Advances in PVC heat and light stabilization

The market growth and developments in heat and light stabilizers in PVC industry, where the market is driven by both regulatory and cost-performance issues, are discussed. Tinuvin XT 833 is being used in roofing membranes, which is one of the most demanding flexible PVC applications. Chemson has developed lead and lead-free stabilizer packages for growing European wood-PVC composite market. The developments in rigid PVC stabilizers include additive packages designed for improved processing. Weathering test guidelines for PVC window profiles require extended testing periods equivalent to five years. Chalking or whitening of part surface of rigid or flexible PVC can also be observed in outdoor weathering tests.