Light stabilizers

Light stabilization systems significantly extend the lifetime of rubber products. The choice of stabilizers depends on the type of raw elastomer and the curing system used. It depends also on the performance requirements and desired secondary properties of stabilizers (e.g., product form, solubility, compatibility, volatility). The light stabilizers are classified according to their mode of action: ultraviolet light absorbers (UVAs) act by shielding the rubber from ultraviolet light, while hindered amine (or amide) light stabilizers (HALS) act by scavenging the radical intermediates formed in the photo-oxidation process.