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

SI Group AT-1135 Antioxidant

SI Group AT-1135 Antioxidant is a high-performance hindered phenolic antioxidant from the SI Group’s AT-series, designed for polyolefins and elastomers. It delivers exceptional thermal stability, low volatility, and excellent processing safety. Widely used in PP, PE, and TPE applications, it ensures long-term polymer protection against oxidative degradation during manufacturing and end-use.
  • si group at 1135 antioxidant_f552508a
  • si group at 1135 antioxidant_f552508a

Features Of SI Group AT-1135 Antioxidant

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

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

  3. Non-staining and low odor—ideal for applications requiring high aesthetic and processing performance.

  4. Effective at low dosage levels (0.1–0.5 wt%), delivering cost-efficient stabilization.

  5. Meets major global regulatory requirements including FDA 21 CFR §178.2010 and EU Directive 10/2011 for food-contact plastics.

Typical Applications Of SI Group AT-1135 Antioxidant

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

  2. Polyethylene (PE) films used in packaging, agricultural mulch, and geomembranes.

  3. Thermoplastic elastomers (TPEs) in automotive interior components and consumer goods.

  4. Engineering plastics such as polybutylene terephthalate (PBT) and polyamide (PA) compounds.

  5. Recycled polymer streams requiring robust melt stabilization during reprocessing.

Specifications Of SI Group AT-1135 Antioxidant

Chemical TypeHindered phenol
Product FormFree-flowing white to off-white powder
AppearanceCrystalline powder
Melting Point168–172 °C
Assay (by HPLC)≥ 99.0%
Volatile Matter (105 °C, 2 h)≤ 0.3%
Heavy Metals (as Pb)≤ 5 ppm
Primary ApplicationsPolyolefins, TPEs, engineering thermoplastics


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