In the realm of polymer stabilization, choosing the correct antioxidant is crucial for ensuring product performance, longevity, and resistance to degradation. Two of the most widely recognized and utilized hindered phenolic antioxidants are Antioxidant 1076 and Antioxidant 1010. While both serve the fundamental purpose of preventing oxidative breakdown, they possess distinct chemical structures and performance characteristics that make them suitable for different applications. For procurement managers and R&D scientists, understanding these differences is key to making informed purchasing decisions. As a leading manufacturer and supplier of these vital chemicals from China, we aim to provide this comparative insight.

Antioxidant 1076: The Versatile Performer

Antioxidant 1076, or Octadecyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, is a monofunctional hindered phenolic antioxidant. Its molecular structure features a single sterically hindered phenolic group. This structure contributes to its excellent compatibility with a wide range of polymers, including polyolefins (PE, PP), styrenics, polyurethanes, and elastomers. Its key advantages include:

• Good all-around protection: Effective against thermo-oxidative degradation.
• Low volatility: Ideal for high-temperature processing.
• Good resistance to extraction: Remains in the polymer matrix under various conditions.
• Non-toxic and non-polluting: Suitable for sensitive applications, including indirect food contact.
• Synergistic potential: Works well with secondary antioxidants.

Its molecular weight is around 530.87 g/mol. The 'octadecyl' tail provides good compatibility and solubility in polymer melts.

Antioxidant 1010: The High-Performance Protector

Antioxidant 1010, or Pentaerythritol tetrakis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate), is a tetrafunctional hindered phenolic antioxidant. Its structure comprises four sterically hindered phenolic groups attached to a central pentaerythritol core. This multi-functional nature imparts:

• Higher molecular weight (approx. 1178 g/mol): Leads to even lower volatility and better long-term heat aging resistance.
• Exceptional long-term thermal stability: Ideal for polymers processed at very high temperatures or requiring extended service life under thermal stress.
• Enhanced resistance to extraction: Its larger size and structure make it more difficult to extract.
• Lower blooming tendency: Less likely to migrate to the surface of the polymer.

However, its higher molecular weight might sometimes lead to slightly lower solubility or compatibility in certain polymer systems compared to Antioxidant 1076.

Key Differences and Selection Criteria

When deciding which to buy, consider the following:

• Processing Temperature: For very high processing temperatures and demanding long-term heat aging requirements, Antioxidant 1010 often offers superior performance due to its lower volatility and higher thermal stability.
• Extraction Resistance: If the end-product will be exposed to solvents or liquids, Antioxidant 1010's higher molecular weight provides better resistance to extraction.
• Compatibility and Blooming: For standard processing conditions and applications where blooming is a concern, Antioxidant 1076 may be preferred for its balanced properties and compatibility.
• Cost-Effectiveness: While both are high-performance additives, pricing and dosage requirements may influence the choice.

Both antioxidants can be used in conjunction with secondary stabilizers for maximum effect. For example, combining Antioxidant 1076 or 1010 with phosphites or thioesters provides comprehensive protection.

Reliable Sourcing from China

As a leading manufacturer and supplier of both Antioxidant 1076 and Antioxidant 1010 in China, we are equipped to meet your specific needs. We ensure high purity (typically >98.0% assay) and consistent quality for both products. Procurement managers and R&D scientists can rely on us for competitive pricing and dependable supply chains. To discuss your application requirements, obtain a quote, or request samples of either Antioxidant 1076 or Antioxidant 1010, please reach out to our dedicated sales team. We are here to support your polymer stabilization strategies.