Radiation-curable coating composition, method of coating a substrate and coated substrate

A radiation-curable coating composition comprising:

• a 5-substituted-2 (5H)-furanone compound A of general formula (I)
• wherein n is 0 or an integer with a value in the range of from 1 to 5, and wherein,
• if n is 0, R is a hydrogen atom or an organic group comprising in the range of from 1 to 40 carbon atoms, and,
• if n is an integer with a value in the range of from 1 to 5, R is an organic group comprising in the range of from 1 to 40 carbon atoms;
• and
• a compound B with two or more vinyl ether or vinyl ester groups,
• wherein the molar ratio of vinyl moieties in compound B and furanone moieties in compound A is at least 0.5, and
• wherein the coating composition is free of a compound with two or more acryloyl or methacryloyl groups.