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ADEKA PALMAROLE offers a full range of solid and liquid primary and secondary antioxidants.
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Antioxidants- Blends
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Physical blends of stabilizers with different stabilization mechanisms are the state of the art today. The overall effect of two stabilizers is better than what would be expected based on the sum of effects of each component alone.
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Phenolic
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Phenolic antioxidants are radical scavengers which prevent thermal degradation of many organic and polymeric materials. Their effectiveness increases when used in combination with phosphites, thioethers and light stabilizers.
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Phosphorus based (Phosphites)
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Phosphites are efficient decomposers of hydroperoxides that are formed during the autooxidation of polymers. Phosphites are especially used in melt processing where they are added in blends with hindered phenolic anti-oxidants. Such combinations are more effective than hindered phenol alone.
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Sulfur based
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Sulfur-containing antioxidants, also referred to as thioethers, react with and decompose polymer peroxide to inert substances. These so-called ‘secondary anti-oxidants’ exhibit a remarkable synergism in combination with hindered phenols to offer additional long term stability.
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