Antioxidants prevent degradation processes

Additive that minimizes or prevents the effects of oxygen attack on the plastic (e.g. yellowing or degradation). Such additives may render the plastic brittle or to lose mechanical properties. A group of substances being able to inhibit radical reactions in the polymer and thus prevent degradation processes. Different types are available: sterically hindered phenols and phosphites as base for polyolefins, sulphur based heat stabilisers and C-radical scavengers for special applications.