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