{HEAD ~ R4} is a hydrogen, or an aliphatic, cycloaliphatic or aromatic radical having from 1 to 9 carbon atoms, or ##STR31## Q is the monovalent or polyvalent residue of a monomeric aliphatic, cycloaliphatic or aromatic isocyanate compound having at least one isocyanate group, which residue remains after reaction of all isocyanate groups of such monomeric compound with at least one saturated or unsaturated compound containing {TAIL ~ at least one isocyanate reactive active hydrogen atoms} 
{ HEAD ~ R4 } is a hydrogen , or an aliphatic , cycloaliphatic or aromatic radical having from 1 to 9 carbon atoms , or # # STR31 # # Q is the monovalent or polyvalent residue of a monomeric aliphatic , cycloaliphatic or aromatic isocyanate compound having at least one isocyanate group , which residue remains after reaction of all isocyanate groups of such monomeric compound with at least one saturated or unsaturated compound containing { TAIL ~ at least one isocyanate reactive active hydrogen atoms }
HEAD HEAD HEAD HEAD HEAD 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 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 TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL