Curable compositions based on (N-substituted carbamoyloxy)alkanoyloxyalkyl acrylate polymers

A crosslinkable composition comprising one or more prepolymers obtained by polymerizing, to a molecular weight of about 400 to about 150,000, one or more ethylenically unsaturated monomers with a composition comprising:

• (a) 0 to 10 weight percent of a lactone;
• (b) 0 to 10 weight percent of hydroxyethyl acrylate or methacrylate;
• (c) 0 to about 2 weight percent of one or more diacrylates;
• (d) 0 to about 10 weight percent of products resulting from Michael addition, acrylate polymerization, transesterification reactions, or other side reactions;
• (e) 0 to about 50 weight percent of a reactive monomer of the following average formula:
• ##STR6## wherein R.sup.5 is a divalent radical, R.sup.2 is hydrogen, methyl, or cyano, each of R.sup.3 and R.sup.4 is hydrogen, phenyl, or lower alkyl having 1 to about 6 carbon atoms, x is an integer having a value of about 1 to about 10, and y is an integer having a value of about 1 to about 20;
• (f) remainder to 100 weight percent of a reactive monomer of the following average formula:
• ##STR7## wherein R is an unsubstituted or substituted (i) linear or branched alkyl group having from 1 to 10 carbon atoms, or (ii) aryl, alkaryl or aralkyl group having 6 to 10 ring carbon atoms, or (iii) cycloalkyl group having from 5 to 8 ring carbon atoms when x is 1, and polyvalent alkylene, arylene, alkarylene or cycloalkylene having carbon atom values defined for (i) to (iii) supra and a valence equal to the value of x when x is greater than 1;
• wherein the substituents on the R group are not reactive with the isocyanato radical;
• R' and R" are hydrogen, phenyl, alkyl or alkoxy having from 1 to 6 carbon atoms;
• R'" is a linear or branched divalent alkylene of 1 to 10 carbon atoms, divalent cycloalkylene of 5 to 12 carbon atoms, or divalent arylene of 6 to 10 ring carbon atoms;
• X is hydrogen, methyl or cyano;
• x has a value of from 1 to 4;
• y is an integer having an average value of from 1 to about 20, and z is an integer having a value of from 3 to about 10.