The polyhydroxy component A) according to the invention is a linear or branched compound having at least 2 hydroxyl groups in the molecule and containing from 0.1 to 20 wt %, preferably from 0.2 to 10 wt % and particularly preferably from {HEAD ~ 0.4 to 6 wt %} of {TAIL ~ hydroxyl groups} 
The polyhydroxy component A ) according to the invention is a linear or branched compound having at least 2 hydroxyl groups in the molecule and containing from 0.1 to 20 wt % , preferably from 0.2 to 10 wt % and particularly preferably from { HEAD ~ 0.4 to 6 wt % } of { TAIL ~ hydroxyl groups }
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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL