Organoclays as flame retardants for PVC

Peak heat release reduction is lower for plasticized PVC composites containing a modified montmorillonite compared to those formulated with the hectorite. One possible explanation is that the char of the sample containing the modified montmorillonite was less cracked. Both clays initiate accelerated HCl release from PVC resulting in unwanted color changes of the compounds. Copyright (C) 2008 John Wiley & Sons, Ltd.