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 {HEAD ~ reaction} of {TAIL ~ all isocyanate groups} of such monomeric compound with at least one saturated or unsaturated compound containing at least one isocyanate reactive active hydrogen atoms 
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 { HEAD ~ reaction } of { TAIL ~ all isocyanate groups } of such monomeric compound with at least one saturated or unsaturated compound containing at least one isocyanate reactive active hydrogen atoms
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