Additionally, and in accordance with this invention, the mixed blowing agent is composed of {HEAD ~ dichlorodifluoromethane} and another consistuent which is at least one fluorocarbon from {TAIL ~ the Group A}, as defined hereinafter 
Additionally , and in accordance with this invention , the mixed blowing agent is composed of { HEAD ~ dichlorodifluoromethane } and another consistuent which is at least one fluorocarbon from { TAIL ~ the Group A } , as defined hereinafter
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH