Primary Antioxidants: Anti-free radical oxidation Usually phenolic antioxidants such as: BHT (Butylated Hydroxy Toluene) Irganox 1010, 1076 (by BASF) Application: Protect plastics during processing and early use Secondary Antioxidants: Anti-oxidation due to peroxide, working in combination with primary AO Usually phosphite or phosphonite, for example: Irgafos 168 (phosphite antioxidant) Tris(nonylphenyl) phosphite Application: Protection in high temperature processing Special Antioxidants: Thioesters, lactone AO, blends AO (AO blends): used for engineering plastics, harsh applications
PP, PE Prevent aging, keep color, improve processing ABS, PS, HIPS Maintain impact strength impact, anti-yellowing PVC Heat stability, limit PVC decomposition PA (Nylon), POM Increase heat resistance, prevent brittle cracking Masterbatch Maintain color stability and additive performance TPE, TPU, EVA Protect elasticity and long-term softness
Anti-oxidation Prevents polymer chain oxidation Heat stability Limits thermal decomposition in injection molding/extrusion Color stability Reduces yellowing due to heat or UV rays Increases product life Helps plastic retain physical and mechanical properties longer Physical and chemical properties Powder, granule, or liquid form - dissolves well in plastic
