| 摘要 |
PROBLEM TO BE SOLVED: To provide an activated energy ray-curable composition capable of forming a large-thickness cured film excellent in abrasion resistance, weatherability, crack resistance and the like, and to provide an automobile headlamp lens using the same. SOLUTION: The activated energy ray-curable composition comprises: 10 to 20 pts.mass of (A) polyester (meth)acrylate having a tetrahydrophthalic acid residue, a trimethylolpropane residue and a (meth)acryloyl group; 20 to 50 pts.mass of (B) (meth)acrylate having an isocyanurate skeleton and two or more functionalities; 10 to 30 pts.mass of (C) (poly)urethane(meth)acrylate obtained by reacting (c1) a diisocyanate, (c2) a polyol and (c3) hydroxy(meth)acrylate; and 10 to 30 pts.mass of (D) (meth)acrylate having a viscosity at 25°C of 200 mPa s or less and three or more functionalities (with the proviso that the total amount of (A) to (D) is 100 pts.mass), and there is provided also an automobile headlamp lens having a cured film produced by curing the composition to have a film thickness of 15 to 30μm. COPYRIGHT: (C)2010,JPO&INPIT
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