June 30, 2026

Sulfur Antioxidants vs Phenolic Antioxidants: Key Differences

Дом | Темы | 

Chemical Classification

Phenolic Antioxidants (Primary)

  • антиоксидант 1010 (КАС 6683-19-8): High MW tetrafunctional, polyolefin standard
  • антиоксидант 1076 (КАС 2082-79-3): Monofunctional, cost-effective
  • антиоксидант 1098 (КАС 23128-74-7): Preferred for polyamides

Sulfur (Thioester) Антиоксиданты (Secondary)

  • DLTDP (КАС 123-28-4): C12 chains, standard polyolefin grade
  • DSTDP (КАС 693-36-7): C18 chains, high-temperature preferred

Mechanism Comparison

Phenolic antioxidants scavenge free radicals directly — donating hydrogen to peroxy radicals to break chain propagation. They are primary antioxidants.

Thioester antioxidants decompose hydroperoxides (ROOH → ROH), preventing reinitiation of the radical chain. They are secondary antioxidants.

Application Selection

  • Choose phenolic-dominant system when service-life thermal aging is the primary concern
  • Include thioester when long-term thermal stability is required, or for cost optimization
  • For processing temperatures >220°C, prefer phosphite (антиоксидант 168) over thioester as secondary
  • For food contact, verify specific regulatory clearance for each grade

Contact SUNCHEM

Both phenolic and thioester antioxidant grades available from SUNCHEM with full technical documentation. Связаться с нами for pricing and samples.

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