Siloxanes and Silicones, di-Me, 3-(2-hydroxyethoxy)propyl group-terminated, polymers with 1,4-butanediol, 1,6-diisocyanatohexane, di-Me carbonate, 1,3-dioxolan-2-one, 1,6-hexanediol, hydrazine, 3-hydroxy-2-(hydroxymethyl)-2-methylpropanoic acid, 5-isocyanato-1-(isocyanatomethyl)-1,3,3-trimethylcyclohexane, 1,1'-methylenebis[4-isocyanatocyclohexane] and 2-methyl-1,3-propanediol, compds. with triethylamine