FAQs Archive - Rewa Additives

Lead stabilizers are lead-based additives often used in PVC Processing. They are added to PVC to slow undesirable reactions and improve its lifespan.

Unlike internal lubricants that enhance the polymer melt’s flow properties, external lubricants tend to migrate to the PVC’s surface, forming a lubricating layer between the melt and the processing equipment.

Internal and External Lubricants are two types of lubricants used in PVC applications. They serve the process of reducing friction. However, both of these category of lubricants act differently and have distinct functions. There are certain lubricants such as Stearic Acid that act as both external and internal lubricants.

Unlike internal lubricants that enhance the polymer melt’s flow properties, external lubricants tend to migrate to the PVC’s surface, forming a lubricating layer between the melt and the processing equipment.

Lead-based Stabilizers are used in PVC processing, so Lead is present in minute quantities. However, with growing concerns around the side effects of lead, there are Lead-Free Stabilizers available that can be used in formulating PVC compounds.

Based on the chemical composition, performance characteristics, and environmental considerations, following are the types of PVC stabilizers. Organotin Stabilizers: Calcium-Zinc Stabilizers: Lead Stabilizers: Barium-Cadmium Stabilizers: Tin Stabilizers: Organic Stabilizers: