PVC THERMAL STABILIZERS
During high temperature processing operations, PVC is subject to thermal degradation by a dehydrochlorination process, resulting in undesired effects such as discoloration and cross-linking. This type of degradation can also take place during end use at elevated temperatures, for example in automotive applications.
PVC thermal stabilizers function mainly by substitution of the labile allylic chlorine atoms that are intermediates in the dehydrochlorination process. By this mechanism they significantly enhance the heat stability of the polymer during both melt processing and end use.
Amfine provides thermal stabilizers for PVC designed for use in applications such as automotive interior and exterior components, film and sheet, calendering, extrusion, injection molding, and others.
In demanding applications like wire and cable insulation, pipe, and window profile, thermal stabilizers based on lead salts have been used for many years. These products can be highly effective thermal stabilizers, but their use is being phased out around the world due to the well established toxicity of lead and its salts. Amfine and its parent company Adeka have been world leaders in the development and commercialization of environmentally-friendly, heavy metal free thermal stabilizers for a variety of PVC applications.
We also supply lubricants for rigid PVC (RX-500 Series) and anti-chalking additives (ATC Series) for use in outdoor applications.