Synergistic effect of antioxidant 1010,168

Antioxidants 1010, 168, 300, 2246S, etc. have good synergistic effects, and it is often necessary to use the two antioxidants together for better results in the design of anti-aging formulations. So, what is the synergistic mechanism of antioxidants 1010, 168, etc.? Below we briefly explain the principle, I hope to engage in plastic modification of friends to help.

When two chain-terminating antioxidants such as hindered phenols and use, the high activity of the antioxidant to give hydrogen atoms, so that the free radicals are inactive; and low-activity antioxidants can supply hydrogen atoms for the high activity of the antioxidant to regenerate it, so that the long-term effectiveness of the antioxidant, better anti-oxidant effect. When different spatially hindered antioxidants are used in parallel, they can also inhibit the delivery of free radicals. For example, after the termination of peroxyl radicals (ROO-) by high activity hindered phenols, the aryloxy radicals generated can easily trigger oxidative aging of polymers. The low activity hindered phenol can make the aryloxy radicals to generate high activity hindered phenol, thus avoiding the chain transfer effect caused by the interaction of aryloxy radicals and macromolecules.

Hindered phenol and hydroperoxide decomposer and use, on the one hand, can make the main antioxidant regeneration, on the other hand, can decompose hydroperoxide, synergistic effect is stronger, is the current plastics antioxidant is often used in the "golden partner", for example, antioxidant 1010 and antioxidant 168 and use.

For example, antioxidant 1010 and antioxidant 168 are used together. The synergistic reaction between two or more different stabilizing mechanisms in the same molecule is called self-synergistic effect. For example, antioxidant 300 and antioxidant 2246-S act as both primary and secondary antioxidants. In addition, the main antioxidant and ultraviolet absorber, metal ion passivator may also produce synergistic effect.

The main antioxidant of the compound stabilizer is phenolic antioxidant, such as antioxidant 1010, antioxidant 1076, antioxidant 264, etc., and the secondary antioxidant is phosphite, antioxidant 168, the synergistic component of which is more effective than a single component to inhibit the thermal degradation of polymers and oxygen degradation, and it has a better processing stability and a long-lasting stabilization of the comprehensive effect. It has excellent thermal processing stability as well as long-lasting stability.

Antioxidants 1010, 168, 1076, 264, 300 and other characteristics of their respective functions are different, we need to fully recognize the chemical properties of each antioxidant, but also need to understand the synergistic effect of its different components.