Acrylyl-terminated urea-urethane compositions

An acrylyl-terminated urea-urethane comprising the reaction product obtained by reacting a mixture consisting essentially of:

• a. an organic polyisocyanate having at least 2 isocyanato groups;
• b. a hydroxylamine of the structure:
• HOR'NHR
• wherein R is hydrogen, alkyl of from 1 to 10 carbon atoms cycloalkyl of 5 to 12 carbon atoms or aryl of 6 to 12 carbon atoms and R' is divalent alkylene of 1 to 12 carbon atoms, arylene of 6 to 12 carbon atoms or cycloalkylene of 5 to 12 carbon atoms;
• and
• c. a hydroxyhydrocarbyl acrylate of the structure:
• ##EQU5## wherein Z is hydrogen or methyl and R' is as hereinbefore defined;
• and wherein the number of equivalents of isocyanato groups in the organic polyisocyanate charged is from about 80 percent to about 105 percent of the sum total of the number of equivalents of hydrogen atoms reactive therewith that are present in the hydroxyl and amine groups in said hydroxylamine and in said hydroxyhydrocarbyl acrylate.