uv stabilizers include uv absorbers (uva) and hindered amine light stabilizers (hals). uva absorbs ultraviolet, while hals can efficiently quench the radicals caused by ultraviolet, which results to ease the damages of products from the ultraviolet.
photoinitiators are applied in the light-cured coating system. in practice, photoinitiators are activated by the photocleavage mechanism by absorbing the energy from uv light or visible light. in this way, the free radical or the protonic acid is formed so as to trigger the polymerization reaction.
antioxidants reduce the thermal degradation and the oxidation caused during the thermal process to protect the mechanical properties and the color of plastic materials.
by effectively insulate the heat and isolate or prevent the diffusion of oxygen to reduce the combustibility of products. recommended applications include plastic and coatings.
