The mixed blowing agents are particularly characterized as {TAIL ~ mixtures} of {HEAD ~ dichlorodifluoromethane} and at least one fluorocarbon constituent A, as defined 
The mixed blowing agents are particularly characterized as { TAIL ~ mixtures } of { HEAD ~ dichlorodifluoromethane } and at least one fluorocarbon constituent A , as defined
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH