Antioxidant 245, also known as ethylene bis(oxyethylene) bis(3-(5-tert-butyl-4-hydroxy-m-tolyl)propionate), is a highly effective phenolic antioxidant. As a reliable supplier of Antioxidant 245, I am delighted to share with you the main applications of this remarkable product.
1. Polyolefins
Polyolefins, such as polyethylene (PE) and polypropylene (PP), are among the most widely used plastics in the world. However, they are prone to oxidation during processing, storage, and use, which can lead to degradation of their physical and mechanical properties, such as reduced strength, discoloration, and embrittlement. Antioxidant 245 plays a crucial role in preventing these oxidation reactions.
During the extrusion process of polyolefins, high temperatures can cause the formation of free radicals in the polymer chains. Antioxidant 245 can react with these free radicals, interrupting the oxidation chain reaction and protecting the polymer from degradation. It has excellent thermal stability, which allows it to maintain its antioxidant activity even at high processing temperatures.
In addition, Antioxidant 245 provides long - term protection for polyolefin products during their service life. Whether it is PE films used in packaging or PP pipes for plumbing, the addition of Antioxidant 245 can significantly extend their durability and performance. For example, in agricultural PE films, which are exposed to sunlight, heat, and various environmental factors, Antioxidant 245 helps to prevent the film from becoming brittle and losing its strength over time, ensuring a longer service life for the film.
2. Engineering Plastics
Engineering plastics, such as polycarbonate (PC), polyamide (PA), and polybutylene terephthalate (PBT), are used in high - performance applications where excellent mechanical, thermal, and chemical properties are required. These plastics are often exposed to harsh conditions, including high temperatures, oxygen, and chemicals, which can cause oxidation and degradation.
Antioxidant 245 can be incorporated into engineering plastics to enhance their oxidation resistance. In PC, which is widely used in optical applications, such as lenses and CDs, oxidation can lead to yellowing and a decrease in optical clarity. By adding Antioxidant 245, the PC can maintain its transparency and optical properties over a long period.
For PA, which is used in automotive components and electrical parts, Antioxidant 245 helps to prevent the loss of mechanical strength due to oxidation. It can also improve the resistance of PA to hydrolysis, which is especially important in applications where the material is exposed to moisture.
3. Elastomers
Elastomers, including natural rubber (NR), synthetic rubber such as styrene - butadiene rubber (SBR) and ethylene - propylene - diene monomer (EPDM), are used in a wide range of applications, from tires to seals and gaskets. Oxidation can cause elastomers to harden, crack, and lose their elasticity, reducing their performance and service life.
Antioxidant 245 can be used as an antioxidant in elastomer formulations. It can effectively inhibit the oxidation of rubber molecules, preventing cross - linking and degradation reactions. In tire manufacturing, the addition of Antioxidant 245 can improve the heat resistance and aging resistance of the tire rubber, enhancing the safety and durability of the tires. For seals and gaskets, Antioxidant 245 helps to maintain their flexibility and sealing performance, even in high - temperature and oxidative environments.
4. Adhesives and Coatings
Adhesives and coatings are used to bond materials together or to protect surfaces. Oxidation can cause adhesives to lose their bonding strength and coatings to lose their protective properties. Antioxidant 245 can be added to adhesives and coatings to improve their stability and performance.
In adhesives, it can prevent the oxidation of the polymer matrix, ensuring a strong and long - lasting bond between substrates. For example, in structural adhesives used in the aerospace and automotive industries, where high - strength bonding is required, Antioxidant 245 helps to maintain the integrity of the adhesive joint over time.
In coatings, Antioxidant 245 can protect the coating film from oxidation, which can cause chalking, cracking, and loss of gloss. This is particularly important for exterior coatings, which are exposed to sunlight, oxygen, and moisture. By adding Antioxidant 245, the coating can maintain its appearance and protective function for a longer period, reducing the need for frequent recoating.
5. Comparison with Other Antioxidants
While Antioxidant 245 has its unique advantages, it is also useful to compare it with other common antioxidants such as Antioxidant 168, Antioxidant 1135, and Antioxidant MD1024.
Antioxidant 168 is a phosphite antioxidant, which is mainly used as a processing stabilizer. It works synergistically with phenolic antioxidants like Antioxidant 245. Antioxidant 168 can decompose hydroperoxides formed during processing, while Antioxidant 245 can scavenge free radicals. The combination of these two antioxidants can provide better protection for polymers during high - temperature processing.
Antioxidant 1135 is a liquid phenolic antioxidant with good solubility and compatibility. It is often used in applications where a liquid form is preferred, such as in some coatings and adhesives. Compared to Antioxidant 245, Antioxidant 1135 may have different solubility characteristics and may be more suitable for certain formulations.
Antioxidant MD1024 is a metal - deactivating antioxidant, which is mainly used to prevent the oxidation of polymers caused by metal ions. In some applications where polymers are in contact with metals, such as in electrical wires and cables, the combination of Antioxidant 245 and Antioxidant MD1024 can provide comprehensive protection against oxidation and metal - induced degradation.
Conclusion
As a supplier of Antioxidant 245, I have witnessed the significant impact of this product in various industries. Its wide range of applications in polyolefins, engineering plastics, elastomers, adhesives, and coatings demonstrates its versatility and effectiveness in preventing oxidation and degradation of polymers.
If you are looking for a reliable antioxidant solution for your polymer products, Antioxidant 245 is an excellent choice. Whether you are a plastics manufacturer, a rubber processor, or a coating formulator, we can provide you with high - quality Antioxidant 245 to meet your specific requirements. We are committed to working closely with our customers to ensure that they get the best performance from our products. If you are interested in purchasing Antioxidant 245 or have any questions about its applications, please feel free to contact us for further discussion and negotiation.
References
- Zweifel, H., Maier, R. D., & Schiller, M. (2001). Plastics Additives Handbook. Hanser Publishers.
- Wypych, G. (2012). Handbook of Antioxidants. ChemTec Publishing.