Patcham Ltd. offers a wide range of liquid PVC heat stabilizers suitable for a variety of processing techniques.

The low thermal stability of PVC is very well known. Despite that, processing at elevated temperatures is possible without damage by the addition of specific heat stabilizers. This is one of the chief reason why PVC has developed to become a major bulk plastic. The development and production of suitable heat stabilizers kept pace with the production of PVC from the very beginning; and will continue to be the precondition for processing and application in the future.

Besides degradation during processing, PVC is also affected by light and weathering.

Processing of PVC while maintaining its functional properties is only possible by the addition of specific heat stabilizers which retard dehydrochlorination, autoxidation, reduce fragmention (preventive stabilizing function) and also cure existing damage (curative stabilizing function).

The following general requirements of a heat stabilizer may be highlighted.

A heat stabilizer must be capable of rebinding the dehydrochlorination reaction or at least must be able to retard this reaction (preventive function).