UV-curable non-isocyanate polyurea polymer and UV-curable coating composition containing the same

A UV-curable non-isocyanate polyurea polymer having one or more ethylenically unsaturated functional groups, wherein the ethylenically unsaturated functional group is attached to a nitrogen atom present in a backbone urea segment via —C(═O)—linkage, and wherein the non-isocyanate polyurea polymer is prepared by:

• (i) providing an ethylenically unsaturated compound having one or more carboxylic acid functional groups;
• and
• (ii) reacting said ethylenically unsaturated compound having one or more carboxylic acid functional groups with a multi-carbodiimide polymer to form the non-isocyanate polyurea polymer;
• wherein providing an ethylenically unsaturated compound having one carboxylic acid functional group comprises esterifying a hydroxyalkyl acrylate with a dibasic carboxylic acid, thereby forming the ethylenically unsaturated compound having one carboxylic acid functional group.