Sulfur Antioxidants vs Phenolic Antioxidants: Key Differences

Chemical Classification

Phenolic Antioxidants (주요한)

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

Sulfur (Thioester) Antioxidants (Secondary)

• DLTDP (CAS 123-28-4): C12 chains, standard polyolefin grade
• DSTDP (CAS 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 (항산화제 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. 저희에게 연락하십시오 for pricing and samples.