Antioxidants
The range of antioxidants offered by B.A. Special Chem & Color includes primary antioxidants (phenols) and secondary antioxidants (phosphites and thioethers).
Uses and classifications
Although, under normal conditions and in the presence of O2, the predominant oxidation mechanism in organic materials is light-induced oxidation, it is also important to prevent heat oxidation, as various thermal shocks can occur during high-temperature processes or production phases such as synthesis, mixing, extrusions, curing, etc.
For this purpose the use of antioxidants is required; the primary or phenolic ones cover a wide temperature range and are used to improve thermal stability over time.
The addition of secondary antioxidants (mainly phosphites) extends the performance of primary ones by means of a synergistic effect.
Conversely, thioethers are used when there are high ageing temperatures.
For this purpose the use of antioxidants is required; the primary or phenolic ones cover a wide temperature range and are used to improve thermal stability over time.
The addition of secondary antioxidants (mainly phosphites) extends the performance of primary ones by means of a synergistic effect.
Conversely, thioethers are used when there are high ageing temperatures.
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ANTIOXIDANTS |
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| What they are | Sterically hindered phenols, phosphites and thioethers. |
| What they are used | Exterior and interior. |
| What they are used for | Protecting against heat oxidation. |
| What they protect against | Loss of mechanical properties, yellowing, loss of gloss, embrittlement. |
| Functional mechanism | Deactivation of free radicals. |
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