costabilizers
Costabilizers are additives used in polymer formulations to enhance stability and performance by working in concert with primary stabilizers. They are not primary stabilizers themselves but help extend the effectiveness of antioxidants, UV absorbers, or processing aids, often enabling a lower total load of stabilizers and reducing overall costs. In some contexts they are referred to as co-stabilizers.
They function by scavenging reactive radicals, decomposing hydroperoxides, chelating trace metals, or absorbing ultraviolet radiation, thereby
Common types include processing stabilizers such as phosphites used with polyolefins, metal soaps, and certain esters.
Applications span polyolefins, PVC, and engineering plastics in packaging, automotive parts, and consumer products. Design considerations