Radiation curable composition for composite material

An actinic radiation curable and/or thermally curable composition (I) for composite material comprising:

• (A) at least 20 wt % of compound A comprising at least 2 ethylenically unsaturated moieties and a structural moiety selected from the group consisting of polyalkylene glycol;
• polycaprolactone;
• polybutadiene or a hydrogenated or partially hydrogenated form thereof;
• polyisoprene or the hydrogenated or the partially hydrogenated form thereof;
• and/or polyester derivable from a polyol and a dicarboxylic acid;
• (B) at least 20 wt % of compound B comprising at least 2 ethylenically unsaturated moieties and a cycloaliphatic structure or heterocyclic aliphatic structure;
• (C) from 1 to 40 wt % of a compound C different from compound A and B containing essentially one ethylenically unsaturated moiety and having a viscosity of less than 100 mPa·s measured at 25° C., preferably below 50 mPa·s, even more preferably below 25 mPa·s;
• and
• (D) from 0 to 20 wt % of a compound D, comprising at least one ethylenically unsaturated moiety, and which is different from compound A, B and C;
• whereby the total of compound B and A have a content of from 60 to 99 wt % in view of the total content of compounds A, B, C and optionally D;
• and
• wherein composition (I) has, after curing, a Tg of at least 90° C. according to the standard test method ASTM E1640 using dynamic mechanical analysis.