Chlorinated paraffins are the world's lowest cost secondary plasticizer for flame retardant flexible PVC compounds. Significant quantities are used throughout the world, primarily outside of the United States. In the U.S. the use of chlorinated paraffins has lagged behind the use of phosphate esters in flame retardant flexible PVC. This is principally due to concerns and misconceptions regarding the heat stability and compatibility of chlorinated paraffins. This paper documents the recent progress that has been made in the field of chlorinated paraffin secondary plasticizers with regard to overall economics, heat stability and compatibility in flexible PVC FR compounds.
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