Preferably, {HEAD ~ the saturated polyester polyols} comprising part A are characterized by {TAIL ~ an equivalent weight} of about 225 to about 600, an acid number not greater than about 4 and a hydroxyl number of about 104 to about 220 
are characterized by
Preferably , { HEAD ~ the saturated polyester polyols } comprising part A are characterized by { TAIL ~ an equivalent weight } of about 225 to about 600 , an acid number not greater than about 4 and a hydroxyl number of about 104 to about 220
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL REL TAIL 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