Polymeric and oligomeric dimethylsiloxanes with alcoholic groups and their conversions into polymers with dimethylsiloxane and urethane moieties

Abstract Addition of allyloxytrimethylsilane ( 2a ) or allyl 2,3‐epoxypropyl ether ( 2c ) to dihydrosiloxanes ( 1a and 1b ) leads to the protected organoalkylsiloxanes 3a, 4a, 5a, 3c and 4c , which can be hydrolyzed to the corresponding hydroxyl compounds 3b, 4b, 5b and 4d . Addition of isocyanates 6a—c to these hydroxyl compounds results the model compounds 7a—c and 8a—c. Polymers 10a, b and 11a, b were prepared under similar conditions by addition of diisocyanates 9a, b to the hydroxyl compounds.