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

SI Group AT DSTP Antioxidant

SI Group AT DSTP Antioxidant is a high-performance hindered phenolic antioxidant from SI Group’s AT Series, designed for polymer stabilization in demanding thermal and oxidative environments. It offers exceptional melt protection, low volatility, and compatibility with polyolefins, elastomers, and engineering plastics. Widely used in automotive, cable, and packaging applications for extended service life and color retention.
  • si group at dstp antioxidant_5accd32a
  • si group at dstp antioxidant_5accd32a

Features Of SI Group AT DSTP Antioxidant

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

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

  3. Synergistic with primary antioxidants (e.g., hindered phenols) for enhanced oxidative stability in polymer systems.

  4. Low color contribution and minimal odor, supporting use in demanding applications including food-contact and medical-grade polymers.

  5. Consistent batch-to-batch quality and regulatory compliance aligned with major global standards (e.g., FDA 21 CFR §178.2010, EU Directive 10/2011).

Typical Applications Of SI Group AT DSTP Antioxidant

  1. Polyolefins (PP, HDPE, LDPE) for injection molding, blow molding, and extrusion.

  2. Thermoplastic elastomers (TPEs) requiring thermal stability during compounding and fabrication.

  3. Cable compounds and insulation materials exposed to elevated service temperatures.

  4. Food packaging films and containers where regulatory compliance and low extractables are critical.

  5. Automotive interior components subject to long-term heat aging and UV exposure.

Specifications Of SI Group AT DSTP Antioxidant

Chemical TypeDilauryl thiodipropionate (DSTP)
Product FormFree-flowing white to off-white crystalline powder
AppearanceWhite crystalline granules or fine powder
Melting Point40–43 °C
Assay (DSTP Content)≥ 99.0% (by GC)
Acid Value≤ 0.5 mg KOH/g
Heavy Metals (as Pb)≤ 10 ppm
Primary ApplicationsSecondary antioxidant for polyolefins, TPEs, cables, food packaging, automotive plastics


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