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Application
AO 412S is a low-volatility, high-molecular-weight organosulfur-containing antioxidant, specifically developed for polyolefins and engineering plastics. It is particularly suited for products demanding high-temperature resistance and long-term aging performance. When compounded with hindered phenolic primary antioxidants, AO 412S delivers superior stability compared to traditional thioether antioxidants (e.g., DLTDP, DSTDP). Boasting excellent anti-extraction and anti-migration properties, this product is ideal for polyolefin end products prone to water impregnation or used under harsh climatic conditions, and also holds significant application value in polymer fibers.
AO 412S is suitable for long-term aging resistance applications in engineering plastics such as PP, PE, ABS, PS, PA, and PC. It is especially well-suited for low-volatility thin-walled products, thin-film materials, and polymer fibers. Its outstanding anti-extraction and anti-migration capabilities make it particularly applicable to high-temperature plumbing systems, washing machines, and dishwashers.
❓ Frequently Asked Questions
Q
What is AO 412S and what type of antioxidant is it?
AO 412S (Pentaerythritol tetris (3-lauryl thiopropionate), CAS 29598-76-3) is a low-volatility, high-molecular-weight organosulfur-containing secondary antioxidant. It is specifically developed for use in polyolefins and engineering plastics, providing excellent long-term thermal stability and aging resistance.
Q
Which polymers and plastics is AO 412S compatible with?
AO 412S is compatible with a wide range of engineering plastics and polymers, including PP (polypropylene), PE (polyethylene), ABS, PS (polystyrene), PA (polyamide/nylon), and PC (polycarbonate). It is also highly effective in polymer fibers and thin-film materials.
Q
How does AO 412S compare to traditional thioether antioxidants like DLTDP and DSTDP?
When compounded with hindered phenolic primary antioxidants, AO 412S delivers superior thermal stability and long-term aging performance compared to traditional thioether antioxidants such as DLTDP and DSTDP. Its higher molecular weight also contributes to significantly lower volatility and better retention in the polymer matrix.
Q
What are the key physical properties of AO 412S?
AO 412S appears as a white crystalline powder with a melting point of 48–52 ℃. It has very low volatile matter (≤ 0.5%), minimal ash content (≤ 0.1%), and an acid number of ≤ 1 mgKOH/g. It shows good solubility in benzene (83 g/100ml) and n-hexane (20.7 g/100ml), but very limited solubility in methanol and water (< 0.01 g/100ml).
Q
Is AO 412S suitable for products exposed to water or harsh outdoor conditions?
Yes. AO 412S features outstanding anti-extraction and anti-migration properties, making it particularly well-suited for polyolefin products prone to water impregnation or exposure to harsh climatic conditions. Typical applications include high-temperature plumbing systems, washing machine components, and dishwasher parts.
Q
Can AO 412S be used in thin-walled products and fiber applications?
Absolutely. Due to its low volatility and high molecular weight, AO 412S is especially well-suited for thin-walled products, thin-film materials, and polymer fibers where antioxidant retention is critical during processing and long-term use.
