(1) Light shielding agents: These are substances that can shield or reflect ultraviolet rays, preventing light from penetrating into the interior of polymers, thereby protecting polymers. Light shielding agents include inorganic pigments such as carbon black and titanium oxide and organic pigments such as phthalocyanine blue and phthalocyanine green, among which carbon black has the best afskærmningseffekt .
(2) Ultraviolet absorbers: They can effectively absorb ultraviolet rays with a wavelength of 290~410nm, but rarely absorb visible light. They have good thermal stability and light stability. According to their chemical structure, they can be mainly divided into: o-hydroxybenzophenone, benzotriazole, Salicylat, triazin og substitueret acrylonitril . De bruges sammen som hjælpestabilisatorer og hindrer lysstabilisatorer, især i polyolefiner eller belægninger .
(3) Slukkere: De kan acceptere den energi, der er absorberet af kromoforen i plastikken og sprede energien i form af varme, fluorescens eller fosforescens, hvorved polymere er mest anvendt i film og fibers {{{} de har en god stabiliserende virkning på polymere. Organiske nikkelchelater . Organisk nikkellysstabilisatorer har god ydeevne, men på grund af toksiciteten af tungmetalioner kan de erstattes af andre ikke-toksiske eller lavt toksiske slukkere .
) 20% ~ 30% internationalt .
(5) Hydroperoxide decomposer: It is a type of hindered amine light stabilizer. Polymers can produce hydroperoxides during storage and processing, leading to photooxidative degradation of polymers. Hydroperoxide decomposers can decompose peroxides to generate stable nitrogen-oxygen free radicals and further capture free radicals, thereby inhibering af polymernedbrydning .