Radiation curable composition

A non-aqueous radiation and thermally curable composition comprising:

• I. at least one hydroxyl functional urethane (meth)acrylate compound (A) having a hydroxyl value between 10 and 80 mg KOH/g and which is the reaction product of a hydroxyl functional (meth)acrylate compound (A1) obtained from the reaction of
• at least one diepoxy functional compound (A11a) with a (meth)acrylate compound (A11b) comprising at least one (meth)acrylate group and one carboxylic acid functional group
• with a diisocyanate functional compound (A3) selected from the group consisting of aliphatic and cycloaliphatic di-isocyanates,
• and optionally a compound (A2) different from compound (A1) comprising two hydroxyl groups,
• II. at least one isocyanate functional compound (B) comprising at least one isocyanate group and at least one (meth)acrylate group,
• III. optionally at least one compound (C) different from compound (A) which compound (C) comprises at least two hydroxyl groups suitable for polyaddition with compound (B) and optionally comprises at least one (meth)acrylate group, and
• IV. optionally at least one (meth)acrylate compound (D) which is substantially free of any chemical group reactive to hydroxyl groups of compounds (A) and (C) and to isocyanate group of compound (B).