minimal odor—ideal for demanding color-critical and consumer-facing polymer applications.

  5. Compliant with major global food-contact regulations including FDA 21 CFR §178.2010 and EU Directive 10/2011 (subject to specific migration limits).

Typical Applications Of SI Group DSTP Antioxidant

  1. Polyolefins (PP, HDPE, LDPE) for injection-molded automotive parts and packaging films.

  2. Wire & cable insulation and jacketing compounds requiring thermal aging resistance.

  3. Rotomolded polyethylene tanks and industrial containers exposed to prolonged heat and UV stress.

  4. Food-grade plastic containers, caps, and closures where regulatory compliance and low extractables are critical.

  5. Recycled polyolefin blends, where DSTP helps mitigate degradation during multiple extrusion cycles.

Specifications Of SI Group DSTP Antioxidant

Chemical TypeDilauryl thiodipropionate (DSTP)
Product FormFree-flowing white to off-white granules
AppearanceGranular, uniform particle size distribution
Melting Point40–43 °C
Assay (by GC)≥ 99.0%
Acid Value (mg KOH/g)≤ 0.5
Heavy Metals (as Pb)< 5 ppm
Primary ApplicationsPolyolefins, wire & cable, food-contact plastics, recycled polymers


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