| abstract |
"BLOCKED" POLYISOCYANATO-CONTAINING POLYMERS WHICH MAY BE OBTAINED VIA THE VINYL POLYMERIZATION OF UNSATURATED DIESTER DIISOCYANATES AS EXEMPLIFIED BY BIS(2-ISOCYANATOETHYL) FUMARATE WITH/WITHOUT ETHYLENICALLY UNSATURATED COMPOUNDS, E.G., STYRENE, VINYL ACETATE, ETC., FOLLOWED BY REACTING THE POLYISOCYANATO GROUPS OF THE RESULTING POLYMERS WITH A MONOFUNCTIONAL ACTIVE HYDROGEN COMPOUND. THE ABOVE REACTIONS MAY ALSO BE REVERSED TO THUS OBTAIN THE "BLOCKED" POLYMERS. |