ETERNACOLL® polycarbonate diols are used mainly in the manufacture of high-performance polyurethane coatings, adhesives & sealants, and elastomers. The origin of these higher performance in polycarbonate diol based polyurethanes, compared to their traditional counterparts as polyester diol or polyether diol, is due to the presence of carbonate group in the polymer. This group is much more stable against hydrolysis than the ester group and also has a greater stability against UV radiation and high temperatures than the ether group.