RADICAL-CURABLE COMPOSITION

The present invention is directed to a radical-curable coating composition comprising(A) One or more oligomers selected from the group consisting of urethane (meth)acrylates, (meth)acrylated epoxidized triglycerides and any mixture thereof, wherein said oligomers have a molar mass equal to or higher than 800 g/mol and lower than 4500 g/mol,(B) One or more methacrylate reactive diluents having a molar mass lower than 800 g/mol, wherein said methacrylate reactive diluents have an average methacrylate functionality higher than 2,(C) One or more acrylate reactive diluents having a molar mass lower than 800 g/mol, wherein said acrylate reactive diluents have an average acrylate functionality higher than 2,(D) One or more photo-initiators, and(E) One or more thermal initiators,wherein the acrylate functionalities of the acrylate reactive diluents (C) and the methacrylate functionalities of the methacrylate reactive diluents (B) are present in a molar ratio of the acrylate functionalities to the methacrylate functionalities of at least 0.2,wherein the amount of oligomers (A) is higher than 20 wt. % and lower than 90 wt. % and the amount of reactive diluents (B) and (C) is higher than 10 wt. % and lower than 80 wt. %, based on the total amount of (A), (B) and (C), andwherein the total amount of (A), (B) and (C) is at least 25 wt. % of the radical-curable coating composition.