Photosensitive compounds, photopolymerizable compositions including the same, and methods of making and using the same

A reaction product prepared from reactants comprising:

• (a) at least one Michael addition donor material comprising two or more active methylene hydrogens;
• and
• (b) at least one Michael addition acceptor material (b) which is a hydroxy functional acrylamide is selected from the group consisting of N-methylol acrylamide and N-(2-hydroxyethyl)acrylamide.

A reaction product prepared from reactants comprising:

• (a) at least one Michael addition donor material comprising at least one Michael Addition donor phosphono functional group;
• and
• (b) at least one material capable of reacting with the at least one Michael addition donor phosphono functional group, the material comprising at least one Michael addition acceptor, wherein the reaction product is capable of forming free radicals upon exposure to actinic radiation.

A reaction product prepared from reactants comprising:

• (a) at least one cyano functional Michael addition donor material comprising two or more active methylene hydrogens;
• and
• (b) at least one monoacrylate capable of reacting with a Michael addition donor, the monoacrylate comprising at least one functional group selected from the group consisting of hydroxy, hydroxyalkyl, amino, aminoalkyl, carboxy, carboxyalkyl, cyano, and cyanoalkyl groups, wherein the reaction product is capable of forming free radicals upon exposure to actinic radiation.

A reaction product prepared from reactants comprising:

• (a) at least one Michael addition donor material comprising two or more active methylene hydrogens;
• and
• (b) at least one mono-functional Michael Acceptor capable of reacting with a Michael addition donor, the mono-functional Michael Acceptor having one Michael Acceptor group selected from the group consisting of maleimide, cinnamate, crotonate, acrylamide, vinyl phosphate and vinyl sulfonate, the mono-functional Michael Acceptor having at least one additional functional group selected from the group consisting of hydroxy, hydroxyalkyl, amino, aminoalkyl, carboxy, carboxyalkyl, cyano, and cyanoalkyl groups, wherein the reaction product is capable of forming free radicals upon exposure to actinic radiation.