Three petroleum-derived secondary bitumens were used as a medium for thermo
lysis of poly(ethylene terephthalate), poly(vinyl chloride), polyethylene a
nd a typical waste plastics mixture (mainly polyolefins). The conversion ca
rried out at 300-350 degrees C resulted in the formation of homogeneous bri
ttle resin-like masses (ring-and-ball softening point above 120 degrees C)
intended for practical use. Copyright (C) 1999 John Wiley & Sons, Ltd.